Create a Hardware Mirrored Volume

1. Verify which hard drive corresponds with which logical device name and physical device name, using the raidctl command:

   # raidctl
   Controller: 1
   Disk: 0.0.0
   Disk: 0.1.0
   Disk: 0.2.0
   Disk: 0.3.0
   Disk: 0.4.0
   Disk: 0.5.0
   Disk: 0.6.0
   Disk: 0.7.0

   See Disk Slot Numbers.

   The preceding example indicates that no RAID volume exists. In another case:

   # raidctl
   Controller: 1
   Volume:c1t0d0
   Disk: 0.0.0
   Disk: 0.1.0
   Disk: 0.2.0
   Disk: 0.3.0
   Disk: 0.4.0
   Disk: 0.5.0
   Disk: 0.6.0
   Disk: 0.7.0

   In this example, a single volume (c1t0d0) has been enabled.

   The Sun SPARC Enterprise T5120 or T5220 server’s on-board SAS controller can configure as many as two RAID volumes. Prior to volume creation, ensure that the member disks are available and that there are not two volumes already created.

   The RAID status might be:

   • OPTIMAL – Indicating that the RAID volume is online and fully synchronized.

   • SYNC – Indicating that the data between the primary and secondary member disks in an IM are still synchronizing.

   • DEGRADED – Indicating that a member disk is failed or otherwise offline.

   • FAILED – Indicating that volume should be deleted and reinitialized. This failure can occur when any member disk in an IS volume is lost, or when both disks are lost in an IM volume.

   The Disk Status column displays the status of each physical disk. Each member disk might be GOOD, indicating that it is online and functioning properly, or it might be FAILED, indicating that the disk has hardware or configuration issues that need to be addressed.

   For example, an IM with a secondary disk that has been removed from the chassis appears as:

   # raidctl -l c1t0d0
   Volume                  Size    Stripe  Status   Cache  RAID
           Sub                     Size                    Level
                   Disk
   ----------------------------------------------------------------
   c1t0d0                  136.6G  N/A     DEGRADED OFF    RAID1
                   0.1.0   136.6G          GOOD
                   N/A     136.6G          FAILED

   See the raidctl(1M) man page for additional details regarding volume and disk status.

   ---

   Note - The logical device names might appear differently on your system, depending on the number and type of add-on disk controllers installed.

   ---

2. Type the following command:

   # raidctl -c primary secondary

   The creation of the RAID volume is interactive, by default. For example:

   # raidctl -c c1t0d0 c1t1d0
   Creating RAID volume c1t0d0 will destroy all data on member disks, proceed (yes/no)? yes
   ...
   Volume c1t0d0 is created successfully!
   #

   As an alternative, you can use the –f option to force the creation if you are sure of the member disks and sure that the data on both member disks can be lost. For example:

   # raidctl -f -c c1t0d0 c1t1d0
   Volume c1t0d0 is created successfully!
   #

   When you create a RAID mirror, the secondary drive (in this case, c1t1d0) disappears from the Solaris device tree.

3. To check the status of the RAID mirror, type the following command:

   # raidctl -l c1t0d0
   Volume                  Size    Stripe  Status   Cache  RAID
           Sub                     Size                    Level
                   Disk
   ----------------------------------------------------------------
   c1t0d0                  136.6G  N/A     SYNC     OFF    RAID1
                   0.0.0   136.6G          GOOD
                   0.1.0   136.6G          GOOD

   The preceding example indicates that the RAID mirror is still resynchronizing with the backup drive.

   The following example shows that the RAID mirror is synchronized and online.

   # raidctl -l c1t0d0
   Volume                  Size    Stripe  Status   Cache  RAID
           Sub                     Size                    Level
                   Disk
   ----------------------------------------------------------------
   c1t0d0                  136.6G  N/A     OPTIMAL  OFF    RAID1
                   0.0.0   136.6G          GOOD
                   0.1.0   136.6G          GOOD

   The disk controller synchronizes IM volumes one at a time. If you create a second IM volume before the first IM volume completes its synchronization, the first volume’s RAID status will indicate SYNC, and the second volume’s RAID status will indicate OPTIMAL. Once the first volume has completed, its RAID status changes to OPTIMAL, and the second volume automatically starts synchronizing, with a RAID status of SYNC.

   Under RAID 1 (disk mirroring), all data is duplicated on both drives. If a disk fails, replace it with a working drive and restore the mirror. For instructions, see Delete a Hardware RAID Volume.

   For more information about the raidctl utility, see the raidctl(1M) man page.

Related Information

• Disk Slot Numbers

• Delete a Hardware RAID Volume