From owner-freebsd-scsi Sat Mar 13 3:43:37 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from ren.detir.qld.gov.au (ns.detir.qld.gov.au [203.46.81.66]) by hub.freebsd.org (Postfix) with ESMTP id 1173C14C2A for ; Sat, 13 Mar 1999 03:43:33 -0800 (PST) (envelope-from syssgm@detir.qld.gov.au) Received: by ren.detir.qld.gov.au; id VAA19400; Sat, 13 Mar 1999 21:43:06 +1000 (EST) Received: from ogre.detir.qld.gov.au(167.123.8.3) by ren.detir.qld.gov.au via smap (3.2) id xma019395; Sat, 13 Mar 99 21:42:49 +1000 Received: from atlas.detir.qld.gov.au (atlas.detir.qld.gov.au [167.123.8.9]) by ogre.detir.qld.gov.au (8.8.8/8.8.7) with ESMTP id VAA18511; Sat, 13 Mar 1999 21:42:49 +1000 (EST) Received: from nymph.detir.qld.gov.au (nymph.detir.qld.gov.au [167.123.10.10]) by atlas.detir.qld.gov.au (8.8.5/8.8.5) with ESMTP id VAA28310; Sat, 13 Mar 1999 21:42:48 +1000 (EST) Received: from nymph.detir.qld.gov.au (localhost.detir.qld.gov.au [127.0.0.1]) by nymph.detir.qld.gov.au (8.8.8/8.8.7) with ESMTP id VAA24110; Sat, 13 Mar 1999 21:42:47 +1000 (EST) (envelope-from syssgm@nymph.detir.qld.gov.au) Message-Id: <199903131142.VAA24110@nymph.detir.qld.gov.au> To: mjacob@feral.com Cc: freebsd-scsi@FreeBSD.ORG, syssgm@detir.qld.gov.au Subject: Re: Strange SCSI QIC tape behaviour References: In-Reply-To: from Matthew Jacob at "Fri, 12 Mar 1999 08:39:59 -0800" Date: Sat, 13 Mar 1999 21:42:46 +1000 From: Stephen McKay Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Friday, 12th March 1999, Matthew Jacob wrote: >> So, is this the most bizarre drive on Earth, or perhaps are there bugs in >> the SCSI tape driver that need addressing? At the very least, the fixed >> block size for QIC tapes should be 1024 not 512 for densities above QIC-320. > >Yes, that's a bug for me to address. Where is this piece of information >from? Jörg described the situation quite well. But if you want to see Tandberg's view on it, read http://www.tandberg.com/download/manuals/42304206.pdf. It looks quite detailed and comprehensive. For the rest of their QIC info try http://www.tandberg.com/slr/slr_docs.html. So, do you think the other problems I raised are possible bugs, or simply drive quirks? For example, if I read a fixed blocked tape in variable block mode it works (a bit of a surprise) but is very slow. When I tell it to use fixed blocks (1024 bytes) it works at full speed. The driver never works it out for itself. Stephen. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message