IBM E16RMLL-I Implementation Guide - Page 474
Reusing backup tapes
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ANR8438I CHECKOUT LIBVOLUME for volume 046AKK in library 3582SHARED completed successfully. ANR0985I Process 17 for CHECKOUT LIBVOLUME running in the BACKGROUND completed with completion state SUCCESS at 18:07:40. Move volumes off-site You should move the backup volumes to your off-site location. We recommend that you track the tapes in a movement log. Reusing backup tapes You should keep a minimum of three days of database backup tapes. If you want to allow for holiday weekends, then a larger number, such as four or five, may be more appropriate. Our book environment uses five tapes. The steps that you need to perform to reuse database backup tapes are: 1. Identify the volumes to be brought on-site. 2. Move the tape volumes from off-site to on-site. 3. Update the volume to scratch. 4. Check storage volumes in to a library. Identify the volumes to be brought on-site Database backups remain active until their entry is deleted from the volume history. However, once it has been deleted, Tivoli Storage Manager has no knowledge of the volume at all. As there is no way to display just the oldest database backup volumes, we use the query volhistory command to identify all tape volumes containing database backups older than a specific number of days. The volumes you require are those with the oldest time stamp. The command shown in Example 13-44 uses nine days. Example 13-44 Query for dbbackup volumes in the past nine days tsm: ATLANTIC> query volhistory type=dbbackup enddate=today-9 Date/Time: 02/13/06 16:03:24 Volume Type: BACKUPFULL Backup Series: 17 Backup Operation: 0 Volume Seq: 1 Device Class: LTO2 Volume Name: 023AKK Volume Location: Command: 444 IBM Tivoli Storage Manager Implementation Guide
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