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Date: Tue, 20 Jan 1998 08:57:10 -0800
From: Eric Hedstrom <erich@compecon.com>
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To: vrtin@uni-mb.si
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Subject: Re: dump: end-of-media indication? (dat, crash)
References: <199801191438.PAA21914@unicorn.uni-mb.si>
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Yes, DDS DAT drives work well with the -a option in my experience.

David Vrtin wrote:
> 
> Hello
> 
> >From "man dump":
> 
>      -a      ``auto-size''. Bypass all tape length considerations, and enforce
>              writing until an end-of-media indication is returned.  This fits
>              best for most modern tape drives.  Use of this option is particu-
>              larly recommended when appending to an existing tape, or using a
>              tape drive with hardware compression (where you can never be sure
>              about the compression ratio).
> 
> I have Sony DDS DG90M (90m/295feet) data carttridge and:
> 
>         (ncr0:6:0): "ARCHIVE Python 28388-XXX 5.45" type 1 removable SCSI 2
>         st0(ncr0:6:0): Sequential-Access
>         st0(ncr0:6:0): 6.7 MB/s (150 ns, offset 8)
>         density code 0x13,  drive empty
> 
> Do I have "modern tape driver" or not? :-)
> 
>         # mt rewind
>         # printenv TAPE
>         /dev/tape
>         # ls -la /dev/tape
>         lrwxrwxrwx  1 root  wheel  5 Apr 15  1997 /dev/tape -> nrst0
>         # dump -0au /u
>         [...]
>           DUMP: 63.53% done, finished in 0:37
>           DUMP: 68.49% done, finished in 0:32
>           DUMP: 74.53% done, finished in 0:25
>           DUMP: 79.67% done, finished in 0:20
>           DUMP: 82.92% done, finished in 0:17
>           DUMP: write error 1773020 blocks into volume 1
>           DUMP: Do you want to restart?: ("yes" or "no") no
>           DUMP: "Yes" or "No"?
>           DUMP: Do you want to restart?: ("yes" or "no") no
>           DUMP: The ENTIRE dump is aborted.
> 
> On console:
> 
>         ncr0: SCSI phase error fixup: CCB already dequeued (0xf0940400)
>         ncr0: timeout ccb=f0940800 (skip)
>         ncr0: timeout ccb=f0940400 (skip)
>         ncr0: timeout ccb=f0940000 (skip)
> 
> Box freezes, hand reset.... :( I have 2.2.5-STABLE from 11. jan. 1998.
> 
> Thanks for any help,
> David
> 
> --
>   David Vrtin (system manager)                 #  tel: +386 62 220-7129
>   University of Maribor, Faculty of EE and CS  #  fax: +386 62  211-178
>   Smetanova 17, SI-2000 Maribor, Slovenia      #  www.uni-mb.si/~david/