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All users of the volume set must be initially logged off before an
split-volume backup of that set can be performed. Use the VSCLOSE command with the SPLIT option
to split the volume set into user volumes and backup volumes:
:TELL @ LOGOFF FOR BACKUP
:VSCLOSE PROD_SET; SPLIT
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Use the VSOPEN command to make the volume set available. Both user volumes and backup volumes attempt to be mounted. If either of them has been taken offline, the command only mounts the available volume set half. After the volume set is placed split-volume using the VSOPEN command, it is mounted.
Notify users that the volume set is available for use:
:VSOPEN PROD_SET
PROD_SET SPLIT USER VOLUME MOUNTED ON LDEV 32
(AVR 23)
PROD_SET SPLIT BACKUP VOLUME MOUNTED ON LDEV 33
(AVR 24)
:TELL @ SYSTEM IS AVAILABLE NOW
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| | | |  | NOTE: Once a volume set has been taken offline with a VSCLOSE command, it can only be mounted with a VSOPEN command, not by bringing it online. | | | | |
Use the STORE command with the SPLITVS parameter to back up the volume set. The tape produced by a split volume STORE command is fully compatible with that from a normal STORE command:
:FILE T; DEV=TAPE
:STORE @.@.@; T; SPLITVS=PROD_SET; SHOW
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Invoke VOLUTIL.
Use the JOINMIRRSET command to join the user and backup halves of a split volume set to make them mirrored again. After the volume set is joined, a repair starts using the volumes that were specified by the source parameter as the source volumes.
:VOLUTIL
Mirvutil A.00.00, (C) Hewlett-Packard Co., 1990.
All Rights Reserved.
volutil:JOINMIRRSET PROD_SET SOURCE=USER
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The SOURCE=USER option is specified so that users can continue accessing the volume set while the join is initiated and the repair takes place.
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