Backup fails with the error -311 and -312

Summary

The backup task may encounter the following error:

1) [-311] Could not start VSS Level=ERROR [0]
2) [-312] snapshot not found

Cause

1) There is not enough available disk space.
2) The driver that supported the kernel does not exist.

Resolution

1) Verify the available space on the backup target disk. The required available space for AIP is as follows:

Version	Minimum available space requirement
3.1	5% available space of the total size of the backup target disk
3.5	3% available space of the total size of the backup target disk
4.x	Snapshot temp area: 3% of the total size of the backup target Tracking area: 0.01% available space of the device total size

You can adjust the size of the snapshot temporary area using this command. This feature is available in ActiveImage Protector 3.5 or later.

#cd /opt/Actiphy
#./mkaiptmp setup

2) Installation and update of snapshot driver

# aipmng –modupdate –all

This command installs the driver matching the kernel information. If the module doesn't exist, it will search for the driver on the Actiphy Server.

If checking a driver at the time of a start of OS, edit rc.local.

# vi /etc/rc.local
aipmng –modupdate –all

Note:
If the Kernel has been updated during the operation of a scheduled backup, an error may occur.

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