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Old 11-16-2013, 11:33 PM   #1
bkarthick
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How to identify new lun in server if powerpath is not installed


Hi,

How to identify new lun in a linux box if powerpath is not installed.

New lun has been assigned to linux host. Lun or device id is (028b).

I scanned the new lun using native linux command.

Is there any command to see the new lun.
 
Old 11-18-2013, 04:41 AM   #2
voleg
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Had written HOWTO LUNs on Linux using native tools some time ago.
 
Old 11-19-2013, 11:36 AM   #3
bkarthick
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Quote:
Originally Posted by voleg View Post
Had written HOWTO LUNs on Linux using native tools some time ago.

Hey voleg,

Thanks this was very helpful.

i have one more question.

We have insstaled 2 hba with 2 port in server connected to emc storage box.Also we have installed powerpath.

[root@oracle ~]# lspci | grep -i hba
06:00.0 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 03)
06:00.1 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 03)
0c:00.0 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 03)
0c:00.1 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 03)
[root@oracle ~]#

[root@oracle ~]# powermt display
Symmetrix logical device count=18
CLARiiON logical device count=0
Hitachi logical device count=0
HP xp logical device count=0
Ess logical device count=0
Invista logical device count=0
==============================================================================
----- Host Bus Adapters --------- ------ I/O Paths ----- ------ Stats ------
### HW Path Summary Total Dead IO/Sec Q-IOs Errors
==============================================================================
1 qla2xxx optimal 18 0 - 0 0
2 qla2xxx optimal 18 0 - 0 0
[root@oracle ~]#


[root@oracle ~]# cd /sys/class/fc_host/
[root@oracle fc_host]# ll
total 0
drwxr-xr-x 3 root root 0 Nov 17 03:00 host1
drwxr-xr-x 3 root root 0 Nov 15 12:24 host2
drwxr-xr-x 3 root root 0 Nov 15 12:24 host3
drwxr-xr-x 3 root root 0 Nov 15 12:24 host4
[root@oracle fc_host]#
In the above output shows 2 hardware paths. what does numbers mean next to qla2xxx (i,e 1 & 2).

Are these numbers configured during powerpath installation or from storage side.

Please explain in detail.
 
Old 11-20-2013, 02:58 AM   #4
voleg
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Quote:
We have insstaled 2 hba with 2 port in server connected to emc storage box.Also we have installed powerpath.
Using PowerPath have no added value except paying to EMC.

What is your question? What to explain ? You have 4 FC ports, great. Next step is to use them.
 
Old 11-20-2013, 08:59 AM   #5
bkarthick
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==============================================================================
----- Host Bus Adapters --------- ------ I/O Paths ----- ------ Stats ------
### HW Path Summary Total Dead IO/Sec Q-IOs Errors
==============================================================================
1 qla2xxx optimal 18 0 - 0 0
2 qla2xxx optimal 18 0 - 0 0

in the above output numbers 1 & 2 refers to fc port ?
 
Old 11-20-2013, 09:37 AM   #6
voleg
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It is about adapter number.
 
  


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