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14.2.11 Re-enabling a Hardware RAID Volume


14.2.11 Re-enabling a Hardware RAID Volume
This section describes how to re-enable a hardware RAID volume after replacing the CPU memory unit (lower) of the SPARC M12-2/M12-2S/M10-4/M10-4S or the SPARC M12-1/M10-1 motherboard unit.
After replacing the unit mentioned above, the hardware RAID volume is inactive because there is no hardware RAID information on the SAS controller (hardware RAID controller). Therefore, you need to re-enable the hardware RAID volume by using the following procedures.
  1. Select the device, display its volume information, and confirm that it is not enabled.
Note - After executing the select command, you need to execute the unselect-dev command. After the procedure is finished, execute the unselect-dev command according to the instruction in step 4.
  1. In the following example, the indication Inactive is shown, meaning that the RAID volume is inactive.
{0} ok select /pci@8000/pci@4/pci@0/pci@0/scsi@0
{0} ok show-volumes
Volume 0 Target 11e Type RAID1 (Mirroring)
Name raid1-volume WWID 0c233a838262c6c5
Optimal Enabled Inactive Consistent
2 Members 1169920000 Blocks, 598 GB
Disk 0
Primary Optimal
Target a TOSHIBA MBF2600RC 3706 PhyNum 0
Disk 1
Secondary Optimal
Target b TOSHIBA MBF2600RC 3706 PhyNum 1
{0} ok
  1. Execute the activate-volume command to enable the RAID volume.
    The following example shows that the RAID volume with volume number 0 is re-enabled.
{0} ok 0 activate-volume
Volume 0 is now activated
{0} ok
  1. Execute the show-volumes command, and confirm that the RAID volume is enabled.
    In the following example, the indication Data Scrub in Progress is shown, meaning that the RAID volume is active.
{0} ok show-volumes
Volume 0 Target 11e Type RAID1 (Mirroring)
Name raid1-volume WWID 0c233a838262c6c5
Optimal Enabled Data Scrub In Progress
2 Members 1169920000 Blocks, 598 GB
Disk 0
Primary Optimal
Target a TOSHIBA MBF2600RC 3706 PhyNum 0
Disk 1
Secondary Optimal
Target b TOSHIBA MBF2600RC 3706 PhyNum 1
{0} ok
  1. Execute the unselect-dev command to unselect the controller that was selected during preparation.
{0} ok unselect-dev
{0} ok
Note - Perform the shutdown processing correctly before replacing the CPU memory unit (lower) of SPARC M12-2/M12-2S/M10-4/M10-4S or the SPARC M12-1/M10-1 motherboard unit. Then, confirm that the system stopped, and replace the part.
If the system stops without the shutdown processing due to a blackout, etc., an unintended media check may be executed after the RAID volume is enabled.
During a media check, you cannot get the media check status from the Fcode utility or the SAS2IRCU utility. During this time, the RAID volume state becomes Optimal. Check whether the LED of the disk drive is blinking to confirm the media check execution status. When the LED of the disk drive changes from blinking to on, it means that the media check has ended.
During the media check, you can access the hardware RAID volume as is normally done, but the I/O performance may be insufficient, compared to the hardware RAID volume when the media check is not being executed.
The required media check time is the same as the synchronization time for hardware RAID configuration or maintenance. For the standard required time, see " Table 14-8 Standard Synchronization Time for the Hardware RAID."