User Guide › Expert Restores CMS Files, Minidisks, and SFS Directories › Restoring From a CMSALLOC Backup

Restoring From a CMSALLOC Backup

If your data was backed up in CMSALLOC format, CA VM:Backup displays ** CMS Alloc ** next to the virtual address or directory reference number on the file selection and Select Version of Minidisk or Directory to Restore screens. This descriptor means that the CA VM:Backup system administrator requested a CMSALLOC backup of your minidisk.

When you restore data backed up in CMSALLOC format, follow these guidelines:

• You must restore the entire minidisk.
• You can only restore to a minidisk that belongs to you. You must restore a CKD minidisk to a CKD minidisk, and an FBA minidisk to an FBA minidisk. You must always format minidisks restored from a CMSALLOC backup before restoring data, and the target minidisk must contain the same number of blocks as the source minidisk when formatted at the same blocksize. CA VM:Backup restores each CMS block backed up from the source minidisk (that is, the minidisk from which the data to be restored was originally backed up) to the same location on the target minidisk. You cannot restore minidisks backed up in CMSALLOC format to a virtual reader or directory.
• You can restore only one minidisk in a single request.
• You cannot view or select individual files; although the backup data contains all the files on the minidisk, the data is backed up and cataloged as CMS blocks instead of CMS files.

If you are not sure how to restore the data, contact the CA VM:Backup system administrator.