ADIC 5.4 manual x Turns on SCSI debugging

•-xTurns on SCSI debugging.

•-jDirects the medialist command to jukebox ID rather than the default of 1.

•Network Attached Libraries—Enhancements to the network attached library interface include:

•Reducing the number of 'query drive' commands thus softening the load on the XDI interface. A function to test the need to inquire about library drive status is added. If there are no drive candidates to service a pending IO request, the library query drive command is not called. This will reduce the load on the network library interface.

•Releasing the shared memory semaphore across the library query drive command. Failure to do this will cause the entire AMASS system to lock up should a query drive command fail to complete (is hung).

•Adding a feature that will time out a hung XDI command. This happens frequently in the presence of library errors.

•Adding XDI failed mount/dismount retry option. XDI failed mounts and dismounts are retried 3 times before a drive/volume are taken out of service.

The combination of these four fixes will prevent AMASS from locking up and loosing drive/volume resource in the presence of library errors.

This new functionality is controlled by using the following environmental variables:

•AMASS_DISABLE_TEST_DRIVE - should the reduction in queries to the drive cause undesired effects, this environmental variable will return AMASS to pre-fix default state that continually pings the library interface.

•AMASS_DRIVESTAT_TIMEOUT=<new_val_in_seconds> - changes query drive time out from the default of 10 seconds to the value specified here.

•AMASS_STORE_TIMEOUT=<new_val_in_seconds> - changes the library mount/dismount timeout from a default 360 seconds to the value specified here.

•AMASS_DISABLE_LIBTIMEOUT - should the library timeout feature cause undesired effects, this environment variable will disable the feature.

Note	These environmental variables can be set in the shell in which AMASS is
	started or put directly in the amass_start script.

•vgimport—Importing and exporting large volume groups is expedited with the -qoption.

Usage: vgimport [-yun] [-p path] [-v volumenumber(s) -or- -f volume_list_file] filename; where:

•-q quick; Do not verify NSR label against volume.

•-ySuppress questions and informational messages.

•-uPrints this usage message.

•-nParses the metadata file, but does not update the database.

•-p path Specifies volume group root directory name.

•-v volumenumber Specifies import volume number(s) (# #,# #-#).

•-f volume_list_file Obtains volumes from input file (one volume per file line).

•volstat—New command line options have been added to this tool. The volstat command options now include:

Usage: volstat [-aifFsuy] <volume-number>; where:

• -aChanges volume status to active.

4 © December 2004, ADIC