Date: Fri, 13 Jun 1997 17:40:08 -0500 From: Tom Jackson <toj@gorilla.net> To: jim@jaguNET.com Cc: Howard Lew <hlew@www2.shoppersnet.com>, freebsd-questions@FreeBSD.ORG, jim@jaquNET.com Subject: Re: FreeBSD-2.2-STABLE and Conner TR4 HyperQIC Message-ID: <19970613174008.46666@peeper.my.domain> In-Reply-To: <199706101759.NAA11141@devsys.jaguNET.com>; from Jim Jagielski on Tue, Jun 10, 1997 at 01:59:20PM -0400 References: <Pine.BSF.3.91.970610100807.23498B-100000@www2.shoppersnet.com> <199706101759.NAA11141@devsys.jaguNET.com>
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On Tue, Jun 10, 1997 at 01:59:20PM -0400, Jim Jagielski wrote: > Howard Lew wrote: > > > > On Tue, 10 Jun 1997, Tom Jackson wrote: > > > > > On Thu, May 29, 1997 at 06:00:08PM -0400, Jim Jagielski wrote: > > > > Awhile ago I had posted that I would test out a new Conner HyperQIC/ > > > > Travan4 tape SCSI tape drive under FreeBSD-2.2-STABLE. I installed > > > > it on Monday and have spent the last few days putting it through > > > > it's paces. It was tested on a Adaptec 2940 and 1522B. > > > > > > > > The Good News: It works solidly and reliably with no changes > > > > required to the kernel. > > > > The Bad News: It ain't that fast. > > > > > > > > Yes, the speed is what I don't like about those Travan devices... and > > don't ever make the mistake of getting the 4 Gig (2.2 uncompressed) Media > > because it holds so much and then deciding to format it because you will > > be surprised how long it takes to complete that task. > > > > Nah... just start the format when you leave the office on Friday > and it might be done by Monday morning :) > Well, this will be my last post on this thread. I had mentioned some concern about the reported density from the Conner/Seagate with TR4 of 0x45. This does not seem to be a problem, but is still not documented. Complete backup of about 4gb went flawlessly. One little thing was the comment in the handbook about doing a `mt fsf 1' at the first of the virgin tape. This causes restore from the first file to be at vol 2 ( you don't need to do this with tr4 tapes). As far as the speed issue. I'm coming from a Colorado Jumbo 250, so this tape drive seems a speed demon to me ;-> My backups went from 261 kb/s to 831 kb/s as reported by dump. According to the handbook, the 4mm 8mm dats run from about 250 to 500 kb/s. I have no experience with a dat but the this seems fairly six to half a dozen. I'm not sure why one would want to format the cartridge (in dos I assume). I guess if you really screwed-up the cartridge, then maybe then. I haven't even installed the dos/w31 s/w. Anyway, I really like the tape drive. Tradeoffs between expensive tr4 carts and short head and tape life with dats I will leave to the bean counters. two taas to you all, Tom
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