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The probe-scsi-all command shows the DVD-ROM at /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1 at target 6, LUN 0, and shows the disks at /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1 at targets 0 and 1.

 ok boot /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1/sd@6,0:f
ERROR: Can't open boot-device

 ok boot /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1/sd@0,0:f
ERROR: Can't open boot-device

Some users may be confused by this, as they assume that the OBP driver name will always be the same as the Solaris[TM] driver name. This is not the case.

When running the 'format' command from Solaris, it reports the device path as "sd@X,X". This also adds to the confusion, as it is using the Solaris driver name in the device path.

The correct method to allow for a successful boot is to use the device path as reported by the OpenBoot PROM (OBP), using the "show-disks" command.

It should be noted that the show-disks command does not report the device SCSI Target and LUN details. Target and LUN details can be obtained from the "probe-scsi-all" command.

This means you will need to add something like "@X,X" to the end of the device path supplied by "show-disks".

For example:

 ok probe-scsi-all
.
.
/ssm@0,0/pci@1d,700000/pci@1/scsi@2,1
Target 0
Unit 0   Disk     FUJITSU MAP3367N SUN36G 0401
Target 1
Unit 0   Disk     FUJITSU MAP3367N SUN36G 0401
Target 2
Unit 0   Processor     Sun     D240            1.09
Target 3
Unit 0   Processor     Sun     D240            1.09
Target 4
Unit 0   Removable Tape     HP      C5683A          C005
Target 6
Unit 0   Removable Read Only device    TOSHIBA DVD-ROM SD-M17111005
.
.
ok show-disks
a) /pci@3d,700000/pci@1/scsi@2,1/disk
b) /pci@3d,700000/pci@1/scsi@2/disk
c) /pci@1d,700000/pci@1/scsi@2,1/disk
d) /pci@1d,700000/pci@1/scsi@2/disk
q) NO SELECTION
Enter Selection, q to quit: q

Using this information, and the Target / LUN details obtained from a probe-scsi-all, you can now construct the correct device path to boot from.

 ok reset-all
ok boot /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1/disk@6,0:f

NOTE:

Make sure that you execute 'reset-all' before 'boot' with "disk@X,X" at the end of the device path, otherwise you may not be able to boot and get the error: Data MMU Miss.

Using "reset-all" will avoid the following scenario:

 ok boot /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1/sd@6,0:f
ERROR: Can't open boot-device
ok boot /ssm@0,0/pci@1d,700000/pci@1/scsi@2,1/disk@6,0:f
Data MMU Miss

Whilst this issue is most frequently encountered on the D240, as it is most frequently used boot storage for the Sunfire Midrange series of servers, the problem is not unique to the D240. This misconfiguration error can be seen on virtually any storage that can be connected to the Sun[TM] Dual FastEthernet / Dual SCSI PCI Card (e.g Sun StorEdge[TM] S1).

The most important thing to remember is that, regardless of the controller type, the paths as reported by "show-disks" at the OBP are the paths you need to use when booting.

• Please send any feedback on this resolution path to Feedback_MSG_Domain@sun.com. Include the document ID in the subject line.

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