Adaptec 5325301507 Administration Guide - Page 83
Disks and Units, Replacing Disk Drives on a RAID
UPC - 753253015740
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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. 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. Chapter 4 Storage Configuration and Expansion 67