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Local and Global Hot Spares, Automatic Incorporation of Hot-Swapped Drives, Storage > RAID Sets

UPC - 753253016563

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RAIDs Local and Global Hot Spares A hot spare is a disk drive that can automatically replace a damaged drive in a RAID 1, 5, 6, or 10. Designating a disk drive as a hot spare helps ensure that data is available at all times. If one disk drive in a RAID fails or is not operating properly, the RAID automatically uses the hot spare to rebuild itself without administrator intervention. Snap Servers offer two kinds of hot spares: local and global. Item Definitions Identifying Description Local (hot) spare - A local (or dedicated) hot spare is associated with and is available only to a single RAID. Administrators typically create a local hot spare for RAIDs containing mission-critical data that must always be available. Global (hot) spare - A hot spare that may be used for any RAID 1, 5, 6, or 10 in the system (assuming sufficient capacity) as necessary. Hot spares are identified on the Storage > Disks/Units screen using the following icons: Interaction Each icon will be associated with a disk in the RAID, identifying that disk as either a local hot spare or a global hot spare. When a drive in a RAID fails, the system looks for a hot spare in the following order: 1 If a local hot spare dedicated to the RAID exists, use the local hot spare. 2 If no local hot spare is available, and there is a single hot spare of sufficient capacity, use the global hot spare. 3 If no local hot spare is available, and two global hot spares of different capacity are available, use the smaller hot spare with sufficient capacity. Automatic Incorporation of Hot-Swapped Drives If a RAID (except RAID 0) is running in degraded mode and a raw drive, a nonGuardianOS drive, or an unassigned GuardianOS-partitioned drive is "hotinserted" into a Snap Server, it can be automatically assigned as a local spare and used to rebuild the degraded RAID. If there are no degraded RAIDs, a hot-inserted non-GuardianOS or unassigned drive will be automatically configured as a global hot spare. To enable the automatic incorporation of an unassigned drive, go to the Storage > RAID Sets screen and click the RAID Settings button. 44 Snap Server Administrator Guide

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

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RAIDs

Snap Server Administrator Guide

Local and Global Hot Spares

hot spare

is a disk drive that can automatically replace a damaged drive in a

RAID 1, 5, 6, or 10. Designating a disk drive as a hot spare helps ensure that data is

available at all times. If one disk drive in a RAID fails or is not operating properly,

the RAID automatically uses the hot spare to rebuild itself without administrator

intervention. Snap Servers offer two kinds of hot spares: local and global.

Automatic Incorporation of Hot-Swapped Drives

If a RAID (except RAID 0) is running in degraded mode and a raw drive, a non-

GuardianOS drive, or an unassigned GuardianOS-partitioned drive is “hot-

inserted” into a Snap Server, it can be automatically assigned as a local spare and

used to rebuild the degraded RAID. If there are no degraded RAIDs, a hot-inserted

non-GuardianOS or unassigned drive will be automatically configured as a global

hot spare. To enable the automatic incorporation of an unassigned drive, go to the

Storage > RAID Sets

screen and click the

RAID Settings

button.

Item

Description

Definitions

Local (hot) spare

— A local (or dedicated) hot spare is associated

with and is available only to a single RAID. Administrators typically

create a local hot spare for RAIDs containing mission-critical data that

must always be available.

Global (hot) spare

— A hot spare that may be used for any RAID 1, 5,

6, or 10 in the system (assuming sufficient capacity) as necessary.

Identifying

Hot spares are identified on the

Storage > Disks/Units

screen using

the following icons:

Each icon will be associated with a disk in the RAID, identifying that

disk as either a local hot spare or a global hot spare.

Interaction

When a drive in a RAID fails, the system looks for a hot spare in the

following order:

If a local hot spare dedicated to the RAID exists, use the local hot

spare.

If no local hot spare is available, and there is a single hot spare of

sufficient capacity, use the global hot spare.

If no local hot spare is available, and two global hot spares of

different capacity are available, use the smaller hot spare with

sufficient capacity.