An XH320 configured with two hard disks
The LSISAS 1064E redundant array of independent disks (RAID) controller card cannot rebuild a RAID after RAID 1 is degraded.
1. Configure two hard disks with RAID 1 properties. The hard disk in slot 0 is lost, and RAID 1 is degraded, as shown in Figure 1.
Figure 1 Hard disk in slot 0 lost
2. Power off the server, replace the LSISAS1064E controller card with a new one that has no RAID configuration, and power on the server. RAID 1 is in the Inactive/Degrade state, as shown in Figure 2.
Figure 2 RAID 1 state
3. Enter the SAS basic input/output system (BIOS) and activate the degraded RAID 1. RAID 1 is in Active/Degraded state, as shown in Figure 3.
Figure 3 RAID 1 in Active/Degraded state
4. Insert a new hard disk in slot 0. Data is not synchronized in RAID 1.
5. On the PHY Properties screen of the SAS BIOS, the new hard disk in slot 0 can be queried, as shown in .
Figure 4 New hard disk in slot 0
When RAID 1 is degraded, activate the degraded RAID, insert a new hard disk, and set the new hard disk to be the hot spare disk. Then the RAID is automatically rebuilt.
RAID information of the LSISAS1064E controller card is stored both in member hard disks and the NVRAM on the LSISAS1064E controller card. After a new RAID controller card is used, the new RAID controller card's NVRAM does not have RAID information about the current hard disks. Therefore, the RAID cannot be rebuilt.