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The command vos examine is used to find out general information about a volume. This information includes the volume identification number of the volume itself, as well as the volume identification number of the backup and read-only volumes associated with it (if they exist). It also tells what server the volume is located on and when the volume has last been released or backed up. In addition, it tells you when the volume was last changed, and what the maximum quota of the volume is. Here is an example:
athena% vos examine user.autumn user.autumn 536956932 RW 2077 K On-line CIRCE.MIT.EDU /vicepa Parent 536956932 Clone 0 Backup 536956934 MaxQuota 5000 K Creation Fri May 22 15:52:21 1992 Last Update Fri Jun 26 15:42:15 1992 1539 accesses in the past day readWriteID 536956932 valid readOnlyID 0 invalid backUpID 536956934 valid number of sites -> 1 server CIRCE.MIT.EDU partition /vicepa RW SiteSuppose I want to know when my account was last backed up. I can use the same command on user.autumn.backup to find out:
athena% vos examine user.autumn.backup user.autumn.backup 536956934 BK 2087 K On-line CIRCE.MIT.EDU /vicepa Parent 536956932 Clone 0 Backup 536956934 MaxQuota 5000 K Creation Sun Jun 28 23:03:11 1992 Last Update Sun Jun 28 23:03:11 1992 0 accesses in the past day readWriteID 536956932 valid readOnlyID 0 invalid backUpID 536956934 valid number of sites -> 1 server CIRCE.MIT.EDU partition /vicepa RW SiteThis tells me that my backup volume was last updated on Sunday, June 28.
Another useful command is vos listvldb. In the form fs listvldb -name volumename (where volumename is the name of the volume in the form given by fs lsm), this command will tell you what server the volume volumename is on (among other things), even if that server is down.
For more information on the command vos, you can type man vos at the athena% prompt.