Date: Wed, 22 Oct 1997 23:47:52 +0100 (MET) From: Wilko Bulte <wilko@yedi.iaf.nl> To: ath@bellcore.com (Andrew Heybey) Cc: scsi@FreeBSD.ORG Subject: Re: NCR 53c810 & DAT tape [Solved?] Message-ID: <199710222247.XAA05424@yedi.iaf.nl> In-Reply-To: <199710221938.PAA00882@grapenuts.bellcore.com> from "Andrew Heybey" at Oct 22, 97 03:38:14 pm
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As Andrew Heybey wrote...
>
> Well, not really solved, but maybe a work-around.
>
> I have the Seagate/Conner/Archive DDS-1 DAT drive (Seagate model
> 4320RT, identifies as "ARCHIVE Python 25501-XXX 5.45") that wedges
> after writing anywhere from a couple to several hundred MB. I poked
> around on the Seagate web site and found a page that suggested that
> their tape drives be run only in asynchronous mode and no faster than
> 5 MB/s.
>
> So first I tried using ncrcontrol to set the drive to be asynchronous
> ("ncrcontrol -t 6 -s async") but that didn't help. Then, grasping at
> straws, I tried changing back to synchronous mode but limiting it to 4
> MB/s ("ncrcontrol -t 6 -s sync=4"). (When initially probed, the drive
> claims to do synchronous at 6.7 MB/s.) I then managed to write a
> whole 60m tape full of zeros (1.3GB) and to do four 300MB dumps in a
> row without wedging (I also read back two of the dumps), so this may
> have done it.
>
> Any thoughts on whether there is any logical explanation as to why
Hmm, would not be the last firmware bug from Archive origin...
Talk to people with early Archive Vipers.
_ ____________________________________________________________________
| / o / / _ Bulte email: wilko@yedi.iaf.nl http://www.tcja.nl/~wilko
|/|/ / / /( (_) Arnhem, The Netherlands - Do, or do not. There is no 'try'
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