[comp.unix.sysv386] Tape backup for ISC Unix

dbullis@cognos.UUCP (Dave Bullis) (04/04/91)

I am looking for a tape backup for my ISC2.2 system.  Currently I have
	DTK 2500 Motherboard, 4Mb
	WD1007WA2
	Miniscribe 8380E

I am looking for something to handle from 60 to 150Mb and the options
seem to be
	floppy tape (ie. CMS Jumbo)
	QIC (Wangtec, Archive...)

The good thing about the floppy tapes is price,
The bad things are:
      1)The 1007WA2 controller has a timing problem which causes problems
	with the CMS Jumbo.
      2)ISC's floppy tape driver is broken and you need CMS's drivers.
      3)Too many horror stories on the net and too few testimonials.
The first 2 points (from CMS tech support) blow the price benefit,
and the last gives me the chills.

So...

Is anyone using high-capacity floppy tapes and are happy?  Is it reliable?

Any recommendations for QIC drives?
My experience is that QIC 60Mb tapes are interchangable between machines,
is this generally true?  how about 150Mb tapes?
It used to be that 150Mb tape could read but not write 60Mb tapes,
is this still true?
Is SCSI-based versus separate controller (ie.SC499) an issue? How about cost?

In general, can anyone compare the reliability of floppy tapes vs. QIC tapes?
How about 60Mb QIC vs. 150Mb QIC? 
-- 
Dave Bullis        Cognos, Inc     VOICE: (613) 738-1440 FAX: (613) 738-0002
3755 Riverside Dr. P.O. Box 9707    WORK: uunet!mitel!cunews!cognos!dbullis
Ottawa, Ontario,   CANADA  K1G 3Z4  HOME: dave@sillub.ocunix.on.ca
"I didn't know the terminals were haunted.  The salesman didn't tell us."

cpcahil@virtech.uucp (Conor P. Cahill) (04/07/91)

dbullis@cognos.UUCP (Dave Bullis) writes:


>My experience is that QIC 60Mb tapes are interchangable between machines,
>is this generally true?  how about 150Mb tapes?

Both are interchangable between systems that have QIC tape drives 
at similar capacities (except HP systems, of course - they use a proprietary
format).   You may run into problems if you want to take a 150MB tape 
and read it on a 60MB drive.

>It used to be that 150Mb tape could read but not write 60Mb tapes,
>is this still true?

QIC-150 tape drives will write DC600A tapes in QIC-120 format (120MB) that
can be read on most other QIC 150 drives, but not on QIC-60 drives.

>Is SCSI-based versus separate controller (ie.SC499) an issue? How about cost?

Usually the only difference is the slot the separate controller will take up.

-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170