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Full Discussion: vxdump with more tapes
Operating Systems Solaris vxdump with more tapes Post 302286551 by cy1972 on Wednesday 11th of February 2009 12:25:32 PM
Old 02-11-2009
Hello,

I've never done it but according to some old documentation I have, vxdump will request a second volume when the first one completes. It would appear you can use the -n option in your vxdump command to get the system to display a message requesting you load the second tape in the drive when it reaches the end of the first tape. Your backup will then complete over the two volumes.

Extract from the documentation below explaining in more detail:
vxdump(1M)Operator interaction

vxdump requires operator intervention for any of the following conditions:
  • end of tape
  • end of dump
  • tape-write error
  • tape-open error
  • disk-read error (if errors exceed threshold of 32)
In addition to alerting all operators implied by the -n option, vxdump interacts with the control terminal operator by posing questions requiring yes or no answers when it can no longer proceed or if something is grossly wrong.
Since making a full dump involves considerable time and effort, vxdump establishes a checkpoint at the start of each tape volume. If, for any reason, writing that volume fails, vxdump will, with operator permission, restart from the checkpoint after the old tape has been rewound and removed and a new tape has been mounted.

Hope this helps.
 

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TAPELIST(5)						   File formats and conventions 					       TAPELIST(5)

NAME
tapelist - The list of Amanda volumes in use DESCRIPTION
The tapelist file contains the list of tapes in active use. This file is not ordinarily ordinarily edited or examined manually. Its format may change, or it may be removed altogether, in future versions of Amanda. It contains lines of the form: YYYYMMDD label flags [BARCODE:barcode] [META:meta] [BLOCKSIZE:blocksize] [#comment] Where YYYYMMDD is the date the tape was written, label is a label for the tape as written by amlabel and flags is one of "reuse" or "no-reuse" and tells Amanda whether the tape may be reused. A non-reusable tape will not be overwritten, even if it is older than dumpcycle dumps. See the reuse options of amadmin(8). The optional barcode is prefixed with 'BARCODE' if the volume have a barcode. The optional meta label is prefixed with 'META' if the volume is on a meta volume. The optional blocksize is prefixed with 'BLOCKSIZE'. The optional comment is prefixed with a '#' and continues to the end of the line. Amanda will maintain this comment until the tape is overwritten. Note that comments are not allowed on blank lines. The file is sorted such that the most-recently used tape appears on the first line, and the oldest tape appears on the last line. Amdump and amflush will by default refuse to write to an unlabeled tape, or to a labeled tape that is considered active or marked "no-reuse". There must be more tapes in active rotation (see the tapecycle option) than there are runs in the backup cycle (see the dumpcycle option) to prevent overwriting a backup image that would be needed to do a full recovery. SEE ALSO
amanda(8), amanda.conf(5) The Amanda Wiki: : http://wiki.zmanda.com/ AUTHORS
James da Silva <jds@amanda.org> Stefan G. Weichinger <sgw@amanda.org> Dustin J. Mitchell <dustin@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Amanda 3.3.3 01/10/2013 TAPELIST(5)
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