cfgadm -c unconfigure Fails if Path Specified is to an MPXIO Enabled Device (6948701)

On a Sun Blade X6270 M2 with a Sun Storage 6Gb SAS REM HBA (SGX-SAS6-REM-Z), the Solaris cfgadm -c unconfigure command fails if the path specified is to an MPXIO enabled device.

Workaround

1. Select the disk that you want to unplug.

   In this example we want to unplug the drive c0t5000C5000F0FE227d0.

   # format
   Searching for disks...done
   AVAILABLE DISK SELECTIONS:
   0. c0t5000C5000F0E5AFFd0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
   /scsi_vhci/disk@g5000c5000f0e5aff
   1. c0t5000C5000F0FE227d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
    /scsi_vhci/disk@g5000c5000f0fe227

2. Run mount(1M) to identify whether the device is mounted or if it is a boot drive.

   The following is an example on how to identify if the drive is mounted:

   # mount | grep c0t5000C5000F0E5AFFd0 /mnt on 
   /dev/dsk/c0t5000C5000F0E5AFFd0s6 read/write/setuid/devices/intr/largefiles
   /logging/xattr/onerror=panic/dev=600016 on Fri Jun  4 10:37:08 2010

   To identify if the drive is a boot drive, see the following example:

   bash-3.00# mount | grep c0t5000C5000F0FE227d0 / on 
   /dev/dsk/c0t5000C5000F0FE227d0s0 read/write/setuid/devices/intr/largefiles
   /logging/xattr/onerror=panic/dev=800010 on Wed Jun 9 09:58:24 2010
   
   /export/home on /dev/dsk/c0t5000C5000F0FE227d0s7 read/write/setuid/devices/intr
   /largefiles/logging/xattr/onerror=panic/dev=800017 on Wed Jun 9 09:59:13 2010
   
   Note: "/" root directory

3. Run fuser(1M) command to identify the process(es) accessing the disk.

   Example of no processes accessing the disk:

   # fuser -d /dev/dsk/c0t5000C5000F0E5AFFd0s2 /dev/dsk
   /c0t5000C5000F0E5AFFd0s2:

   Example when a process is accessing the disk (fuser identifies the process):

   bash-3.00# fuser -d /dev/dsk/c0t5000C5000F0FE227d0s2 /dev/dsk
   /c0t5000C5000F0FE227d0s2: 1036o
   
   bash-3.00# ps -ef | grep 1036
   root 1036 982 0 11:56:34 pts/2 0:02 dd if=/dev/dsk/c0t5000C5000F0E5AFFd0s2 
   of=/dev/dsk/c0t5000C5000F0FE227d0s7

4. Kill all of the processes identified in Step 3. For example:

   kill —p PID

   or

   kill —P PID

5. Do one of the following to remove the disk:

   • If the disk is not a boot drive, umount the mount points and then run sync(1M) to flush the disk:

     # umount /mnt
     # mount |grep c0t5000C5000F0E5AFFd0
     # sync
     Remove the disk safely.

   • If the disk is a boot drive, run sync(1M) to flush the disk and shutdown the system:

     bash-3.00# sync
     bash-3.00# init 0
     Remove the disk safely.