Dell VNX8000 Using VDM MetroSync with VDM MetroSync Manager
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- Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 1
EMC® VNX® Series Version 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery P/N 302-002-248 REV. 04 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 2
Copyright © 2015-2017 Dell Inc. or its subsidiaries. All rights reserved. Published March 2017 Dell believes the information in this publication is accurate as of its publication date. The information is subject to change without notice. THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS-IS." DELL - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 3
for each file system on your VDM.... 35 Migrate Data Mover configurations and cabinet level service 35 Create a VDM synchronous replication session 36 Configure CIFS CA support 38 Configure for NFS I/O transparency in VDM synchronous replication session...40 Chapter 5 Managing by using - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 4
VDM MetroSync service 75 Stop the VDM MetroSync service 76 Manually failover a synchronous replication session 76 Manually reverse a Service checklists 81 Enable VDM synchronous replication service checklist 82 VDM synchronous replication session checklist 82 Chapter 9 Troubleshooting - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 5
86 NAS database mirrors are out of sync 86 How to recover when all Data Movers are panicking 87 Error messages 88 Training and Professional Services 88 Appendix A Changing FSID ranges 91 Update the FSID range minimum size 92 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 6
CONTENTS 6 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 7
, and service, go to Online Support (registration required) at http://Support.EMC.com. Troubleshooting-Go to Online Support. After logging in, locate the applicable Support by Product page. Technical support-For technical support and service requests, go to Customer Service on Online Support. After - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 8
Preface Note Do not request a specific support representative unless one has already been assigned to your particular system problem. Your comments Your suggestions will help us continue to improve the accuracy, organization, and overall quality of the user publications. Please send your opinion of - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 9
CHAPTER 1 Introduction Topics include: l Welcome to VDM MetroSync 10 l System requirements 10 l Restrictions and limitations 11 l User interface choices 14 l Related information 14 Introduction 9 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 10
for a true disaster recovery (DR) where the source is unavailable. For DR support in the event of an unplanned failover, an option is provided to recover and describes the EMC VDM MetroSync Manager software. Along with the same manual operations that you can perform by using CLI commands, the VDM - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 11
cores with 2 GB memory each l 4 GB drives for log files Restrictions and limitations The following the same expected performance, you should use the same disk types between each of the VNX2 systems. l Do not use the VDM MetroSync Manager service: n If you are manually activating a standby Data - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 12
follow the How to recover when all Data Movers are panicking on page 87 process to fix the NAS service before a synchronous replication session can be cleaned. l VDM MetroSync is not supported on systems where Cabinet-level File DR solutions are in use. l If you are using the Preserve RepV2 session - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 13
Availability (CA) capability. Keep this in mind if you configure CIFS CA support for VDM synchronous replication. Manual migration The replication of Data Mover configurations or Cabinet level service is not included in VDM synchronous replication. The following Data Mover configuration and - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 14
l Configuring and Managing CIFS on VNX l Configuring NFS on VNX l Managing Volumes and File Systems for VNX Manually l Using VNX SnapSure l Configuring Virtual Data Movers on VNX l Parameters Guide for VNX for File l Virtual Data Movers on EMC VNX (white paper) l EMC VNX Replication Technologies - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 15
Introduction the Support by Product page, to locate information for the specific product or feature required. Related information 15 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 16
Introduction 16 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 17
CHAPTER 2 Concepts Topics include: l VDM synchronous replication logical entities 18 l Use cases...19 Concepts 17 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 18
Concepts VDM synchronous replication logical entities In order to enforce the restrictions and limitations that apply to synchronous replication (see Restrictions and limitations on page 11), the following entities are specific to a VDM synchronous replication environment: l Sync-replicable NAS - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 19
Use cases Concepts l All file systems (including the VDM rootfs) mounted on it must be split-log file systems. l All file systems (including the VDM rootfs) and checkpoints mounted on it must be created on its sync-replicable NAS pool. VDM MetroSync can be used in the following use cases: l - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 20
Concepts 20 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 21
