6 Mar
2013
6 Mar
'13
12:38 p.m.
On 03/06/2013 12:17 PM, Richard wrote:
So what do you recommend instead of dd?
I don't--I haven't seen anything that preserves all of the aspects of a
tape image yet. See the message just before this one.
Also, this discussion hasn't yet specifically
stated, but I assume
we're talking about 9-track tapes here.
Don't 7- and 18- track tapes count? There were certainly enough of them
produced.
Do the same issues apply to QIC DC300 tapes?
It varies--a Cipher 525 uses a very different recording format than,
say, a Wangtek drive with the same capacity. And there are a lot of
tape formats that are sui generis--Datasonix Pereos, for example, where
the tape format was never made public.
What about DC100 (mini-QIC) tapes?
There are also 20MB DC-1000 mini-QICs (Irwin made most of those drives).
Even among QIC, there are 2- 4- 11- and "lotsa" track drives.
Generally, on QIC, DLT, DDS and 8mm units that offered SCSI
compatibility, there is fairly broad conformance with ANSI standards,
given that SCSI provides a basic set of standard tape manipulation commands.
--Chuck