Resizing volumes using vxassist


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Resizing volumes using vxassist

The following modifiers are used with the vxassist command to resize a volume:

`growto`	Increases volume size to a specified length.
`growby`	Increases volume size by a specified amount.
`shrinkto`	Reduces volumesize to a specified length.
`shrinkby`	Reduces volume size by a specified amount.

Warning: You cannot grow or shrink any volume associated with an encapsulated root disk (rootvol, usr, var, opt, swapvol, and so on) because these map to a physical underlying partition on the disk and must be contiguous. If you attempt to grow rootvol, usrvol, varvol, or swapvol, the system could become unbootable if you need to revert back to booting from slices. It can also prevent a successful Solaris upgrade and you might have to do a fresh install. Additionally, the upgrade_start script might fail.

Extending to a given length

To extend a volume to a specific length, use the following command:

# vxassist [-b] [-g diskgroup] growto volume length

If specified, the -b option makes growing the volume a background task.

For example, to extend volcat to 2000 sectors, use the following command:

# vxassist -g mydg growto volcat 2000

If you previously performed a relayout on the volume, additionally specify the attribute layout=nodiskalign to the growto command if you want the subdisks to be grown using contiguous disk space.

Extending by a given length

To extend a volume by a specific length, use the following command:

# vxassist [-b] [-g diskgroup] growby volume length

If specified, the -b option makes growing the volume a background task.

For example, to extend volcat by 100 sectors, use the following command:

# vxassist -g mydg growby volcat 100

If you previously performed a relayout on the volume, additionally specify the attribute layout=nodiskalign to the growby command if you want the subdisks to be grown using contiguous disk space.

Shrinking to a given length

To shrink a volume to a specific length, use the following command:

# vxassist [-g diskgroup] shrinkto volume length

For example, to shrink volcat to 1300 sectors, use the following command:

# vxassist -g mydg shrinkto volcat 1300

Warning: Do not shrink the volume below the current size of the file system or database using the volume. The vxassist shrinkto command can be used safely on empty volumes.

Shrinking by a given length

To shrink a volume by a specific length, use the following command:

# vxassist [-g diskgroup] shrinkby volume length

For example, to shrink volcat by 300 sectors, use the following command:

# vxassist -g mydg shrinkby volcat 300

Warning: Do not shrink the volume below the current size of the file system or database using the volume. The vxassist shrinkby command can be safely used on empty volumes.


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