🚀 go-pugleaf

In article <213600004@s.cs.uiuc.edu> silver@s.cs.uiuc.edu writes:

silver> Nf-ID: #R:nmtsun.nmt.edu:3425:s.cs.uiuc.edu:213600004:000:731
silver> Nf-From: s.cs.uiuc.edu!silver    Nov  2 17:32:00 1989
silver>
silver> Re: 6157-002 tape drives being slow
silver>
silver> Yes, I agree they aren't speed-demons, but I have obtained a tremendous
silver> speedup with buffering.  The daily backups we make (5-8Meg) take
silver> only 4-5 minutes.  The fulldumps (200+Meg) take only 75-80 minutes.
silver> That's not including the time to switch between the 4 tapes it requires.
silver>
silver> All we changed in the cpio (daily) or backup (fulldump) calls was to
silver> include -C2000 for a block/buffer size of 1 Meg.  We have 12 Meg. of
silver> real memory, so page-faulting is not much of a problem.
silver>
silver> As far as reading -001 tapes on a -002, I'd like to answer to that
silver> if anyone ever discovers one.

One could always read -001 tapes on a -002 drive.  I think the original
question was about `writing' -001 tapes on the -002.  Unfortunately the
answer would appear to be no.  This is on AOS where I have looked at the
sources for the device driver.  There is not even a hint ob being able to do
this.

silver> All of this is from a RT/125 with 3x310 Meg disks (mostly empty).
silver>
silver> Edward A. Silverstein
silver> silver@director.beckman.uiuc.edu
--
Dan Ehrlich <ehrlich@cs.psu.edu>
"A message is not a message until the rules for interpreting it
 are in the hands of the receiver." --Apollo Belvedere Smith