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Disks and Units
Chapter 4 Storage Configuration and Expansion 67
Disks and Units
The Disks/Units screen is a graphic representation of RAID configuration and disk
status on your server. The legend explains the meaning of each icon.
• Move the mouse over a RAID set name to highlight all disks within the RAID set.
• Click a RAID set name to view or edit the RAID set.
• Click a disk icon to view disk details.
• Click a unit’s LED icon to flash the unit’s LEDs for identification.
Note The LEDs will continue to flash for five minutes. To stop a unit’s flashing
LED, click that unit’s LED icon with a red ‘X’. To stop flashing LEDs for all units,
click the link at the bottom of the Disks/Units page.
Expansion arrays, if attached to your server, will also be displayed here.
Note If GuardianOS detects an expansion unit that is not integrated with the
SnapServer, a warning displays across the top of the Disks/Units screen with a link
to information about the orphan expansion unit.
• Adding New Disk Drives to Increase Capacity
Replacing Disk Drives on a RAID
This section describes how to safely remove and replace drives to a degraded RAID.
After a fresh drive is inserted into the drive bay, you must use the Administration
Tool to add it to a RAID.
How RAIDs React to Disk Drive Removal
• RAID 0 (nonredundant) — Removing a disk drive from a RAID 0 causes the RAID
to fail. This action renders any data residing on its drives inaccessible and is not
recommended. If a RAID 0 disk drive is inadvertently removed, reinserting it
should restore file access.
• RAID 1, 5, 6, or 10 (redundant) — Removing a disk drive from a two-drive RAID
1 or a RAID 5, 6, or 10 places the RAID into degraded mode. While operating in
degraded mode, users can access or even update data. However, the array loses
its redundant characteristics until all drives of the array are available and
operating properly (except for RAID 6, which can tolerate a two-drive failure
before it loses redundancy).
Note If you configure a RAID 1, 5, 6, or 10 with a hot spare, the array automatically
starts rebuilding with the hot spare when one of the disk drives fails or is removed.
Note Failed drives cannot be added back in to a RAID.
- Administrator Guide 1
- ETRUST ANTIVIRUS 6
- Contents 7
- Audience and Purpose 13
- Service and Technical Support 13
- Notes and Cautions 13
- Typographical Conventions 14
- Finding More Information 15
- Administrative Overview 17
- GuardianOS Specifications 18
- Feature Specification 19
- What’s New in GuardianOS 22
- What’s New in GuardianOS v5.1 23
- What’s New in GuardianOS v5.0 24
- What’s New in GuardianOS v4.4 25
- What’s New in GuardianOS v4.1 26
- What’s New in GuardianOS v4.0 27
- SnapServer Manager 28
- Launching SnapServer Manager 29
- Multiserver Administration 29
- SSM Feature Licensing 30
- Server Name 32
- Date/Time Settings 32
- Determining Capacity 33
- Configuring an APC-Brand UPS 35
- SnapExtensions 36
- Wake-on-LAN Support 36
- Chapter 2 37
- Gateway Information 38
- TCP/IP Options 39
- Option Setting Description 40
- Column Description 41
- Configuring TCP/IP Settings 43
- Link LED on the 43
- Network > Windows 45
- NFS Access 49
- Support for NFS 50
- AFP Configuration Guidelines 51
- FTP/FTPS Access 52
- HTTP/HTTPS Access 53
- Web View 54
- DHCP Server 55
- Print Server 55
- User & Group Management 59
- UID and GID Assignments 60
- Local Users and Groups 61
- NIS Domain 63
- Storage Configuration and 65
- Expansion 65
- Default Storage Configuration 66
- Local and Global Hot Spares 68
- Background Disk Scan 69
- RAID Management Tools 70
- RAID Groups 70
- Storage > RAID Sets or 71
- Volumes 72
- Expanding Volume Capacity 73
- Configuring Write Cache 74
- Checking Filesystems 74
- Volume Management Tools 75
- Quotas 76
- Data Migration 77
- Expansion Arrays 79
- Snap Expansion S50 80
- Disks and Units 83
- Adding Disk Drives to a RAID 84
- Hot Swapping Disk Drives 86
- Chapter 5 93
- Configuring iSCSI Initiators 94
- Microsoft Windows 100
- Creating iSCSI Disks 107
- Share and File Access 111
- Hidden Shares 112
- Share Level Permissions 113
- Where to Place Shares 113
- SnapTrees 114
- NFS Share Access 114
- Components and Options 115
- SnapTrees and Security Models 116
- SnapTree Functionality 117
- ID Mapping 118
- Guidelines 119
- Configuring Share Access 121
- Creating Home Directories 122
- Windows ACLs 123
- (Windows) 124
- Security Guides 125
- Snapshots 127
- Snapshot Management and Usage 128
- Snapshots and iSCSI Disks 129
- Adjusting Snapshot Pool Size 130
- Accessing Snapshots 130
- Disaster Recovery 133
- \\server_name\volume_name 134
- Backup Recommendations 136
- Pre-Restore Requirements 137
- Restore Recommendations 137
- Cloning a Server 140
- CA eTrust Antivirus Software 141
- Antivirus Dependencies 142
- The Local Scanner View 143
- Defining Scan Jobs 144
- Running a Manual Scan Job 146
- Scheduling a Scan Job 146
- Signature Updates 147
- Alert Options 151
- The Move Directory 152
- Log View 153
- Unicode 155
- Step 2: Back up your system 156
- Step 3: Convert to Unicode 156
- Step 4: Make a new DRImage 157
- Backing Up Unicode Servers 159
- Unicode and Expansion Arrays 161
- Unicode Converted Head Units 162
- SnapServer 163
- BakBone Netvault 164
- Preinstallation Tasks 168
- Backup of iSCSI Disks 182
- Command Line Interface 183
- Procedures 185
- SnapCLI Commands 186
- Command Description 187
- Scripts in SnapCLI 193
- Sample Script 194
- Delete the share 196
- Troubleshooting SnapServers 197
- Behavior 198
- System LED 199
- Network LEDs (N2000 199
- The Meaning of LED Indicators 201
- 1 2 3 4 209
- 56 78 209
- Fault LED 211
- SEP MASTER 214
- Ops Panel LEDs 218
- The LEDs operate as follows: 218
- System Reset Options 219
- Networking Issues 221
- Network > Windows screen 223
- Miscellaneous Issues 224
- Other Issues 225
- Phone Home Support 226
- Support screen 227
- Text Field Description 227
- GuardianOS Ports 229
- Network File System 231
- Glossary 233
- Term Definition 234
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