IBM E16RMLL-I Implementation Guide - Page 267
Defining a copy storage pool
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Continue Copy on Error?: CRC Data: No Reclamation Type: Threshold tsm: ATLANTIC>update stg diskfile nextstgpool=tapedata ANR2202I Storage pool DISKFILE updated. tsm: ATLANTIC>q stg diskfile Storage Device Estimated Pct Pct High Low Pool Name Class Name Capacity Util Migr Mig Mig Pct Pct DISKFILE SEQF-DC 0.0 M 0.0 0.0 90 70 Next Storage Pool ----------TAPEDATA 6.3.4 Defining a copy storage pool A copy storage pool is used to create copies (backups) of primary storage pools. In our example solution, we have two copy storage pools: OFFDIRS and OFFDATA. Reuse delay The example copy pools have a reuse delay of five days. The reuse delay must expire before empty off-site tape volumes are moved back to the scratch pool. The delay allows for a period of time in which the off-site tapes, even though "empty," may be required for a restore. For example, if your most current off-site backups were destroyed in transit, you may need to restore from a database backup made four days ago. The four-day-old database backup will still reference now-empty tapes, but consider them as having data. The reuse delay allows you to use these tapes even though they are currently considered empty. The reuse delay is especially helpful during a long company shutdown, such as at the end of the year, when the off-site data must remain intact in case a disaster occurs at your main site. You should set the reuse delay equal to the expiry period of your database backups. For example, if you are using DRM and your DRMDBBackupexpiredays is set to 6, or you run delete volhistory type=dbbackup todate=today-6, you should set REUsedelay on the copy storage pools to 6 as well. Chapter 6. Data storage 237
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