The ALTERVOL command changes the permanent and transient disk space allocation for a particular volume. Permanent disk space is reserved for files, the label table, and free space map. The default value for permanent storage is 100%. Transient storage on system volumes is used for stacks and other temporary operating structures. For LDEV 1 the system master volume, the default value for transient space is 75% and the default value for permanent storage space is 75%.
The volume to be altered must be in the MASTER or MEMBER state.
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 | NOTE: When updating a new version of MPE XL, it is recommended that all volumes except LDEV 1 have permanent space set to 100% and transient space set to 100%. |
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Task |
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Sets permanent and transient disk storage space.
Capability |
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CV, create mountable volume set
Syntax |
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ALTERVOL [VNAME=]sname:vname
[PERM=]percentperm [TRANS=]percenttrans
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Parameters |
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- sname
The volume set that contains the volume to be modified. The master volume of this set must be mounted in the MASTER state. Required.
- vname
The volume to be modified. The volume must already be
initialized. Required.
- percentperm
A number between 0 and 100 specifying the new maximum percentage of disk space that can be allocated as permanent space on system and nonsystem volumes. Required.
- percenttrans
A number between 0 and 100 specifying the new maximum percentage of disk space that can be allocated as transient space on system volumes only. Required.
Example |
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This example shows how to change disk space allocation.
Set the maximum allocation of 100% for permanent and transient storage space.
volutil: ALTERVOL SAMPLE_SET:SAMPLE_VOL 100 100
Verify: Set maximum permanent to 100[Y/N]? Y
Verify: Set maximum transient to 100[Y/N]? Y
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Use the DISCFREE utility to display disk space allocations. Refer to the MPE/iX Utilities Manual (32650-90081) for more information on this utility.
