STORE and TurboSTORE/iX Products Manual (B5151-90003)

132 Chapter7

TurboSTORE/iX 7x24 True-Online Backup

Restoring TurboSTORE/iX 7x24 True-Online Backups

This section discusses the options available for restoring backups created by

TurboSTORE/iX 7x24 True-Online Backup.

When restoring a backup that was created with the sync point at the beginning of the

backup, RESTORE performs the following tasks for each ﬁle restored:

1. Restores the initial ﬁle data.

2. Applies any before image log data that exists on the backup.

When a 7x24 true-online backup with the sync point at the end of the backup is restored,

RESTORE performs the following tasks:

1. Restores the initially stored ﬁles.

2. Restores all new ﬁles that were added to the ﬁleset during the backup due to renames

or builds.

3. Applies any changes made to ﬁles after they were written to the media (the after image

logs).

4. Does not restore all ﬁles that were deleted from the ﬁleset during the backup.

If RESTORE is unable to read the media directory information from a media directory disk

ﬁle, it asks you to mount the last piece of media from the backup. Once it has read the

media directory, it prompts you to mount the necessary piece(s) of media for the recovery

process.

NOTE

Since the after image log data is stored at the end of the backup, ﬁles that

need to have after image log data applied is unavailable for read OR write

access, until the after image log data is applied at the end of the backup. Once

RESTORE reads and applies the after image log data for a ﬁle, the ﬁle can be

accessed again.

Restoring with a Disk Directory File (STOREDIRECTORY)

When restoring ﬁles, RESTORE ﬁrst reads in the Store labels from the devices speciﬁed

either in the restoreﬁle parameter, or in the RESTORESET option. It then opens the

appropriate media directory disk ﬁle, if one exists. This allows RESTORE to more efﬁciently

restore ﬁles. The greatest advantage occurs when selectively restoring ﬁles from many

tapes, or if the backup was created with the sync point at the end.

Selective restores can be optimized further by specifying the disk directory ﬁlename with

the STOREDIR[ECTORY] option. If you speciﬁed a name for the backup at Store time with

the STOREDIRECTORY option, that name can also be speciﬁed here. Alternately, you can

specify the full HFS directory disk ﬁle created by STORE.