I posted:
> I am having problems using dump to backup to a DAT drive. If I use the
> b option to set blocksize to 64 the dump fails, ommiting this option
> it is ok.
>
> Anyone seen this ? The system is running OSF/1 v3.2, the DAT drive is
> a TTi CTS-4410 in TK50Z emulation mode with or without compression.
The problem was using TK50 emulation. This has a maximum block size
of 63K, given in /sys/data/cam_data.c
The TTi drive supports other modes and I have switched to EXB-8200
emulation which supports 64K transfers happily (the native device is
a SONY SDT-5000). I wish to use a 64K block size for speed as the dump
manual page says that b should be "a multiple of 4 and less than 65".
I have had occasional problems from another drive using this emulation, but
this may have been caused by too long scsi cables.
Thanks to those who responded,
"Mark F. Rondinaro" <mfr_at_lns598.lns.cornell.edu>
Martin Frost <me_at_CS.Stanford.EDU>
alan_at_nabeth.cxo.dec.com
jeffvc_at_3do.com (Jeff VanCleave)
Dave Rawlinson <djr_at_star.rl.ac.uk>
"Dr. Tom Blinn, 603-881-0646" <tpb_at_zk3.dec.com>
Dr Blinn recommended the use of vdump.
Paul
+ Paul Collison p.collison1_at_physics.oxford.ac.uk +
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Received on Thu Jun 15 1995 - 15:55:51 NZST