frank@rsoft.bc.ca (Frank I. Reiter) (03/21/90)
We recently upgraded from an Archive FT60 tape drive to a VP150 150 meg tape
drive. Because we often backup more than 60 megs at a time we were using
backup ufsd0 /dev/erct0 600 20000
to backup onto multiple 60 meg tapes. I thought that for the meantime I
would just double the density to 40000 but when I tried it backup said it
was ready to backup 300 megs onto 2 tapes (150 megs each, I was trying to
specify 120 megs each as I am not using the longer tapes required to write
150 megs) and, as expected, the backup aborted with a write error after about
130 megs.
QUESTION 1: What s and d parameters will give me 125 megs on a tape?
backup didn't seem to want to cooperate with me so I tuned to tar and used
"k 125000" to tell it where to stop. It prompted for the new tape right on
schedule but aborted with "Unable to reopen /dev/erct0" when I typed a CR.
Digging farther I found that current versions of backup also recognize a k
parameter so I tried backup again with k 125000.
This time backup got the size correct, but also did this:
Please insert new volume, then press <RETURN>:
backup: cannot create /dev/erct0
Please check the drive, then press <RETURN>:
Pressing return a second time worked fine. The same thing occured on tape 3.
QUESTION 2: Is this normal? Is this related to "k" indicating a block device?
--
_____________________________________________________________________________
Frank I. Reiter UUCP: {uunet,ubc-cs}!van-bc!rsoft!frank
Reiter Software Inc. frank@rsoft.bc.ca, a2@mindlink.UUCP
Surrey, British Columbia BBS: Mind Link @ (604)576-1214, login as Guest