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Date:      Sat, 06 Jul 2002 11:29:20 -0700
From:      Randy Bush <randy@psg.com>
To:        FreeBSD Stable <freebsd-stable@freebsd.org>
Subject:   umass becomes da0 over scbus
Message-ID:  <E17QuJ6-0000Fa-00@rip.psg.com>

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4.6-stable as of yesterday

i have an ahc with a single drive.  standalone it comes up find as
da0s...  and boots right along.

    Waiting 5 seconds for SCSI devices to settle
    Mounting root from ufs:/dev/da0s1a
    da0 at ahc0 bus 0 target 0 lun 0
    da0: <IBM IC35L036UWPR15-0 S80C> Fixed Direct Access SCSI-3 device 
    da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing Enabled
    da0: 35003MB (71687340 512 byte sectors: 255H 63S/T 4462C)

but, if i have a usb hard drive plugged in, the umass device takes
over da0 and the scsi drive renumbers to da1 and then the
post-device boot fails.

i even tried hacking in

    # SCSI peripherals
    device          scbus0          # SCSI bus (required)
    device          da              # Direct Access (disks)
    device          da0 at scbus0 target 0 unit 0

but get the same result.

randy


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