VNX systems 23 l Add systems to the same Unisphere domain 25 l Create RAID groups for WIL and CPL LUNs 25 l Enable the VDM synchronous replication service 26 l Create a block storage pool on source and destination VNX2 systems 28 Setting up prerequisites 21 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 22
up prerequisites VDM synchronous replication setup information The following table provides a planning sheet for your VDM Sync Replication setup information. Table 1 VDM synchronous replication setup planning sheet What you specify Control Station name Control Station IP address Control Station IP - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 23
current IP address as the IP alias, answer yes to the question, and then type a new IP address to replace the current IP address. For example, to use zones and daylight savings time, if applicable. EMC recommends using an NTP service on the Control Stations to control this function. You can set this - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 24
configuration. Example: To add an entry for the Control Station of the source VNX system, cs100, from the destination VNX system cs110, type: $ nas_cel -create cs100 -ip 192.168.168.12 -passphrase nasadmin Output: operation in progress (not interruptible)... id = 2 name = cs100 24 EMC VNX - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 25
Setting up prerequisites owner = 0 device = channel = net_path = 192.168.168.12 celerra_id = APM000340000680000 passphrase = nasadmin Add systems to the same Unisphere domain To add both source and destination VNX2 systems to the same Unisphere domain: Procedure 1. In Unisphere, login to - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 26
. l Two systems have been joined to the same Unisphere domain. Before you can create a sync-replicable VDM, you must enable the synchronous replication service between the source and destination systems. 26 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 27
storage pool to create synchronous replication mirror LUNs. Example: To enable the VDM synchronous replication service, on either the source or destination system type: nas_cel -syncrep -enable id=1 -local_fsidrange 4096,18000 remote_fsidrange 18001,32000 -local_storage raid_group=0 remote_storage - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 28
must first disable the service before choosing different LUNs. If the MirrorView connection type is iSCSI, the enable service operation may time out to the Unisphere online help. You can also create step-by-step instructions tailored to your VNX environment by going to the mydocuments site at https - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 29
for each file system on your VDM............35 l Migrate Data Mover configurations and cabinet level service 35 l Create a VDM synchronous replication session 36 l Configure CIFS CA support 38 l Configure for NFS I/O transparency in VDM synchronous replication session... 40 Configuring 29 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 30
the target NAS pools. Create NAS user-defined pools Before you begin The procedures in this section require the following: l The VDM synchronous replication service must be enabled. l Data LUNs for NAS resources and NAS Disks Volumes have been created. Create the desired number of NAS user-defined - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 31
you create a sync-replicable VDM: l The synchronous replication service has been enabled between the two VNX2 systems, source instructions to modify a non-syncreplicable VDM to be syncreplicable. Procedure 1. At the source site, type the following command syntax: $ nas_server [-name ] [-type - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 32
Configuring [-name ] [-type vdm] -create = Creates a VDM with an optional name for the specified VDM. The movername is casesensitive and supports the following characters: a through z, A through Z, 0 through 9, _ (underscore), - (hyphen) though names may not start with a hyphen. - - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 33
integer, contain the word root or contain a colon (:). Example: To create a file system checkpoint on a sync-replicable NAS pool, type: fs_ckpt VDM1_FS -Create 2. Alternatively, you can also create a checkpoint schedule by using the following syntax. nas_ckpt_schedule -create -filesystem - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 34
default is 1 Example: To create a daily checkpoint schedule, type: nas_ckpt_schedule -create VDM1_Schedule -filesystem VDM1_FS recurrence daily -runtimes 20: network interface for a sync-replicable VDM: l The synchronous replication service has been enabled between the two VNX2 systems, source and - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 35
source VNX system, type: nas_server -vdm Support.EMC.com and in the Related documents section of the VNX Series on the mydocuments site at https:// mydocuments.emc.com/. Migrate Data Mover configurations and cabinet level service The migration of Data Mover configurations and Cabinet level service - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 36
default route, does not get migrated with this command. The routes must be configured manually. To add a default gateway or a route entry, a network interface with a be configured and ready for communication. l Synchronous replication service has been enabled between the two VNX2 systems, source and - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 37
you must manually migrate some Data Mover and Cabinet level service items. Refer to Migrate Data Mover configurations and cabinet level service on page 35 remote network interface(s)... Now updating local disk type... Now updating remote disk type... Now generating session entry... done done done - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 38
