Date: Sun, 21 Feb 1999 20:23:59 -0600 From: Dan Nelson <dnelson@emsphone.com> To: Greg Black <gjb@comkey.com.au> Cc: David Kelly <dkelly@hiwaay.net>, Jon Drukman <jsd@gamespot.com>, freebsd-questions@FreeBSD.ORG Subject: Re: tape drive position Message-ID: <19990221202358.A45583@dan.emsphone.com> In-Reply-To: <19990220020117.4326.qmail@alpha.comkey.com.au>; from "Greg Black" on Sat Feb 20 12:01:16 GMT 1999 References: <199902200040.SAA81105@nospam.hiwaay.net> <19990220020117.4326.qmail@alpha.comkey.com.au>
next in thread | previous in thread | raw e-mail | index | archive | help
In the last episode (Feb 20), Greg Black said: > > The only way I know to ID a compressed tape is to put it in a DDS > > drive which doesn't support compression and see what happens. Same > > for Irix and FreeBSD. > > One problem with the method is that, on several BSD variants and with > at least two brands of DDS-1 (no compression) drives, what happens is > a system lockup. This is the only thing (apart from my own > stupidity) that has ever forced me to reboot a BSD system. I've got an old DDS-1 drive that likes locking up on compressed tapes. If I listen to the drive during the "lockup", it sounds like it's retensioning the tape; seeking BOT to EOT and back again over and over. there's nothing BSD can do at this point; the drive is completely unusable. I usually end up having to open the case and unplug the power from the tape drive. The entire machine reboots maybe 1 out 10 times I do this. The other 9 times everything goes back to normal and I can continue using the drive (with a different tape of course :) sa0 at ahc0 bus 0 target 3 lun 0 sa0: <ARCHIVE Python 25947-XXX 2.49> Removable Sequential Access SCSI-2 device sa0: 5.0MB/s transfers (5.0MHz, offset 15) -Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19990221202358.A45583>