solaris. remove unusable scsi lun

Solaris remove unusable or failing scsi lun

1. The removed devices show up as drive not available in the output of the format command:

# format
Searching for disks...done
................
     255. c1t50000974082CCD5Cd249 <drive not available>
          /pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w50000974082ccd5c,f9
................

     529. c3t50000974082CCD58d249 <drive not available>
          /pci@7,700000/SUNW,qlc@0/fp@0,0/ssd@w50000974082ccd58,f9

2. After the LUNs are unmapped Solaris displays the devices as either unusable or failing.

# cfgadm -al -o show_SCSI_LUN | grep -i unusable
#
# cfgadm -al -o show_SCSI_LUN | grep -i failing
c1::50000974082ccd5c,249       disk         connected    configured   failing
c3::50000974082ccd58,249       disk         connected    configured   failing
#

3. This will kick the device from failing to unusable. and also removes them from format o/p.

# luxadm -e offline /dev/rdsk/c1t50000974082CCD5Cd249s0
# luxadm -e offline /dev/rdsk/c3t50000974082CCD58d249s0

Also you can use luxadm command to switch device from failing state to unusable

# luxadm -e forcelip /dev/cfg/c1

# luxadm -e forcelip /dev/cfg/c3

4. Check the state

# cfgadm -al -o show_SCSI_LUN | grep -i unusable
c1::50000974082ccd5c,249       disk         connected    configured   unusable
c3::50000974082ccd58,249       disk         connected    configured   unusable

5. To remove the device from the cfgadm database, run the following commands on the HBA:

# cfgadm -c unconfigure -o unusable_SCSI_LUN c1::50000974082ccd5c
# cfgadm -c unconfigure -o unusable_SCSI_LUN c3::50000974082ccd58

6. Repeat step 2 to verify that the LUNs have been removed.

7. Clean up the device tree. The following command removes the /dev/rdsk... links to /devices.