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Coordinating Snapshot and Backup Operations, Accessing Snapshots Within the Snapshot Share

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Coordinating Snapshot and Backup Operations read-only), a snapshot share inherits access privileges from its associated livevolume share. Note The same folders appear on the Web View screen when you connect to the Snap Server using a Web browser; however, the snapshot share folder does not provide access to the snapshot; it will always appear to be empty. You can prevent the snapshot share from displaying on this Web View screen by selecting the Hide Snapshot Share option when creating or editing a share. Accessing Snapshots Within the Snapshot Share A snapshot share contains a series of directories. Each directory inside the snapshot share represents a different snapshot. The directory names reflect the date and time the snapshot was created. For example, assume the snapshot share named Sales_SNAP contains the following four directories: latest 2005-12-25.120000 2006-01-01.000100 2006-01-07.020100 The latest directory always points to the most recent snapshot (in this case, 200601-07.020100, or January 7th, 2006, at 2:01 a.m.). A user may view an individual file as it existed at a previous point in time or even roll back to a previous version of the file by creating a file copy to the current live volume. Note The latest subdirectory is very useful for setting up backup jobs as the name of the directory is always the same and always points to the latest available snapshot. Coordinating Snapshot and Backup Operations Like backups, snapshots can be scheduled to recur at a designated time and interval. In addition to synchronizing the backup and snapshot schedules, you must create a share (and snapshot share) to the appropriate directory so that the backup software can access the snapshot. For most backup purposes, the directory specified should be one that points to the root of the volume so that all of the volume's data is backed up and available from the snapshot share. 1 Create a snapshot for each volume you want to back up. In the Administration Tool, navigate to the Storage > Snapshots screen, and click Create Snapshot. When defining and scheduling the snapshot, consider the following: • In the Create Recovery File pull-down menu, select Yes to ensure that the ACL, extended attributes, and quota information are captured and appended to the snapshot. This step is needed because many backup packages do not back up Chapter 7 Snapshots 99

Section	Page
Contents	7
Administrative Overview	15
GuardianOS Specifications	16
What’s New in GuardianOS	19
Snap Server Manager	23
Connecting to the Server for the First Time	26
Using the Initial Setup Wizard	28
Determining Capacity	29
Scheduling Data Protection Tasks	30
Migrating Data from Legacy Servers to the Snap Server	30
Configuring the Snap Server as a Print Server	31
Configuring an APC-Brand UPS	31
SnapExtensions	31
Network Access to the Server	33
Viewing Current Network Settings	34
TCP/IP Options	35
Configuring TCP/IP Settings	37
Default Network Protocol Settings	39
Windows Networking Configuration	40
Support for Windows Networking (SMB)	40
Support for Windows Network Authentication	41
NFS Access	44
Apple Networking Configuration	45
FTP Access	47
HTTP/HTTPS Access (Web View)	47
DHCP Server	48
Print Server	48
User & Group Management	51
Default User and Group Settings	52
UID and GID Assignments	52
Local Users and Groups	53
NIS Domain	54
Storage Configuration and Expansion	55
Default Storage Configuration	56
Changing the Default Storage Configuration	56
RAIDs	57
RAID Groups	59
Volumes	61
Quotas	63
Setting User Quotas	64
Data Migration	64
Preserving Permissions	65
Expansion Arrays	66
The SANbloc S50	66
Managing Expansion Array Storage	67
Disks and Units	69
Replacing Disk Drives on a RAID	69
Adding Disk Drives to a RAID	70
Hot Swapping Disk Drives	70
iSCSI Disks	77
Configuring iSCSI Initiators	78
iSCSI Configuration for Microsoft Windows using MS Initiator	79
Configuring the QLogic QLA4010 and QLA4050 iSCSI Initiators for Microsoft Windows	84
iSCSI Configuration for Linux and UNIX	84
iSCSI Configuration for Novell NetWare	86
iSCSI Configuration for VMware	86
iSCSI Configuration on the Snap Server	87
Creating iSCSI Disks	90
Share and File Access	93
Configuring Share and Folder Security Overview	94
Components and Options	96
SnapTrees and Security Models	98
ID Mapping	100
Creating Shares	101
Configuring Share Access	102
Share Access Behaviors	102
Setting Share Access Permissions	103
Creating Home Directories	104
Windows ACLs	104
Setting File and Directory Access Permissions and Inheritance (Windows)	105
Security Guides	106
Snapshots	109
Snapshot Management and Usage	110
Estimating Snapshot Pool Requirements	111
Adjusting Snapshot Pool Size	112
Accessing Snapshots	112
Coordinating Snapshot and Backup Operations	113
Disaster Recovery	115
Backing Up Server and Volume Settings	115
Backing Up the NetVault Database Directory	118
Recovering the NetVault Database	119
Disaster Recovery Procedural Overview	121
CA eTrust Antivirus Software	123
Antivirus Dependencies	124
Launching the CA eTrust Antivirus GUI	125
The Local Scanner View	126
Scan Job Configuration and Scheduling	127
Defining Scan Jobs	127
Running a Manual Scan Job	128
Scheduling a Scan Job	128
Signature Updates	129
Updating Snap Servers that have Internet Access	130
Updating a Snap Server that does not have Internet Access	131
Distributing Updates from One Server to Another	131
Verifying Download Events	133
Alert Options	134
The Move Directory	134
Log View	135
Unicode	137
What is Unicode?	137
Converting to Unicode	137
Unicode and Protocol Interaction	139
How Snapshots Interact with Unicode	141
Backing Up Unicode Servers	141
Unicode and Expansion Arrays	143
Backup and Replication Solutions	145
Integrated Backup Solutions for the Snap Server	146
BakBone Netvault	146
Snap Enterprise Data Replicator (Snap EDR)	147
Off-the-Shelf Backup Solutions for the Snap Server	149
Preparing to Install a Backup Solution	149
Preinstallation Tasks	150
Installing the CA BrightStor ARCserve Agent	151
Installing the Symantec Backup Exec RALUS Agent	154
Installing the Symantec NetBackup v6.5 Client	157
Installing the EMC Legato NetWorker Client	159
Command Line Interface	165
SnapCLI Syntax	165
Scripts in SnapCLI	168
Troubleshooting Snap Servers	173
The Meaning of LED Indicators	174
Snap Server 110/210 Status and Drive Light Behavior	174
Snap Server 410 Status and Drive Light Behavior	176
Snap Server 500 Series/600 Series Status and Drive Light Behavior	177
Snap Server 4200/4500 Status and Drive Light Behavior	180
Snap Server 18000 Status and Drive Light Behavior	182
SANbloc S50 Enclosure, Disk Drive, APC Module, and Controller Behavior	185
Snap Disk 10 Disk Drive and Power Supply Module LEDs	188
Snap Disk 30SA Disk Drive and Power/Fan Module Behavior	189
System Reset Options	192
Resetting the Snap Server to Factory Defaults	192
Performing System Resets Without Network Access	193
Networking Issues	194
Miscellaneous Issues	198
Phone Home Support	200
GuardianOS Ports	201
Glossary	207

