1-5
•
Dedicated hot spare disk: It can serve as the spare disk for a specified RAID. You can
configure one or more dedicated hot spare disks for each RAID. The dedicated hot spare disk
can automatically replace the failed disk that appears in the specified RAID.
The RAID card supports hot spare disk configuration through the following methods:
•
Configuring the hot spare disk in UEFI boot mode (
3.1.2 3. Configuring a Hot Spare Disk
•
Configuring the hot spare disk in Legacy boot mode (
3.2.2 3. Configuring a Hot Spare Disk
3. Copyback
After the hot spare disk replaces the failed disk in a RAID, the data in the failed disk is rebuilt into
the hot spare disk. When the RAID card detects that the failed disk is replaced by a new disk, data
is copied from the hot spare disk back to the new disk. After the copy is completed, the hot spare
disk returns to the hot standby state. The copyback function is often used for array creation and
array repair.
4. RAID Level Migration
When the existing RAID configuration does not meet the requirements, the RAID level can be
modified without affecting the data integrity.
RAID cards support the migration of the following RAID levels:
•
RAID 0 to RAID 1, RAID 5, and RAID 6
•
RAID 1 to RAID 0, RAID 5, and RAID 6
•
RAID 5 to RAID 0, RAID 1, and RAID 6
•
RAID 6 to RAID 0, RAID 1, and RAID 5
describes the minimum disk requirements for RAID level migration.
表
1-5
Disk quantity description for RAID level migration
RAID Level Migration Mode
Minimum Number of Original
Disks
Number of Additional Disks
Required
RAID 0 to RAID 1, RAID 5, or RAID 6
2
1
RAID 1 to RAID 0, RAID 5, or RAID 6
2
1
RAID 5 to RAID 0 or RAID 6
3
1
RAID 6 to RAID 0 or RAID 5
3
1
The RAID card supports RAID level migration through the following methods:
•
Migrating the RAID level in UEFI boot mode (
)
5. Expanding the RAID Capacity
When the existing RAID capacity does not meet the requirements, the RAID card can expand the
RAID capacity by increasing the available space.
The RAID card supports RAID capacity expansion through the following methods:
•
Expanding the RAID capacity in UEFI boot mode (
3.1.2 8. Expanding the RAID Capacity
)
•
Expanding the RAID capacity in Legacy boot mode (