[comp.sys.mac] Tape Backup = 40meg?

chris@cayman.COM (Chris North) (07/25/89)

I am using Apple's Tape Backup unit to back up my SE/30's 40 meg drive.  
Even if my hard drive has 10 meg free, I still have to use a second
tape.  Are these tapes really 40 meg or is someone pulling my leg?

-- 
Chris North                                chris@cayman.COM
Cayman Systems
26 Landsdowne Street
Cambridge MA  02139                        617-494-1999

cy@dbase.UUCP (Cy Shuster) (07/28/89)

Hi, Chris!  Long ago I read somewhere that Apple Tape Backup writes each
record out 3 times, for some reason (to ensure a restore in case of tape
failures?)  But this is only a Genuine Net Rumor, and should be given only
such credence as any other.

I do know, however, that under Apple Tape Backup prior to version 2.0.1,
I was unable to restore a "volume" backup to any other drive! My internal
80 died, and I could not restore the tape to any other internal 80 in our
shop.

I don't know if this has been fixed in the current release: has anyone had
more recent experience?

--Cy--

ziggy+@andrew.cmu.edu (John Salmento) (07/30/89)

I had a similar problem with apple's tape backup program.   I had a mass
micro drive partitioned into 4 volumes.  I
did a volume backup.  Then I reformatted the drives with SilverLining by
LaCie, with the same sizes.  Then I tried to restore the volumes but the
backup software only recognized the system volume and refuse to backup
up the other volumes.  So I had to reinstall the mass micro drivers and
partitioning software!!  What a pain!!

Just recently, I tried to backup another disk with SilverLining
installed, and the tape backup software only recognized the system
volume.  I think I'm going to pitch apple's backup software if I can't
find a fix soon.

John Salmento
Carnegie-Mellon University
ziggy+@andrew.cmu.edu