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Date:      Fri, 16 Aug 2002 17:39:06 +0200
From:      Jan Lentfer <Jan.Lentfer@web.de>
To:        freebsd-questions@freebsd.org
Cc:        freebsd-alpha@freebsd.org
Subject:   Problems with external SCSI device
Message-ID:  <1029512346.3d5d1c9aa1125@www-mail.lan>

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Hi all,

sorry for cross-posting but I am not quite sure if this maybe a alpha specific
problem.

Here is the situation:
I bought an external DAT streamer from ebay, whenever I try to boot with the
streamer connected I machine stops with:

ahc0: Someone reset channel A


Here is the scsi part of my dmesg without the streamer:
[...]
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0x8000-0x80ff mem 0x80040000-0x8004
0fff irq 20 at device 10.0 on pci1
ahc0: interrupting at CIA irq 20
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
[...]
da1 at ahc0 bus 0 target 8 lun 0
da1: <SEAGATE ST19171W 0023> Fixed Direct Access SCSI-2 device 
da1: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da1: 8683MB (17783112 512 byte sectors: 255H 63S/T 1106C)
da0 at ahc0 bus 0 target 0 lun 0
da0: <COMPAQ ST15150W 6216> Fixed Direct Access SCSI-2 device 
da0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 4094MB (8386000 512 byte sectors: 255H 63S/T 522C)
[...]

this is the relevant part of my kernel-config:
# SCSI Controllers
device          ahc             # AHA2940 and onboard AIC7xxx devices
#device         esp             # 53C94 & friends, not CAM-ified
#device         isp             # Qlogic family
#device         ncr             # NCR/Symbios Logic
#device         sym             # NCR/Symbios Logic (newer chipsets)

# SCSI peripherals
device          scbus           # SCSI bus (required)
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
device          cd              # CD
device          pass            # Passthrough device (direct SCSI access)

I tried different IDs on the streamer - no effect.


Can anyone help me?

Many Thanks in advance,

Jan


PS: uname -a
FreeBSD jan-alpha.lan 4.6.1-RELEASE-p5 FreeBSD 4.6.1-RELEASE-p5 #1: Fri Aug 16
17:18:26 CEST 2002     jan@jan-alpha.lan:/usr/src/sys/compile/EV56  alpha

This is a DEC PWS 500a


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