From owner-freebsd-current  Sun Oct  4 12:56:46 1998
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Date: Sun, 04 Oct 1998 20:39:28 +0100 (BST)
From: Duncan Barclay <dmlb@ragnet.demon.co.uk>
To: Johan Granlund <johan@granlund.nu>
Subject: RE: Exabyte 8200 and CAM, Take 2
Cc: freebsd-current@FreeBSD.ORG
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On 04-Oct-98 Johan Granlund wrote:
> HI
> 
> I have a Exabyte 8200 tape streamer. It worked fine in a preCAM system exept
> for 
> timeout errors when using a rewind devicenode.
> 
> After CAM i get a lookups at probing of the SCSI-bus. I don't get any
> timeoutmessages 
> or anything. If the powercord to the tapedrive is unplugged the boot
> continues and the 
> tapedrive is in the report. This is even when the tapedrive stays unplugged.
> 
> I have tried two version of firmware on the tapedrive 2618 and 2644 for no
> effekt.
> 
> If multiple LUN support is enabled (normally off on my system) on the
> controller 
> (Adaptec 2940UW), the tape driver is reported on all LUNs in the BIOS scan. I
> thought 
> that maybe multiple LUN probing locked the drive and tried the following
> patch to 
> sys/cam/cam_xpt.c for no effect.
> {
>       {
>       T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE, "EXB-8200*", "*"
>       },
>       CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
> },
> 
> Follows part of dmesg with a 15 min wait between lockup and unplugging of
> powercord 
> to tapedrive and a SCSI_DELAY of 60000.

Strange, my Exabyte 8200 probes fine with no lockups, I have a NCR810 card.
Current as of about 06:30GMT 2/10/98. Exabyte has same firmware as yours.

FreeBSD 3.0-BETA #0: Sat Oct  3 03:33:50 GMT 1998
    dmlb@computer.my.domain:/usr/src/sys/compile/COMPUTER

...
ncr0:<ncr 53c810 fast10 scsi> rev 0x01 int a irq 9 on pci0.8.0
...
sa0 at ncr0 bus 0 target 5 lun 0
sa0: <EXABYTE EXB-8200 2618> Removable Sequential Access SCSI1 device 
sa0: 3.300MB/s transfers

Duncan

---
________________________________________________________________________
Duncan Barclay          | God smiles upon the little children,
dmlb@ragnet.demon.co.uk | the alcoholics, and the permanently stoned.
________________________________________________________________________

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