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Date:      Fri, 25 Jun 1999 20:38:49 +0200
From:      Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
To:        scsi@freebsd.org
Subject:   Unexpected busfree galore
Message-ID:  <19990625203849.C8753@daemon.ninth-circle.org>

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Hi,

really need some advice on this since it's driving me crazy by now since I
cannot determine the problem:

Jun 25 20:27:50 daemon /kernel: SEQADDR == 0x110
Jun 25 20:28:18 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:28:19 daemon /kernel: SEQADDR == 0x10f
Jun 25 20:28:47 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:28:47 daemon /kernel: SEQADDR == 0x110
Jun 25 20:29:15 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:29:15 daemon /kernel: SEQADDR == 0x10f
Jun 25 20:29:44 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:29:44 daemon /kernel: SEQADDR == 0x10f
Jun 25 20:30:12 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:30:12 daemon /kernel: SEQADDR == 0x110
Jun 25 20:30:40 daemon /kernel: Unexpected busfree.  LASTPHASE == 0x40
Jun 25 20:30:40 daemon /kernel: SEQADDR == 0x10f

That's what I get when I/O intense stuff happens on one of my HD's. Funny
thing is it's always this particular HD. Not one of the others.

My current setup consists of:

ahc0: <Adaptec 2940 Ultra SCSI adapter> irq 11 at device 17.0 on pci0
ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
Waiting 15 seconds for SCSI devices to settle
da2 at ahc0 bus 0 target 2 lun 0
da2: <SEAGATE ST39173W 6244> Fixed Direct Access SCSI-2 device 
da2: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da2: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C)
da1 at ahc0 bus 0 target 1 lun 0
da1: <QUANTUM FIREBALL SE6.4S PJ0A> Fixed Direct Access SCSI-2 device 
da1: 10.000MB/s transfers (10.000MHz, offset 15), Tagged Queueing Enabled
da1: 6149MB (12594960 512 byte sectors: 255H 63S/T 784C)
da0 at ahc0 bus 0 target 0 lun 0
da0: <QUANTUM FIREBALL_TM3200S 300X> Fixed Direct Access SCSI-2 device 
da0: 10.000MB/s transfers (10.000MHz, offset 15), Tagged Queueing Enabled
da0: 3067MB (6281856 512 byte sectors: 255H 63S/T 391C)
da3 at vpo0 bus 0 target 5 lun 0
da3: <IOMEGA ZIP 100 PLUS J.66> Removable Direct Access SCSI-2 device 
da3: 96MB (196608 512 byte sectors: 64H 32S/T 96C)
changing root device to da0s1a
cd0 at ahc0 bus 0 target 5 lun 0
cd0: <SONY CD-ROM CDU-415 1.1i> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present

This is on a CURRENT system, cvsupped daily and made world (almost) daily.

I also had a 2940U2W in there which gave the same problems.

It's currently laid out like this:

da2-----ahc----da1---da0---cd0---active-terminator

I have termination of on all devices except da2. Termination of the ahc is
set to high on/low off or even automatic.

The ahc/da2 cable is a 68 pins cable
the other cable is a 50 pins one.

Do you guys reckon I need to buy an active terminator for my 68 pins cable
as well or buy a new cable?

If any more information is needed I am happy to give it... (like cable
langth and such)

Thank you very much in advance,

-- 
Jeroen Ruigrok van der Werven                asmodai(at)wxs.nl
        The *BSD Programmer's Documentation Project 
Network/Security Specialist      <http://home.wxs.nl/~asmodai>;
*BSD: We are back and will not accept no...


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