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TAKE - xfsdump/xfsrestore document -q QIC tape option

To: linux-xfs@xxxxxxxxxxx
Subject: TAKE - xfsdump/xfsrestore document -q QIC tape option
From: Ivan Rayner <ivanr@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 5 Feb 2002 15:29:23 +1100 (EST)
Sender: owner-linux-xfs@xxxxxxxxxxx
The -q option tells xfsdump/xfsrestore that the tape is a QIC tape. QIC tapes
use only 512 byte blocksizes, so xfsdump/xfsrestore need to make special
allowances for this.

This is a Linux only option.  On IRIX, xfsdump/xfsrestore are able to
automatically detect QIC tapes.

If you get messages like:

  xfsdump: unable to set block size to 1048576

or try to specify a 512 byte blocksize with -b, and then get an assertion
error like:

  xfsdump: drive_scsitape.c:1985: do_get_write_buf: Assertion 
`contextp->dc_nextp < contextp->dc_recendp' failed.

then you _might_ have a QIC tape that requires this option.  This option
has been in the Linux xfsdump/xfsrestore since the initial port, but hasn't
been documented.


Thanks to Mike Burger for bringing this to our attention.

Ivan


Date:  Mon Feb  4 20:19:14 PST 2002
Workarea:  snort.melbourne.sgi.com:/home/ivanr/isms/2.4.x-xfs

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  xfs-cmds:slinx:110998a
cmd/xfsdump/doc/CHANGES - 1.33
cmd/xfsdump/man/man8/xfsrestore.8 - 1.9
cmd/xfsdump/man/man8/xfsdump.8 - 1.11
cmd/xfsdump/common/main.c - 1.18
                    - document -q QIC tape option


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