[SOLVED] Checking LUNS details in redhat server.

udaya_fm · 01-31-2012, 02:01 AM

Hi,

Could any one please let me know how to check the LUN details which was assigned from connected storage device by storage team. What are the details we have to give to storage team for requesting new LUN?

-Uday

anomie · 01-31-2012, 08:10 AM

@udaya_fm: With respect, cut the red tape and call your storage guy on the phone. How in the world can we speak to your bureaucracy's procedures? (Read: you are asking the wrong people.)

udaya_fm · 02-01-2012, 12:05 AM

Hi Anomie,

I am asking general procedure to request for new LUN. What are the details for ex: FC details we have to provide and how to find those details(commands)? Could you please help me regarding this?

Thanks
uday

anomie · 02-01-2012, 12:18 PM

I still don't understand what you are asking. If this is the first time you've requested a LUN from your storage group, then write them with something similar to:

"Hi, I am requesting a new LUN for server label FOO in rack # N69. The LUN needs to be 500GB, and should be presented to host foo.local. For zoning, my HBA WWNs are 0xaaaaaaaaaaaaaaaa and 0xbbbbbbbbbbbbbbbb. Please contact me if you need any more information."

Then, after you hear back, document the type information they want from you, so that you can make an intelligent LUN request next time.

BTW, to find HBA WWNs, use:

Code:

# systool -c fc_host -v

(You want port_name, not node_name.)

pantdk · 02-01-2012, 01:29 PM

Hi

your will provided WWN Number to the storage team then they will check that WWN number at their end & identify which WWN ID is free from the new lun which u required or if YOU want to extend any lun then they will extended that lun at their end
after that you have to work on that one. it's depend whether it is used as LVM or With out LVM.

so first you will give the WWN Number
As previously "anomie" mention the "systool -c fc_host -v"

port_name = ""(this is the number which u have to give to the storage team
port_state = "" (Port online or offline )
port_type = ""(Type of port )
speed = "" (about speed

udaya_fm · 02-08-2012, 03:56 AM

Hi anomie,pantdk,

Thanks for your time and reply. How to find whether they (storage team) have allotted the new requested LUN to specified server? Please explain.

-S.Udayakumar

yngmike · 02-08-2012, 11:47 AM

This is probably what you are looking for. This doc explains how to determine which LUN ID's are mapped to which block device detected on the system.
http://www.askwillis.com/?p=40
-Willis

pantdk · 02-14-2012, 07:45 AM

first scan

Quote:

# echo "- - -" >/sys/class/scsi_host/host#/scan (new lun scan)

#cat /proc/scsi/scsi
or get these information from below command
C – Channel on the HBA
T – SCSI target id
L – LUN id
# systool -c fc_transport -v ( it provided HBA number,channel on HBA,SCSI Target id
# systool -c fc_host -v (it provided HBA's wwn id)

sg_map -x (it provided Host, Bus, Target, Lun)

http://www.torontoaix.com/linux-how-...tips/wwn-linux

example of netapp san storage how to assign lun & how to scan at linux end

http://www.unixinfo.nl/

full Details of the Lun id,label,path,uuid

Quote:

[root@dk ~]# cd /dev/disk/by-path/ (example of openfile which is used as scsi disk)
[root@dk by-path]# multipath -ll
mpathb (14f504e46494c45006c71646451642d7244504f2d78396a39) dm-2 OPNFILER,VIRTUAL-DISK
size=5.1G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 4:0:0:1 sdd 8:48 active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 3:0:0:1 sdg 8:96 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 5:0:0:1 sde 8:64 active ready running
mpatha (14f504e46494c45006462314b72682d476f35732d346c6241) dm-1 OPNFILER,VIRTUAL-DISK
size=4.9G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 5:0:0:0 sdc 8:32 active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 4:0:0:2 sdf 8:80 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 3:0:0:2 sdh 8:112 active ready running
[root@dk by-path]# ls
ip-172.16.11.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.5ce8f6c57b87-lun-1 pci-0000:00:10.0-scsi-0:0:0:0
ip-172.16.11.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.5ce8f6c57b87-lun-2 pci-0000:00:10.0-scsi-0:0:0:0-part1
ip-172.16.11.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.afce138e6d16-lun-0 pci-0000:00:10.0-scsi-0:0:0:0-part2
ip-172.16.11.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.afce138e6d16-lun-1 pci-0000:00:10.0-scsi-0:0:0:0-part3
ip-192.168.45.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.5ce8f6c57b87-lun-1 pci-0000:00:10.0-scsi-0:0:1:0
ip-192.168.45.100:3260-iscsi-iqn.2006-01.com.openfiler:tsn.5ce8f6c57b87-lun-2 pci-0000:00:10.0-scsi-0:0:1:0-part1
pci-0000:00:07.1-scsi-1:0:0:0
[root@dk by-path]#

This is a full details which you can use

Quote:

[root@dk ~]# cd /dev/disk/by-
by-id/ by-label/ by-path/ by-uuid/

udaya_fm · 02-16-2012, 06:24 AM

Hi Pantdk,

Thanks a lot for your info. It is very helpful.

-S.Udayakumar

pantdk · 02-16-2012, 03:42 PM

if it's sufficient,then mark as solve

jnreddy · 02-18-2012, 10:02 PM

its very helpful