RE: HP EVA + Qlogic HBA + failover

["Frank, Ryan" <Ryan Frank allvac com>]

I use the built-in RAID tools for Linux to accomplish this... Using MDADM I am able to create devices using raid-level 'multipath'.  Looks like this...

`/usr/sbin/mdadm --create /dev/md0 --level multipath --raid-devices 2  /dev/sdc /dev/sdd`

Then I can run mdadm again to get the status:

`/sbin/mdadm -D /dev/<array device>` ex: /sbin/mdadm -D /dev/md0

This command will display results similar to the following:

mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.00
  Creation Time : Thu Oct 28 13:55:48 2004
     Raid Level : multipath
     Array Size : 545120192 (519.87 GiB 558.20 GB)
   Raid Devices : 1
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Thu Oct 28 14:01:11 2004
          State : dirty, no-errors
 Active Devices : 1
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 1


    Number   Major   Minor   RaidDevice State
       0       8       32        0      active sync   /dev/sdc
       1       8       48        1      spare   /dev/sdd
           UUID : bec54c58:346c9fb5:070e9f7a:8ceecb77
         Events : 0.4

This solution has worked great for me... 

-Ryan

-----Original Message-----
From: taroon-list-bounces redhat com [mailto:taroon-list-bounces redhat com] On Behalf Of Gabor MICSKO
Sent: Thursday, April 21, 2005 11:11 AM
To: taroon-list redhat com
Subject: HP EVA + Qlogic HBA + failover

Machine: HP Proliant DL380 
Storage: HP Enterprise Virtual Array 3000 
OS: Red Hat Enterprise Linux AS release 3 (Taroon Update) 
Kernel: 2.4.21-15.ELsmp

I have two QLogic Corp. QLA2312 Fibre Channel Adapter in HP Proliant. I
want to have redundant link to EVA (if one HBA fails -> failover to
second HBA).

My questions: 

1.) Is the qla2300 driver in Taroon failover ready?
2.) If I load the qla2300 with parameter 'ql2xfailover=1' (insmod
qla2300 ql2xfailover=1), is this enough for a full
failover-configuration or do I need to set something else?

Thanks

-- 
Micskó Gábor
HP Accredited Platform Specialist, System Engineer (APS, ASE)
Szintézis Computer Rendszerház Rt.      
H-9021 Győr, Tihanyi Árpád út 2.
Tel: +36-96-502-216
Fax: +36-96-318-658
E-mail: gmicsko szintezis hu
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