[Bug 274959] GENERIC-MMCCAM: unable to cope with Hetzner VPS (ARM Ampere) SCSI CD-ROM drive

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274959

            Bug ID: 274959
           Summary: GENERIC-MMCCAM: unable to cope with Hetzner VPS (ARM
                    Ampere) SCSI CD-ROM drive
           Product: Base System
           Version: 14.0-RELEASE
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: freebsd@igalic.co

the following diagnostic is repeated several dozen times:

(probe0:vtscsi0:0:115:0): Probe completed
(probe0:vtscsi0:0:115:0): Periph invalidated
(probe0:vtscsi0:0:115:0): Periph destroyed
(probe0:vtscsi0:0:116:0): Periph created
(probe0:vtscsi0:0:116:0): Probe started
(probe0:vtscsi0:0:116:0): Probe PROBE_INVALID to PROBE_INQUIRY
(probe0:vtscsi0:0:116:0): INQUIRY. CDB: 12 00 00 00 24 00 
(probe0:vtscsi0:0:116:0): CAM status: Selection Timeout
(probe0:vtscsi0:0:116:0): Error 6, Unretryable error
(probe0:vtscsi0:0:116:0): (noperiph:vtscsi0:0:116:ffffffff): Probe
PROBE_INQUIRY to PROBE_INVALID
xpt_async(AC_LOST_DEVICE)
(probe0:vtscsi0:0:116:0): Probe completed
(probe0:vtscsi0:0:116:0): Periph invalidated
(probe0:vtscsi0:0:116:0): Periph destroyed
(probe0:vtscsi0:0:117:0): Periph created
(probe0:vtscsi0:0:117:0): Probe started
(probe0:vtscsi0:0:117:0): Probe PROBE_INVALID to PROBE_INQUIRY
(probe0:vtscsi0:0:117:0): INQUIRY. CDB: 12 00 00 00 24 00 
(probe0:vtscsi0:0:117:0): CAM status: Selection Timeout
(probe0:vtscsi0:0:117:0): Error 6, Unretryable error
(probe0:vtscsi0:0:117:0): (noperiph:vtscsi0:0:117:ffffffff): Probe
PROBE_INQUIRY to PROBE_INVALID
xpt_async(AC_LOST_DEVICE)


eventually, we get:

cd0 at vtscsi0 bus 0 scbus0 target 0 lun 0
cd0: <QEMU QEMU CD-ROM 2.5+> Removable CD-ROM SPC-3 SCSI device
cd0: 300.000MB/s transfers
cd0: Command Queueing enabled
cd0: Attempt to query device size failed: NOT READY, Medium not present


but the above diagnostic still keeps being repeated, until it's first
interleaved, then overtaken by a new kind:

(cd0:vtscsi0:0:0:0): cdclose
(noperiph:vtscsi0:0:0:1): (cd0:vtscsi0:0:0:0): xpt_async(AC_GETDEV_CHANGED)
cdopen
(cd0:vtscsi0:0:0:0): READ CAPACITY. CDB: 25 00 00 00 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error
(cd0:vtscsi0:0:0:0): cdclose
(cd0:vtscsi0:0:0:0): cdopen
(cd0:vtscsi0:0:0:0): READ CAPACITY. CDB: 25 00 00 00 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error
(cd0:vtscsi0:0:0:0): cdclose
(cd0:vtscsi0:0:0:0): cdopen
(cd0:vtscsi0:0:0:0): READ CAPACITY. CDB: 25 00 00 00 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error
(cd0:vtscsi0:0:0:0): cdclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen
(da0:vtscsi0:0:0:1): daclose
(da0:vtscsi0:0:0:1): daopen

with that out of the way, we get to a new sequence:

(cd0:vtscsi0:0:0:0): TEST UNIT READY. CDB: 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error
(cd0:vtscsi0:0:0:0): TEST UNIT READY. CDB: 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error
(cd0:vtscsi0:0:0:0): TEST UNIT READY. CDB: 00 00 00 00 00 00 
(cd0:vtscsi0:0:0:0): CAM status: SCSI Status Error
(cd0:vtscsi0:0:0:0): SCSI status: Check Condition
(cd0:vtscsi0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(cd0:vtscsi0:0:0:0): Error 6, Unretryable error

etc…

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