Maintaining Hot Spare Pools

The following sections show how to perform maintenance tasks on hot spare pools.

How to Check the Status of Hot Spares and Hot Spare Pools

To view the status of a hot spare pool and its hot spares, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties to view detailed status information. For more information, see the online help.
- Run the following form of the metastat command:
```
# metastat hot-spare-pool-name
```

Example 17-8 Viewing the Status of a Hot Spare Pool

The following example shows sample output from the metastat command on a hot spare pool.

# metastat hsp001
hsp001: 1 hot spare
        c1t3d0s2                Available       16800 blocks

The metahs command can also be used to check the status of a hot spare pool.

For information on the hot spare pool states and the possible actions to take, see Hot Spare Pool States.

How to Replace a Hot Spare in a Hot Spare Pool

Become superuser.
Verify whether the hot spare is currently being used by using one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties. Then choose the Hot Spares panel. Follow the onscreen instructions. For more information, see the online help.
- Use the following form of the metastat command to view the status of the hot spare pool:
```
# metastat hot-spare-pool-name
```
  For more information, see the metastat(1M) man page.
To replace the hot spare, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties. Then choose the Hot Spares panel. Follow the onscreen instructions. For more information, see the online help.
- Use the following form of the metahs command:
```
# metahs -r hot-spare-pool-name current-hot-spare replacement-hot-spare
```
  -r
  
  Specifies to replace disks in the named hot spare pool.
  
  hot-spare-pool-name
  
  Specifies the name of the hot spare pool. You can also use the special keyword all to change all hot spare pool associations.
  
  current-hot-spare
  
  Specifies the name of the current hot spare that will be replaced.
  
  replacement-hot-spare
  
  Specifies the name of the slice that will replace the current hot spare in the named hot spare pool.
  
  For more information, see the metahs(1M) man page.

Example 17-9 Replacing a Hot Spare in One Hot Spare Pool

In the following example, the metastat command shows that the hot spare is not in use. The metahs -r command replaces the hot spare, /dev/dsk/c0t2d0s2, with the hot spare, /dev/dsk/c3t1d0s2, in the hot spare pool, hsp003.

# metastat hsp003
hsp003: 1 hot spare
        c0t2d0s2                Broken       5600 blocks
# metahs -r hsp003 c0t2d0s2 c3t1d0s2
hsp003: Hotspare c0t2d0s2 is replaced with c3t1d0s2

Example 17-10 Replacing a Hot Spare in All Associated Hot Spare Pools

In the following example, the keyword all replaces the hot spare, /dev/dsk/c1t0d0s2, with the hot spare, /dev/dsk/c3t1d0s2, in all its associated hot spare pools.

# metahs -r all c1t0d0s2 c3t1d0s2
hsp001: Hotspare c1t0d0s2 is replaced with c3t1d0s2
hsp002: Hotspare c1t0d0s2 is replaced with c3t1d0s2
hsp003: Hotspare c1t0d0s2 is replaced with c3t1d0s2

How to Delete a Hot Spare From a Hot Spare Pool

Become superuser.
Verify whether the hot spare is currently being used by using one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties. Then choose the Hot Spares panel. Follow the onscreen instructions. For more information, see the online help.
- Use the following form of the metastat command to view the status of the hot spare pool:
```
# metastat hot-spare-pool-name
```
  See the metastat(1M) man page.
To delete the hot spare, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties. Then choose the Hot Spares panel. Follow the onscreen instructions. For more information, see the online help.
- Use the following form of the metahs command:
```
# metahs -d hot-spare-pool-name current-hot-spare
```
  -d
  
  Specifies to delete a hot spare from the named hot spare pool.
  
  hot-spare-pool
  
  Specifies the name of the hot spare pool. You can also use the special keyword all to delete the hot spare from all hot spare pools.
  
  current-hot-spare
  
  Specifies the name of the current hot spare that will be deleted.
  
  For more information, see the metahs(1M) man page.

Example 17-11 Deleting a Hot Spare from One Hot Spare Pool

In the following example, the metastat command shows that the hot spare is not in use. The metahs -d command deletes the hot spare, /dev/dsk/c0t2d0s2, in the hot spare pool, hsp003.

# metastat hsp003
hsp003: 1 hot spare
        c0t2d0s2                Broken       5600 blocks
# metahs -d hsp003 c0t2d0s2

How to Enable a Hot Spare

Become superuser.
To return a hot spare to the “available” state, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node and select a hot spare pool. Choose Action⇒Properties. Then, choose the Hot Spares panel. Follow the onscreen instructions. For more information, see the online help.
- Use the following form of the metahs command:
```
# metahs -e hot-spare-slice
```
  -e
  
  Specifies to enable a hot spare.
  
  hot-spare-slice
  
  Specifies the name of the slice to enable.
  
  For more information, see the metahs(1M) man page.

Example 17-12 Enabling a Hot Spare

In the following example, the metahs command places the hot spare, /dev/dsk/c0t0d0s2 in the “Available” state after it has been repaired. It is unnecessary to specify a hot spare pool.

# metahs -e c0t0d0s2