on VNX. Example: To mount and export network Shares, type: $ server_mount server_2 -o smbca fs1 /fs1 $ server_export server_2 -P cifs -name fileshare -option type=CA /fs1 3. If necessary, set the File server CIFS parameter smb2.maxCaTimeout. To support VNX File Server CA, the File server uses a CIFS - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 39
be active on the destination VNX2 system. Example: Use the server_setup CLI command to start CIFS service manually. Type: $ server_setup server_2 -Protocol cifs -option start 6. If the VNX system needs to communicate it is working by using the server_ping CLI command. Configure CIFS CA support 39 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 40
address conflict on the network. Use one of the following ways to test whether the network interface works: l When the VDM is not in service to users, do a synchronous replication session reverse and check if the CIFS server can be connected after the reverse. l Create a network interface using an - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 41
. If the destination VNX2 system network interface is created manually after synchronous replication session creation, it can be configured to test whether the network interface works: l When the VDM is not in service to users, do a synchronous replication session reverse and check if the NFS client - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 42
Configuring 42 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 43
for File CLI Topics include: l About using the VNX for File CLI for managing 44 l List information for VDM synchronous replication service 44 l Show information for a sync-replicable VDM 44 l Reverse a synchronous replication session 45 l Failover a synchronous replication session 48 l Clean - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 44
environment and are also useful for troubleshooting. List information for VDM synchronous replication service To see which storage system has the VDM synchronous replication service enabled, do the following: Procedure 1. At the source site, type the following command syntax: $ nas_cel -syncrep - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 45
id=83 Output: id = 83 name = my_vdm acl = 0 type = vdm server = server_2 rootfs = root_fs_vdm_my_vdm I18N mode = ASCII mountedfs = syncreplicable = True member_of = status : defined = enabled actual = loaded, ready Interfaces to services mapping: Note The line of syncreplicable is - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 46
, in order to support CIFS CA (Continuous Availability) on reverse, you must use the SMB 3.0 client with CA enabled. If the service outage time can be the synchronous replication session. Procedure 1. At the destination site, type the following command syntax: $ nas_syncrep -reverse {|id= - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 47
done: 3 s Now turning up local network interface(s)... done: 0 s Service outage end: 83 s Now mounting unexported FS(s)/checkpoint(s)... done: 0 s after the synchronous replication session reverse operation completes. You must manually remove the invalid DNS entry after the reverse operation. Until - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 48
MetroSync Manager product, you need to manually failover the source sync-replicable VDM to support CIFS CA (Continuous Availability) on failover, you must use the SMB 3.0 client with CA enabled. If the service . Procedure 1. At the destination site, type the following command syntax: $ nas_syncrep - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 49
want to proceed? [yes or no] 2. At the warning prompt, type yes. Output: Now doing precondition check... done: 30 s Now turning up local network interface(s)... done: 0 s Service outage end: 69 s Now mounting unexported FS(s)/ operation completes. You must manually remove the invalid DNS entry - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 50
will be powered on, the network infrastructure between the source and remote systems should remain in place when the source system is returned to service. This allows the IP address conflict avoidance mechanism to function properly, by determining which site is active and which site is in standby - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 51
at the destination site to standby. 5. At the original source VNX2 system site, type the following command syntax: $ nas_syncrep -Clean {-all||id=} where: < source VNX2 system for a single synchronous replication session, type: $ nas_syncrep -Clean id=8002 Output: Now cleaning session - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 52
for a single system or for both the source and destination systems. To view VDM synchronous replication service information, do the following: Procedure 1. At the source site, type the following command syntax: $ nas_cel -syncrep -info {|id=} [verbose] where: 52 EMC VNX Series - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 53
replication information about the specified VNX system. Example: To display VDM synchronous replication service information for a remote system with synchronous replication enabled, type: nas_cel -syncrep -info id=1 -verbose Output: id = 1 name = CS0_4224225 syncrep = enabled fsidrange - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 54
the VDM synchronous replication with MirrorView feature on the specified VNX system. Example: To disable the VDM synchronous replication service, on the source system type: nas_cel -syncrep -disable id=1 54 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 55
,10000] on local system... done Now removing other sync replication service settings on local system... done done Note If your system contains sync-replicable to non-sync-replicable, do the following: Procedure 1. Type the following command syntax: $ nas_server -vdm -option - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 56
