Storage pool problems

Storage pool problems might include the following:

• Unexpected events. Many problems described here are often side effects of various infrequent or uncommon events. Such events include network failures, system crashes, failed or aborted cleanup operations, operating system bugs, disk failure, network reconfiguration events, and so on. Another class of events includes accidental or malicious delete, move, rename, or change-protection operations on containers. These are all varieties of unexpected events.
• Major and minor problems. The summary output from checkvob records the number of major and minor problems detected. Bad pool roots and missing data containers (source or DO pools) are considered major problems. All others are considered minor.
• Reference times. A pool or VOB database’s reference time is the point at which VOB activity was last recorded there. This can be the current time, the time when an operational VOB was locked, or the time when a snapshot or backup operation captured the pool or database. Expected output and fix processing from checkvob varies markedly depending on the relative reference times on the VOB database and storage pools being compared. There are three general cases:
  • The database is newer than the pools.
  • The pools are newer than the database.
  • The database and storage pools are synchronized: they are both current, or they were retrieved as a unit from a complete backup of the VOB storage directory.