Creating a Hot Spare Pool

Creating a Hot Spare Pool
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How to Create a Hot Spare Pool

Caution

Do not create volumes or hot spares larger than 1 Tbyte if you expect to run the Solaris software with a 32–bit kernel or if you expect to use a version of the Solaris OS prior to the Solaris 9 4/03 release. See Overview of Multi-Terabyte Support in Solaris Volume Manager for more information about multiterabyte volume support in Solaris Volume Manager.

Caution

Solaris Volume Manager does not warn you if you create a hot spare that is not large enough. If the hot spare is not equal to, or larger than, the volume to which it is attached, the hot spare will not work.

Check Prerequisites for Creating Solaris Volume Manager Components.

Become superuser.
To create a hot spare pool, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node. Then, choose Action⇒Create Hot Spare Pool. For more information, see the online help.
- Use the following form of the metainit command:
```
# metainit hot-spare-pool-name ctds-for-slice
```
  hot-spare-pool-name
  
  Specifies the name of the hot spare pool.
  
  ctds-for-slice
  
  Specifies the slice being added to the hot spare pool. The option is repeated for each slice being added to the hot spare pool.
  
  See the metainit ( 1M ) man page for more information.
Note

The metahs command can also be used to create hot spare pools.

Example 17.1. Creating a Hot Spare Pool

# metainit hsp001 c2t2d0s2 c3t2d0s2
hsp001: Hotspare pool is setup

In this example, the hot spare pool hsp001 contains two disks as the hot spares. The system confirms that the hot spare pool has been set up.

To add more hot spares to the hot spare pool, see How to Add Additional Slices to a Hot Spare Pool. After you create the hot spare pool, you need to associate it with a submirror or RAID-5 volume. See How to Associate a Hot Spare Pool With a Volume.

How to Add Additional Slices to a Hot Spare Pool

Check Prerequisites for Creating Solaris Volume Manager Components.

Become superuser.
To add a slice to an existing hot spare pool, use one of the following methods:
- From the Enhanced Storage tool within the Solaris Management Console, open the Hot Spare Pools node. Choose the hot spare pool you want to change. Choose Action⇒Properties. Then, choose the Hot Spares panel. For more information, see the online help.
- Use one of the following forms of the metahs command:
```
# metahs -a hot-spare-pool-name slice-to-add
```
```
# metahs -a -all hot-spare-pool-name slice-to-add
```
  a hot-spare-pool-name
  
  Specifies to add the slice to the specified hot spare pool.
  
  a all
  
  Specifies to add the slice to all hot spare pools.
  
  slice-to-add
  
  Specifies the slice to add to the hot spare pool.
  
  See the metahs ( 1M ) man page for more information.
Note

You can add a hot spare to one or more hot spare pools. When you add a hot spare to a hot spare pool, the hot spare is added to the end of the list of slices in the hot spare pool.

Example 17.2. Adding a Hot Spare Slice to One Hot Spare Pool

In this example, the a option adds the slice /dev/dsk/c3t0d0s2 to hot spare pool hsp001. The system verifies that the slice has been added to the hot spare pool.

# metahs -a hsp001 /dev/dsk/c3t0d0s2
hsp001: Hotspare is added

Example 17.3. Adding a Hot Spare Slice to All Hot Spare Pools

In this example, the a option used with all adds the slice /dev/dsk/c3t0d0s2 to all hot spare pools configured on the system. The system verifies that the slice has been added to all hot spare pools.

# metahs -a -all /dev/dsk/c3t0d0s2
hsp001: Hotspare is added
hsp002: Hotspare is added
hsp003: Hotspare is added