yes Output: id = 80 name = test_vdm acl = 0 type = vdm server = server_2 rootfs = root_fs_vdm_test_vdm I18N mode = ASCII mountedfs = syncreplicable = True member_of = status : defined = enabled actual = loaded, ready Interfaces to services mapping: 56 EMC VNX Series 8.1 Using VDM - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 57
: $ nas_server -delete my_syncrep1 Output: id = 3 name = my_syncrep1 acl = 0 type = vdm server = rootfs = root_fs_my_syncrep1 I18N mode = UNICODE mountedfs = member_of = status : defined = enabled actual = permanently unloaded Interfaces to services mapping: Results The pool under the deleted VDM - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 58
the replicated NAS database is synchronized. To view VDM synchronous replication session information, do the following: Procedure 1. At the local site, type the following command syntax: $ nas_syncrep -info {-all||id=} [-verbose] where: -info {all||id=} [-verbose] = displays the - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 59
If an active VDM synchronous replication session exists, follow the instructions in Extend a sync-replicable NAS pool (with synchronous replication of one or more volumes Example: To extend the sync-replicable NAS pool, type: nas_pool -xtend VDM1_Pool -volumes d17,d18,d19,d20,d21 Results The sync- - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 60
NAS pool with a synchronous replication session on it, do the following: Procedure 1. On the main VDM MetroSync Manager window, verify that the Service State is Stopped. If not, click Stop. 2. In Unisphere, navigate to Storage > LUNs. Click Create and provision additional LUNs. 3. Add the LUNs - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 61
sync-replicable NAS pool (without synchronous replication session) on page 61). If an active VDM synchronous replication session does exist, follow the instructions in Shrink a sync-replicable NAS pool (with synchronous replication session) on page 62 to delete the session, shrink the pool, and then - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 62
one or more volumes Example: To shrink the sync-replicable NAS pool, type: nas_pool -shrink VDM1_Pool -volumes d21 Results The specified volumes are removed Procedure 1. On the main VDM MetroSync Manager window, verify that the Service State is Stopped. If not, click Stop. 2. Delete the synchronous - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 63
on the source and destination VNX2 Systems. l The NTP Service is configured on the source and destination secondary Control Stations. source secondary Control Station to the VDM synchronous replication configuration. Example: Type: # /nas/sbin/syncrep/syncrep_config_cs1 -cel_id 1 Output: Copying - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 64
Managing by using the VNX for File CLI IP alias of the destination VNX2 system, then run the command on the destination VNX2 system to update the IP alias of the source VNX2 system: nas_cel -modify -passphrase nasadmin -ip Updating VNX OE software When the VDM - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 65
CHAPTER 6 Working with ReplicatorV2 sessions Topics include: l About Replicator V2 sessions 66 l Enable Preserve RepV2 session for VDM MetroSync 66 l Create a ReplicatorV2 session on a sync-replicable VDM 66 l Show Preserve RepV2 session for VDM MetroSync status 67 l Disable Preserve RepV2 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 66
feature on a VNX only if: l The VNX has the VDM synchronous replication service enabled. l The Data Movers have the correct operating software version. l The system enable the Preserve RepV2 sessions for VDM MetroSync feature, type the following command: nas_syncrep_rr -config -enable Output: - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 67
a Rescan. e. Create a new VDM. f. If using CIFS, make sure that the CIFS service is started. 5. On System A, create a new ReplicatorV2 session for a file system from System show the Preserve RepV2 session for VDM MetroSync status, type the following command: nas_syncrep_rr -config -info Output: - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 68
sessions Disable Preserve RepV2 session for VDM MetroSync Procedure 1. To disable Preserve RepV2 session for VDM MetroSync, type the following command: nas_syncrep_rr -config -disable Output: Disabling PreserveRepv2 on remote array PreserveRepv2 disabled successfully Disabling PreserveRepv2 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 69
Originator Start Time End Time Schedule Response Statuses Working with ReplicatorV2 sessions = [email protected] = Tue May 12 22:27:28 EDT 201 = Tue May 12 22:27:43 EDT 201 = n/a = Restore ReplicatorV2 sessions 69 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 70
Working with ReplicatorV2 sessions 70 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 71
priority 74 l Select VDM IP addresses to monitor 75 l Start the VDM MetroSync service 75 l Stop the VDM MetroSync service 76 l Manually failover a synchronous replication session 76 l Manually reverse a synchronous replication session 76 l Collect logs...77 l Discover monitored objects 77 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 72
a failover policy for a VDM session. You can configure a synchronous replication session to failover automatically when the VDM MetroSync service is started, or you can manually run failover or reverse operations. 72 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 73
destination has a Failed status. If a VDM is failed over because of a VDM interface check failure, you must first fix the problem, and then either manually reverse the failed over session or rediscover the configurations for VDM MetroSync Manager. Otherwise, no sessions are automatically failed over - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 74
