Adaptec 5325301656 Administration Guide - Page 69

Disks and Units, Replacing Disk Drives on a RAID

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Disks and Units 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. You can also flash the LED lights on the physical server or expansion array using the LED button at the top left of each unit. This allows easy identification of different servers or expansions in your racks. Replacing Disk Drives on a RAID This section describes how to safely remove and add 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 With GuardianOS 5.0, failed drives cannot be added back in to a RAID. Chapter 4 Storage Configuration and Expansion 55

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Disks and Units
Chapter 4
Storage Configuration and Expansion
55
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.
You can also flash the LED lights on the physical server or expansion array using
the LED button at the top left of each unit. This allows easy identification of
different servers or expansions in your racks.
Replacing Disk Drives on a RAID
This section describes how to safely remove and add 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
With GuardianOS 5.0, failed drives cannot be added back in to a RAID.