Date: Sat, 24 May 1997 17:03:45 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: brandon@cold.org (Brandon Gillespie) Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: Wang DAT SCSI drive woes Message-ID: <199705240733.RAA05396@genesis.atrad.adelaide.edu.au> In-Reply-To: <Pine.NEB.3.95.970523101432.6847E-100000@cold.org> from Brandon Gillespie at "May 23, 97 10:15:19 am"
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Brandon Gillespie stands accused of saying: > > Has anybody ever wrestled with a Wang DAT SCSI drive? I just dropped one > in my FreeBSD box. I have used Exabytes before, but never a Wang DAT. > This one is on SCSI ID 6, and shows up in the boot probes as: Yeah, I have a couple. > aic0 at 0x340-0x35f irq 11 on isa > aic0 waiting for scsi devices to settle > (aic0:6:0): "WangDAT Model 2600 01.2" type 1 removable SCSI 2 > st0(aic0:6:0): Sequential-Access density code 0x93, 512-byte blocks, > write-enabled Aha, so what's the problem? > Now.. the controller is an old Adaptec 1524, I would think it is to fault, > but it hasn't given me problems with any other SCSI devices, such as > CD-ROMS, SCSI disks and Exabyte tape drives. The 152x controllers aren't the greatest, but they seem to work OK. > Or at the lease, help me decrypt what these dip-switches are for? Here is some mail I received when I was setting mine up : >From rose@locus.dml.com Thu Oct 17 16:03:09 1996 Received: from locus.dml.com [198.49.1.49] by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) with ESMTP id QAA13046 for <msmith@atrad.adelaide.edu.au>; Thu, 17 Oct 1996 16:02:54 +0930 Received: from localhost (rose@localhost) by locus.dml.com (8.6.12/8.6.12) with SMTP id XAA05137 for <msmith@atrad.adelaide.edu.au>; Wed, 16 Oct 1996 23:29:07 -0700 Date: Wed, 16 Oct 1996 23:29:07 -0700 (PDT) From: Stephen Rose <rose@dml.com> To: Michael Smith <msmith@atrad.adelaide.edu.au> Subject: Re: WangDAT 2x00 units... Message-ID: <Pine.NEB.3.94.961016222405.3330A-100000@locus.dml.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Status: RO I've had one of these for a couple of years. I'm happy with it. I can't say that I've used it heavily, though. I use it for the very occasional backup and transfering bits from home to work and back. I have to use uncompressed mode for that because it is incompatible with most other drives in compressed mode, as you pointed out. Here is how ncrcontrol sees it: T:L Vendor Device Rev Speed Max Wide Tags 6:0 WangDAT Model 2600 01.7 5.0 10.0 8 - The label on the drive says that it's a model 2000. The firmware for the 2600 and the 2000 is probably the same. Here is a table the manual has: Model Format Length Interface ------------------------------------------------------------ 1300 DDS 60m Single-ended 1300XL DDS 60,90m Single-ended 1300DF DDS 60m Differential 1300DL DDS 60,90m Differential 2600 WGC,DDS 60m Single-ended 2000 WGC,DDS 60,90m Single-ended I think WGC is the stack compression capability. Here are the dip switches: Number Function Default --------------------------------------- sw1-1 Buffered Mode off sw1-2 Default tape format on sw1-3 scsi-1/scsi-2 protocol off sw1-4 cassette load/unload off sw1-5 scsi bus parity enable on sw1-6 scsi bus id lsb off sw1-7 scsi bus id off sw1-8 scsi bus id msb off I think I've set sw1-2 to off to be compatible with other drives, although compression can be enabled in software. Sw1-3 is on because I wanted it to be scsi-2. I think I set sw1-4 on as well. Setting sw-1 to off lets the buffered mode be set by software. I've left that alone. JP-1 (behind the termination resistor sockets) is for enabling termination power on the scsi bus. Here is a table about sw1-4: Response to test unit ready or medium access command Condition Amber LED sw1-4 on sw1-4 off ------------------------------------------------------------------------ check condition check condition 1 Cassette off sense: not ready sense: not ready out medium not pres. medium not pres. ------------------------------------------------------------------------ check condition no check condition 2 insert start sense: not ready command accepted cassette flashing coming ready ------------------------------------------------------------------------ check condition no check condition 3 cassette flashing sense: not ready command accepted loading coming ready ------------------------------------------------------------------------ no check condition no check condition 4 cassette steady on command accepted command accepted loaded ------------------------------------------------------------------------ check condition check condition 5 cassette flashing sense: not ready sense: not ready unloading medium not pres. medium not pres. ------------------------------------------------------------------------ Here's another table: LED Color State Meaning ------------------------------------------------------------------------- Left green on drive active on scsi bus (Activity/Fault) ------------------------------------------------- red flashing drive fault condition exists ------------------------------------------------------------------------- flashing loading or unloading cassette Right amber ----------------------------------------- (Cassette/Format) on Cassette in place, format: DDS ------------------------------------------------- green on Cassette in place, format: Comp. ------------------------------------------------------------------------- It understands the usual cleaning cassette sort of thing, of course. The only other interesting thing in the manual is something called power eject. Holding the eject button in for 10 seconds causes a forced eject and a drive reset. Kind of a last resort thing. I haven't figured out how to get it to write a tape in the other format once it writes a tape in one format. I'd like to be able to write a tape in uncompressed format, if I want to, after once writing it in compressed format. It seems to insist on mounting the tape in compressed format if is sees that format. If you figure out how to do that, I'd like to know. Hope some of this is new. Steve Rose > -Brandon Gillespie > > > -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[
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