Red Hat 5.4 SAN attachement query

[nyck]

Hello,

I have one of our RH servers connected up to our CX300 SAN and I have been allocating LUNS:-

Pseudo name=emcpowera
CLARiiON ID=CK200043600821 [LONLIN5]
Logical device ID=60060160901012003E9EB8CB8EDADE11 [LUN 11]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sdd SP A1 active alive 0 0
4 qla2xxx sdg SP B1 active alive 0 0

Above is an example of one of these, but I noticed today that after I allocated another LUN and then perfromed a reboot the I/O Paths had changed. SO instead of being sdd & sdg they were sdd & sdh. Is this a problem?

Other than that everything is working fine

 

[fugtruck]

I believe any time you add or remove LUNs, the paths are subject to change.

 

[Annihilannic]

You should probably be referring to them by their /dev/emcpower[a-z] device names, which should not change across reboots.

Annihilannic.

 

[nyck]

Hello,

After a reboot of this server I have the following:-

Pseudo name=emcpowera
CLARiiON ID=CK200043600821 [LONLIN5]
Logical device ID=60060160901012003E9EB8CB8EDADE11 [LUN 11]
state=alive; policy=BasicFailover; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
4 qla2xxx sdd SP A1 active alive 0 0
4 qla2xxx sdh SP B1 active alive 0 0

As you can see for emcpowera the I/O Paths have changed to sdd/sdh from sdd/sdg.

Is this an issue, if so what do I need to do to resolve this?

The server has been rebooted multiple times and there is not an issue with the file systems under powerpower control what so ever.

 

[Annihilannic]

That is normal, you don't need to do anything to resolve it.

What is the output of mount (so we can see what types of filesystem you have and which devices they are mounted from)?

Annihilannic.