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====== Solaris – How to Scan FC LUNS and SCSI Disks ? ======

http://www.unixarena.com/2013/08/solaris-how-to-scan-fc-luns-and-scsi.html

===== Scanning FC/SAN LUNS in Solaris =====

Before scanning LUNS, we see some useful commands which are related to Fibre Channel(FC).

1.List the connected HBA’s.
<cli prompt='#'>
root@Unixarena-SOL11:~# luxadm -e port |grep CONNECTED
/devices/pci@1d,700000/SUNW,qlc@1,1/fp@0,0:devctl CONNECTED
/devices/pci@1d,700000/SUNW,qlc@3/fp@0,0:devctl CONNECTED
</cli>

2.Verify FC channel ‘s are connected and configured.
<cli prompt='#'>
Unix@sol# cfgadm -al -o show_FCP_dev |grep fc-fabric
c2                             fc-fabric    connected    configured   unknown
c4                             fc-fabric    connected    configured   unknown
</cli>

3.To find the HBA’s World wide Node number (WWN),use fcinfo command,
<cli prompt='#'>
Unix@sol# fcinfo hba-port |grep Port
HBA Port WWN: 10000000c884bb48
HBA Port WWN: 10000000c884bb49
HBA Port WWN: 10000000c884b85c
HBA Port WWN: 10000000c884b85d
</cli>

4.You can also find the WWN form luxadm command, if  HBA is  already connected to FC switch.
<cli prompt='#'>
Unix@sol# luxadm -e dump_map /dev/cfg/c4
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    29900   0        50080e8008cfb814 50080e8008cfb814 0x0  (Disk device)
1    27400   0        10000000c884b85c 20000000c884b85c 0x1f (Unknown Type,Host Bus Adapter)
</cli>

From the above output, the last line shows the HBA information.In the same you can find the other controller information as well.

5.Zoning can be verified using the below command.
<cli prompt='#'>
Unix@sol# cfgadm -al -o show_FCP_dev c2 c4
</cli>

6.If you see any controller port “WWN” showing as “unconfigured” ,then  you can initiate FC session using below mentioned command.
<cli prompt='#'>
Unix@sol# cfgadm -c configure c2::50080e8008cfb814
Unix@sol# cfgadm -c configure c4::50080e8008cfb814
</cli>

==== Let’s see how we can re-scan the SAN/FC luns on solaris 10/11 hosts. ====

To scan new FC luns, Just execute the below commands.
Scanning FC/SAN LUNS 		
  1 	cfgadm -al 	To scan FC luns
  2 	devfsadm -c disk 	 To make sure all the device files are created
  3 	tail /var/adm/messages 	To see the new LUN’s information
  4 	echo |format 	To get the new LUN’s information
  5 	ls -lrt /dev/rdsk |grep s2|tail 	To get the new LUN’s information
“luxadm probe” also used to scan FC luns but i am happy to use cfgadm.

If you still not able to see the new LUNS/DISK ,then you can try to reset the HBA as last option if you have multipath enabled.  (Do not try in critical servers unless you have confident on multipathing)

1.List the connected HBA.
<cli prompt='#'>
root@Unixarena-SOL11:~# luxadm -e port |grep CONNECTED
/devices/pci@1d,700000/SUNW,qlc@1,1/fp@0,0:devctl CONNECTED
/devices/pci@1d,700000/SUNW,qlc@3/fp@0,0:devctl CONNECTED
</cli>

2.Reset the HBA using forcelip option.
<cli prompt='#'>
root@Unixarena-SOL11:~# luxadm -e forcelip /devices/pci@1d,700000/SUNW,qlc@1,1/fp@0,0:devctl
</cli>

Forcelip can be issued to the controller names as well.
<cli prompt='#'>
Unix@sol# cfgadm -al -o show_FCP_dev |grep fc-fabric
c2                             fc-fabric    connected    configured   unknown
c4                             fc-fabric    connected    configured   unknown
Unix@sol# luxadm -e forcelip /dev/cfg/c2
</cli>

3. Verify the controller status using “cfgadm -al”.Make sure disks didn;t loose any SAN paths after the HBA reset. If everything seems to be okay ,then isssue the forcelip to the another controller.

If still you are not able to see the new FC/SAN LUNS ,then reboot the server and try. Once you see the new lun, make sure that  multiple FC paths are enabled to that. Minimum two FC paths required for SAN disks.

” luxadm display /dev/rdsk/c1txxxxxxd0s2″  – To verify the FC lun details and multipathing.

 
===== Scanning Local SCSI disks in Solaris =====

1.List the currently available harddisks.
<cli prompt='#'>
root@Unixarena-SOL11:~# echo |format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
       0. c8t0d0 
          /pci@0,0/pci15ad,1976@10/sd@0,0
       1. c8t1d0 
          /pci@0,0/pci15ad,1976@10/sd@1,0
       2. c8t2d0 
          /pci@0,0/pci15ad,1976@10/sd@2,0
       3. c8t3d0 
          /pci@0,0/pci15ad,1976@10/sd@3,0
       4. c8t4d0 
          /pci@0,0/pci15ad,1976@10/sd@4,0
       5. c8t5d0 
          /pci@0,0/pci15ad,1976@10/sd@5,0
       6. c8t6d0 
          /pci@0,0/pci15ad,1976@10/sd@6,0
Specify disk (enter its number): Specify disk (enter its number):
</cli>

2.Assume new SCSI harddisks are added to the server.

3.Scan the SCSI disks.
<cli prompt='#'>
root@Unixarena-SOL11:~# devfsadm -c disk
root@Unixarena-SOL11:~# echo |format
Searching for disks...done

AVAILABLE DISK SELECTIONS:
       0. c8t0d0 
          /pci@0,0/pci15ad,1976@10/sd@0,0
       1. c8t1d0 
          /pci@0,0/pci15ad,1976@10/sd@1,0
       2. c8t2d0 
          /pci@0,0/pci15ad,1976@10/sd@2,0
       3. c8t3d0 
          /pci@0,0/pci15ad,1976@10/sd@3,0
       4. c8t4d0 
          /pci@0,0/pci15ad,1976@10/sd@4,0
       5. c8t5d0 
          /pci@0,0/pci15ad,1976@10/sd@5,0
       6. c8t6d0 
          /pci@0,0/pci15ad,1976@10/sd@6,0
       7. c8t8d0 
          /pci@0,0/pci15ad,1976@10/sd@8,0
Specify disk (enter its number): Specify disk (enter its number):
</cli>


4.Still if you are not able to see the new disks,use cfgadm command and then devfsadm.
<cli prompt='#'>
root@Unixarena-SOL11:~# cfgadm -al
Ap_Id                          Type         Receptacle   Occupant     Condition
c8                             scsi-bus     connected    configured   unknown
c8::dsk/c8t0d0                 disk         connected    configured   unknown
c8::dsk/c8t1d0                 disk         connected    configured   unknown
c8::dsk/c8t2d0                 disk         connected    configured   unknown
c8::dsk/c8t3d0                 disk         connected    configured   unknown
c8::dsk/c8t4d0                 disk         connected    configured   unknown
c8::dsk/c8t5d0                 disk         connected    configured   unknown
c8::dsk/c8t6d0                 disk         connected    configured   unknown
c8::dsk/c8t8d0                 disk         connected    configured   unknown
cfgadm: Configuration administration not supported: Error: hotplug service is probably disabled.
root@Unixarena-SOL11:~# devfsadm -c disk
</cli>
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