3B20 Tapes
Bill.Stewart.<ho95c>
wcs at skep2.ATT.COM
Fri Jul 1 09:00:49 AEST 1988
In article <7600010 at uiucdcsm> carey at uiucdcsm.cs.uiuc.edu writes:
> Does anyone know if a tape written with volcopy on a 3B20 can be
> read by a 3B15? (with volcopy or anything else)
Remember that a volcopy is a physical copy of the blocks in your
filesystem (basically "dd"). This means it will only be readable if
- your tape drive can handle the blocksize (some of the
older tape drives for the 3B5/3B15 couldn't handle
reading large blocks.)
- it fits on the disk slice on the target machine (if the tape is
smaller than the disk, you waste space but it works ok.)
- you're running operating systems with compatible file system
types - I think the 3B20 uses blocks of 512 or 1024,
and the 3B15 uses 512 or 2048 - if the 3B20 tape has
1024-size blocks you may be out of luck. Check out the
superblock headers and fs manual page.
--
# Thanks;
# Bill Stewart, AT&T Bell Labs 2G218, Holmdel NJ 1-201-949-0705 ihnp4!ho95c!wcs
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