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Mapping Between Logical and Physical Device Names on a Sun E450

December 2, 2004, 1:48 am

If you need to find the slot that a disk is in from a given logical name (c3t3d0) you can follow this document from sun. I’ve mirrored the important bits below incase it disapears

  1. Determine the UNIX physical device name from the SCSI error message.

    SCSI error messages are typically displayed in the system console
    and logged in the /usr/adm/messages file.

             WARNING: /pci@6,4000/scsi@4,1/sd@3,0 (sd228)
         Error for Command: read(10)     Error level: Retryable
         Requested Block: 3991014        Error Block: 3991269
         Vendor: FUJITSU                 Serial Number: 9606005441
         Sense Key: Media Error
         ASC: 0x11 (unrecovered read error), ASCQ: 0x0, FRU: 0x0

    In the example SCSI error message above, the UNIX physical device name is /pci@6,4000/scsi@4,1/sd@3.

  2. Determine the UNIX logical device name by listing the contents of
    the /dev/rdsk directory.

    Use the grep command to filter the output for any occurrence of
    the UNIX physical device name determined in Step 1:

            % ls -l /dev/rdsk | grep /pci@6,4000/scsi@4,1/sd@3
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s0 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:a,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s1 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:b,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s2 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:c,raw
        lrwxrwxrwx1 root     root        45 Jan 30 09:07 c12t3d0s3 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:d,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s4 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:e,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s5 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:f,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s6 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:g,raw
        lrwxrwxrwx   1 root     root        45 Jan 30 09:07 c12t3d0s7 ->
        ../../devices/pci@6,4000/scsi@4,1/sd@3,0:h,raw

    The resulting output indicates the associated UNIX logical device name.
    In this example, the logical device name is c12t3d0

  3. Determine the disk slot number using the prtconf command.

    Substitute the string disk@ for sd@ in the physical device name determined in Step 1. The result in this example is
    /pci@6,4000/scsi@4,1/disk@3.

    Use the grep command to find this name in the output of the
    prtconf command:

            % prtconf -vp | grep /pci@6,4000/scsi@4,1/disk@3
          slot#11:  '/pci@6,4000/scsi@4,1/disk@3'
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