(VDM MetroSync Manager does the VDM check, but user must manually fail over the session), or NA (the VDM is ignored). The Failover Policy is effective once the VDM MetroSync service is started. By default, automatic failover is configured for all monitored VDM Sessions. 4. Click OK. Configure - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 75
box. Note If no IP addresses are selected, the Failover Policy changes to Manual. 4. Click OK. Results Any network interfaces that are not selected are not retrying. Note If a local standby Data Mover is configured, the service delays the failover operation for 20 seconds to allow for the local - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 76
reverse a synchronous replication session Before you begin The automated failover service cannot be running during a manual Reverse operation. Stop the service if it is still running. A manual reverse operation allows you to manually select all VDMs or a subset of VDMs to move to your destination - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 77
version of Windows being used. To create a collection log to help with troubleshooting issues: Procedure 1. On the main VDM MetroSync Manager window, select Help > Procedure 1. On the main VDM MetroSync Manager window, verify that the Service State is Stopped. If not, click Stop. 2. To discover - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 78
Using VDM MetroSync Manager l To always display the most current log entries first, select Follow Tail. If you do not select Follow Tail, then the oldest entries are displayed first. l The Main log window displays up to a maximum of 800 messages. If more than 800 messages are received, entries will - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 79
Using VDM MetroSync Manager Procedure 1. On the main VDM MetroSync Manager window, select one or more synchronous replication sessions. 2. Click the (information) icon. Show synchronous replication status 79 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 80
Using VDM MetroSync Manager 80 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 81
if there are any issues that need to be resolved with your VDM synchronous replication for disaster recovery configuration. Topics include: l Enable VDM synchronous replication service checklist 82 l VDM synchronous replication session checklist 82 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 82
following checklist to determine if there are issues with your service setup. If you answer no to any of these questions, you should troubleshoot those issues to resolve them. Table 3 VDM synchronous replication service setup checklist Service setup For VNX Systems with dual Control Stations, an IP - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 83
Service checklists Table 4 VDM synchronous replication session creation checklist VDM replication session creation yes/no Is the VDM replication session state either sync in progress or - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 84
Service checklists 84 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 85
document, contact your Customer Support representative. Problem Resolution Roadmap for VNX contains additional information about using Online Support and resolving problems. Topics included in this are panicking 87 l Error messages 88 l Training and Professional Services 88 Troubleshooting 85 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 86
Troubleshooting EMC E-Lab Interoperability Navigator The EMC E-Lab™ Interoperability Navigator is a searchable, web-based application that provides access to product interoperability support matrices. It is available on Online Support at https://Support synchronous replication service error. type - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 87
Troubleshooting CETV2151700109,MirrorView=nasdb_0109_428_mv, CloneGroup=nasdb_428_0109_clone service_status = state by using the following procedure. Procedure 1. Stop the NAS service. Type: $ /sbin/service nas stop 2. Start the PXE service. Type: $ /nasmcd/sbin/t2pxe -s -R where - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 88
Control Station. Type: $ reboot -fn Results After the Control Station reboot, the NAS service should be working and all Data Movers will be in the contacted state. Error messages All event, alert, and status messages provide detailed information and recommended actions to help you troubleshoot the - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 89
Troubleshooting the-art labs conveniently located throughout the world. Customer training courses are developed and delivered by experts. Go to Online Support at https:// Support.EMC.com for course and registration information. Professional Services can help you implement your system efficiently. - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 90
Troubleshooting 90 EMC VNX Series 8.1 Using VDM MetroSync with VDM MetroSync Manager for Disaster Recovery - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 91
APPENDIX A Changing FSID ranges Topics include: l Update the FSID range minimum size 92 Changing FSID ranges 91 - Dell VNX8000 | Using VDM MetroSync with VDM MetroSync Manager - Page 92
Changing FSID ranges Update the FSID range minimum size Procedure 1. In order to change the FSID range minimum size (default is 8192), copy the following entries from the /nas/sys/nas_param file to the /nas/site/ nas_param file: l #fsidrange:: l fsidrange:8192: 2. Using a vi editor, edit
EMC
®
VNX
®
Series
Version 8.1
Using VDM MetroSync with VDM MetroSync Manager
for Disaster Recovery
P/N 302-002-248 REV. 04