How to Check the Status of a RAID-5 Volume

When checking status of RAID-5 volumes, you need to check both the RAID-5 state and the slice state to fully understand the state of the volume and the possibility of data loss if the volumes are not in an Okay state. See Overview of Checking Status of RAID-5 Volumes for details.

RAID-5 volume initialization or resynchronization cannot be interrupted.

Step

To check the status of a RAID-5 volume, use one of the following methods:

• From the Enhanced Storage tool within the Solaris Management Console, open the Volumes node and view the status of the volumes. Choose a volume. Then, choose Action⇒Properties to see more detailed information. For more information, see the online help.

• Use the metastat command to display the status of a RAID-5 volume.

  # metastat [-s diskset] [volume]

  -s diskset

  Specifies the name of the disk set on which to perform the command.

  volume

  Specifies the volume to display.

  For each slice in the RAID-5 volume, the metastat command shows the following:

  Device

  Specifies the device name of the slice in the stripe.

  Start Block

  Specifies the block on which the slice begins.

  Dbase

  Specifies whether the slice contains a state database replica

  State

  Specifies the state of the slice.

  Hot Spare

  Specifies whether the slice is being used to hot spare a failed slice

Example 15–2 Viewing RAID-5 Volume Status

The following example shows RAID-5 volume output from the metastat command.

# metastat d10
d10: RAID
    State: Okay        
    Interlace: 32 blocks
    Size: 10080 blocks
Original device:
    Size: 10496 blocks
        Device              Start Block  Dbase State        Hot Spare
        c0t0d0s1                 330     No    Okay        
        c1t2d0s1                 330     No    Okay        
        c2t3d0s1                 330     No    Okay 

The metastat command output identifies the volume as a RAID-5 volume. This information is indicated by the “RAID” notation after the volume name. For each slice in the RAID-5 volume, the output shows the following:

• The name of the slice in the stripe.

• The block on which the slice begins.

• An indicator that none of these slices contain a state database replica.

• The state of the slices. In this example all slices are in the “Okay” state.

• If a slice is a hot spare replacement for a failed slice.