Date: Thu, 4 Apr 1996 15:07:20 -0500 (EST) From: "matthew c. mead" <mmead@Glock.COM> To: rjk@sparcmill.grauel.com (Richard J Kuhns) Cc: joerg_wunsch@uriah.heep.sax.de, freebsd-scsi@freebsd.org, jmb@freefall.freebsd.org, daves@bev.net Subject: Re: Archive Anaconda Tape drive 1.35GB && Adaptec 1542CF Message-ID: <199604042007.PAA10079@neon.Glock.COM> In-Reply-To: <199604041953.OAA29313@sparcmill.grauel.com> from "Richard J Kuhns" at Apr 4, 96 02:53:10 pm
next in thread | previous in thread | raw e-mail | index | archive | help
Richard J Kuhns writes: > matthew c. mead writes: > > mmead writes: > > Well, I got the drive in last night, and played with it > > both under FreeBSD-current and FreeBSD 2.1.0R. Under 2.1.0R it > > probes as such: > > (ncr0:1:0): "ARCHIVE ANCDA 2750 28077 -003" type 1 removable SCSI 1 > Jonathan Bresler posted a great writeup on his experiences with this drive; > here's an extract: > +++ > The drive is advertised as a SCSI-2 drive. FreeBSD reports the drive as > SCSI-1. Installing jumper jp6 causes FreeBSD to report the drive as SCSI-2. WHOA! The little instruction sheet says that jp6 is reserved. How did you figure this out? > When operating as a SCSI-1 device (jp6 open) the drive does not > conform to SCSI-1. The drive "locks" the scsi bus during at least > some mt operations (eg fsf, rewind, rewoffl). Hmm. I don't know if it was locking the scsi bus or not. I did do some of each fsf, rewind, and rewoffl, but never tried to access the other device on the SCSI bus at the same time. > When operating as a SCSI-2 device (jp6 shorted) the drive does not > lock the scsi bus during the operations listed above. However to > get the ncr working with /sbin/dump, the ncr requires a patch > extending the latetime from 10 secs to a larger value. presently > i am using 20 minutes. ;( but it works and its fast! it does > not lock the bus while the dump is being written to tape. > +++ Hmm. Has this patch been incorporated into -current or will I need to go hunting and find this? Any suggestions on files (prolly ncr*)? Is the 20 minutes based on anything like how long it takes to dump 1.3G to the tape drive? > > Once I got the active termination problems out of the way > > it's been working excellently (except for maybe requiring me to > > mt -f /dev/nrst0 fsf 2 for each file instead of mt -f /dev/nrst0 fsf 1. > Interesting; is your controller an Adaptec? No: (ncr0:1:0): "ARCHIVE ANCDA 2750 28077 -003" type 1 removable SCSI 1 ^^^^ It's an NCR 810. However, it seemed to work fine with an Adaptec 2940 under FreeBSD-current. > > I did realize after putting this tape drive in my system > > that it is a SCSI-I drive. Will this cause my entire SCSI bus > > that tape drive is connected to to function as a SCSI 1 bus, or > > does my SCSI-IIF drive on that bus still have the advantages of > > SCSI-IIF??? Thanks for any information! I'm still a little curious about this... anyone know? -matt -- Matthew C. Mead mmead@Glock.COM http://www.Glock.COM/~mmead/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199604042007.PAA10079>