Match case Limit results 1 per page

Coordinating Snapshot and Backup Operations

Chapter 7

Snapshots

read-only), a snapshot share inherits access privileges from its associated live-

volume share.

Note

The same folders appear on the Web View screen when you connect to the

Snap Server using a Web browser; however, the snapshot share folder does not

provide access to the snapshot; it will always appear to be empty. You can prevent

the snapshot share from displaying on this Web View screen by selecting the

Hide

Snapshot Share

option when creating or editing a share.

Accessing Snapshots Within the Snapshot Share

A snapshot share contains a series of directories. Each directory inside the snapshot

share represents a different snapshot. The directory names reflect the date and time

the snapshot was created. For example, assume the snapshot share named

Sales_SNAP

contains the following four directories:

latest

2005-12-25.120000

2006-01-01.000100

2006-01-07.020100

The

latest

directory always points to the most recent snapshot (in this case,

2006-

01-07.020100

, or January 7th, 2006, at 2:01 a.m.). A user may view an individual

file as it existed at a previous point in time or even roll back to a previous version of

the file by creating a file copy to the current live volume.

Note

The latest subdirectory is very useful for setting up backup jobs as the name

of the directory is always the same and always points to the latest available

snapshot.

Coordinating Snapshot and Backup Operations

Like backups, snapshots can be scheduled to recur at a designated time and

interval. In addition to synchronizing the backup and snapshot schedules, you must

create a share (and snapshot share) to the appropriate directory so that the backup

software can access the snapshot. For most backup purposes, the directory specified

should be one that points to the root of the volume so that all of the volume’s data is

backed up and available from the snapshot share.

Create a snapshot for each volume you want to back up.

In the Administration Tool, navigate to the

Storage > Snapshots

screen

and click

Create Snapshot

. When defining and scheduling the snapshot, consider the

following:

•

In the Create Recovery File pull-down menu, select

Yes

to ensure that the ACL,

extended attributes, and quota information are captured and appended to the

snapshot. This step is needed because many backup packages do not back up