Date: Sat, 12 Oct 1996 20:53:21 -0700 (PDT) From: "Jonathan M. Bresler" <jmb> To: dkelly@hiwaay.net (David Kelly) Cc: questions@freebsd.org Subject: Re: Busy Tape Drive? Message-ID: <199610130353.UAA00124@freefall.freebsd.org> In-Reply-To: <XFMail.961012174652.dkelly@hiwaay.net> from "David Kelly" at Oct 12, 96 05:34:00 pm
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David Kelly wrote: > > Related section of dmesg output: > ahc0 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 11 on pci0:6 > ahc0: aic7870 Single Channel, SCSI Id=7, 16 SCBs > ahc0 waiting for scsi devices to settle > (ahc0:0:0): "SEAGATE ST32550N 0021" type 0 fixed SCSI 2 > sd0(ahc0:0:0): Direct-Access 2047MB (4194058 512 byte sectors) > (ahc0:6:0): "ARCHIVE ANCDA 2750 28077 -003" type 1 removable SCSI 2 > st0(ahc0:6:0): Sequential-Access density code 0x0, drive empty > > The 2940 is an older model, BIOS rev 1.10 or thereabouts (heard > there was a hardware rev for BIOS 1.16). The Anaconda tape drive > (1.35G QIC) is being used with a jumper set that was "reserved" > in the supplied documentation but others on this list said it > would cause the drive to run in SCSI 2 mode, and it does. Was > also said the tape drive would disconnect while processing > commands. the drive stops responding toi scsi bus input during some operations that "take a long time" to complete. i use an anaconda with the ncr scsi controller under freebsd 2.15 an d now 2.2-current. i had to lenghten a timeout value in /sys/pci/ncr.c (thanks to stefan esser for working this out for me ;) you may have to change the Adaptec 2940 driver as well the timeout was changed from 4 to 1200 (units are 2 second intervalss, i believe). take a look at line 4832 in /sys/pci/ncr.c version 1.78 jmb -- Jonathan M. Bresler FreeBSD Postmaster jmb@FreeBSD.ORG FreeBSD--4.4BSD Unix for PC clones, source included. http://www.freebsd.org/ PGP 2.6.2 Fingerprint: 31 57 41 56 06 C1 40 13 C5 1C E3 E5 DC 62 0E FB
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