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Thursday, January 23, 2014

How to check mounted luns ?

Install FC PCI card on server.

To check the FC PCI card port details on Server. use below commnd.

#ls /sys/class/fc_host
 host8  host9
(In above case host8 and host9 are adapters )

# cat /sys/class/fc_host/host8/port_name

# cat /sys/class/fc_host/host9/port_name

 (In above example we have 2 port on server.. With wwnn number as described in output)
You can also get above information using command below
#systool -c fc_host -A port_name

 Before scanning the fc lun  . 
Check the number of disks
# fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l

(In above case i have  5 disks before running the scan)

# echo "1" > /sys/class/fc_host/host8/issue_lip
# echo "1" > /sys/class/fc_host/host9/issue_lip

(Check /var/log/messages .. Sometime it may take time as its asynchronous process )
After scanning the fc lun.
Check the number of disks.
# fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l

(Earlier it was 5 .. We have added only one lun however due to fc adaptor's 4 port its showing 4.. We need to enable multi pathing here)
You can also ensure the above by counting the number of disks.
#fdisk -l |egrep '^Disk' |egrep -v 'dm-' ( some disks excluded to include new disk details)
In addition to existing disks i can see below 4 disks
Disk /dev/sdf: 1099.5 GB, 1099511627776 bytes
Disk /dev/sdg: 1099.5 GB, 1099511627776 bytes
Disk /dev/sdh: 1099.5 GB, 1099511627776 bytes
Disk /dev/sdi: 1099.5 GB, 1099511627776 bytes

All the lun details are stored in below path.

Here comes the pain understanding the output :)

Oracle VM 3 How to find the VM Server version.

Yes that old /etc/issue file will help you find the Server version details in below format.

#cat /etc/issue
Oracle VM server release 3.2.2
Hypervisor running in 64 bit mode with Hardware Virtualization support.

Network :
IF : bond0      MAC :  IP :
IF : eth0       MAC :
IF : eth1       MAC :
IF : eth2       MAC :
IF : eth3       MAC :
IF : eth4       MAC :
IF : eth5       MAC :
IF : eth6       MAC :
IF : eth7       MAC :

cpu family      :
model           :
model name      :