Sun tape drive question
Vidiot
nicmad!ftms!brown%astroatc.UUCP at cs.wisc.edu
Wed Aug 8 05:17:40 AEST 1990
OK, bear (or bare:-) with me on this question. First some details.
I have a Sun 3/60 with a SCSI tape drive, for writing QIC-11 and QIC-24
tapes. While doing dumps, I set the footage size for thge OS3.5 dump to
"feet * 9 * .9", the magical formula used for the s option. Everything
works just fine.
On the 4/110 that we just brought in, the Sun OS4.1 dump is different, in
that real footage numbers are used, not the calculated stuff of 3.5. So,
I tell dump to use 600 feet, but dump fails and gives a write error at
footage 4946. Wait-a-minute, using the old formula that is 610 feet. I
am using the DEI 5 FIFTY 5 cartridges, which works ok when using a value
of 5100, under OS3.5.
The dump will only work when I use a value of 500 for the footage. 525
fails. Does anyone know what is really going on in the 4.1 dump? What is
a QIC-24 tape really supposed to hold? It estimated a dump of 104.54MB,
which should not spill into a third tape, but it does. At 60MB a tape,
the dump should have fit onto two tapes. Am I way off base here?
Please e-mail responses.
Thanks in advance.
Mike Brown
harvard\ att\
ucbvax!uwvax!astroatc!nicmad!ftms!brown
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