Date: Wed, 28 Apr 1999 20:45:36 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: cjohnson@neunacht.netgsi.com (Christopher T. Johnson) Cc: shocking@prth.pgs.com, current@FreeBSD.ORG Subject: Re: Further on tape & CAM problems Message-ID: <199904281845.UAA01026@yedi.iaf.nl> In-Reply-To: <199904281654.MAA37459@neunacht.netgsi.com> from "Christopher T. Johnson" at "Apr 28, 1999 12:54: 8 pm"
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As Christopher T. Johnson wrote ... > Some extra information on tape problems: > > FreeBSD neunacht.netgsi.com 4.0-CURRENT FreeBSD 4.0-CURRENT #0: Thu Apr 22 > 16:50:33 EDT 1999 root@:/m/src/sys/compile/NEUNACHT i386 > > This is SMP machine with scsi only. > > The tape drive is an EXABYTE-8200. > > When doing tape IO that lasts for an extend period of time the tape drive > will show an amber light. This normally means SCSI activity. At that > point any reads or writes to the device happen at 1.4Mbytes/second when > the max I know that this drive will do is 0.24 Mbytes/second. The drive is speced for 270 kb/sec max IRRC. > We've replaced the tape drive. We've tested with different tapes. > > It LOOKS like the drive is detecting some sort of error and then going > into "toss data mode". This has cost me lots and lots of backups and > is very distressing. Exabyte is not particularly famous for stable firmware. I have a 8200 here and a 4.0-current testbox. No SMP though, a lowly P100 machine. I'll give it a try and report later today. > One interesting data point. When I issue an mt erase command it runs for > a fairly long time. It should runn for just over 2 hours. It gets about > 3/4s of the way and stops. Again with the orange light. The interesting > data point is that four tapes have all stopped at almost the same point. > (Visual inspection of amount of media left on the reels.) I can also try that, but it'll probably take until tomorrow. Groeten / Cheers, | / o / / _ Arnhem, The Netherlands - Powered by FreeBSD - |/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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