Date: Sat, 11 Dec 1999 16:28:28 -0800 From: Randy Bush <randy@psg.com> To: freebsd-scsi@freebsd.org Subject: filemarks? Message-ID: <E11wwsG-0001fn-00@rip.psg.com>
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freebsd 3.3-stable of 99.11.5
ncr0: <ncr 53c815 fast10 scsi> rev 0x04 int a irq 10 on pci0.20.0
sa0 at ncr0 bus 0 target 0 lun 0
sa0: <HP HP35480A T503> Removable Sequential Access SCSI-2 device
sa0: 5.000MB/s transfers (5.000MHz, offset 8)
if a dump is taken with
/usr/bin/mt -f /dev/rsa0 rewind
/sbin/dump 0uaf /dev/nrsa0 /dev/wd0s2a
/sbin/dump 0uaf /dev/nrsa0 /dev/wd0s2e
/sbin/dump 0uaf /dev/nrsa0 /dev/wd0s2f
/sbin/dump 0uaf /dev/nrsa0 /dev/wd0s1
/usr/bin/mt -f /dev/rsa0 rewind
i expect five files to be written to the tape. but, if i issue
/usr/bin/mt -f /dev/rsa0 fsf 2
the tape fast forwards all the way to the end, pauses, then fast rewinds
to the beginning and barfs
# /usr/bin/mt -f /dev/rsa0 fsf 2
mt: /dev/rsa0: fsf: Input/output error
i know that it is a full rewind because if i then issue
/sbin/restore -if /dev/rsa0
i see the first file system as opposed to the third.
i get the same result with
/usr/bin/mt -f /dev/rsa0 rewind
/sbin/restore -if /dev/rsa0 -s 2
i can actually get the five 'files' by
for i in 1 2 3 4 5; do
/bin/dd if=/dev/nrsa0 bs=64k of=tape%i
done
and then see each of the files properly with restore.
what am i misunderstanding here?
randy
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