Step by step guide to scan FC LUNS on Solaris.

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

1.List the connected HBA’s.

root@hans-karri-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

2.Verify FC channel ‘s are connected and configured.

hans@sol# cfgadm -al -o show_FCP_dev |grep fc-fabric
c2 ; fc-fabric    connected    configured   unknown
c4 ; fc-fabric    connected    configured   unknown
hans@sol#

3.To find the HBA’s World wide Node number (WWN),use fcinfo command,

hans@sol# fcinfo hba-port |grep Port
HBA Port WWN: 10000000c884bb48
HBA Port WWN: 10000000c884bb49
HBA Port WWN: 10000000c884b85c
HBA Port WWN: 10000000c884b85d
hans@sol#

4.You can also find the WWN form luxadm command, if  HBA is  already connected to FC switch.

hans@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)
hans@sol#

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.

hans@sol# cfgadm -al -o show_FCP_dev c2 c4

6.If you see any controller port “WWN” showing as “unconfigured” ,then  you can initiate FC session using below mentioned command.

hans@sol# cfgadm -c configure c2::50080e8008cfb814
hans@sol# cfgadm -c configure c4::50080e8008cfb814

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.

root@hans-karri-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

2.Reset the HBA using forcelip option.

root@hans-karri-SOL11:~# luxadm -e forcelip /devices/pci@1d,700000/SUNW,qlc@1,1/fp@0,0:devctl

Forcelip can be issued to the controller names as well.

hans@sol# cfgadm -al -o show_FCP_dev |grep fc-fabric
c2                             fc-fabric    connected    configured   unknown
c4                             fc-fabric    connected    configured   unknown
hans@sol#hans@sol# luxadm -e forcelip /dev/cfg/c2

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.

root@hans-karri-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):
root@hans-karri-SOL11:~#

2.Assume new SCSI harddisks are added to the server.
3.Scan the SCSI disks.

root@hans-karri-SOL11:~# devfsadm -c disk
root@hans-karri-SOL11:~# echo |formatSearching 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):


4.Still if you are not able to see the new disks,use cfgadm command and then devfsadm.

root@hans-karri-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 pr                                                             ble the service. See cfgadm_shp(1M) for more details.
root@Unixarena-SOL11:~# 
root@Unixarena-SOL11:~# devfsadm -c disk
root@Unixarena-SOL11:~#