RHEL3 & RHEL4 and SAN - EVA5000

[Ed Wilts]

On Tue, Aug 16, 2005 at 08:16:28AM -0000, Finnur Örn Guðmundsson - TM Software Skyggnir wrote:
> Hello,
> 
> I'm running RHEL3 and RHEL4 on IBM Blades (HS20). They are booted of SAN.

First, let's be clear about the support you can get in this
configuration.  There are *NO* support options from Red Hat for
connecting to an active/passive controller like the EVA5000 today.
This is true for both RHEL3 and RHEL4.  

This may soon change for RHEL4, but in the meantime, you're basically on
your own (or in the same boat as the rest of us).

> I have been wanting to be able to add drives from the SAN on-the-fly.
> After reading alot of text i came to the conclusion that RHEL4 is not
> able to do this...yet atleast unless you install the driver from
> Qlogic, (dont use the come that comes with the RHEL4 kernels)...witch
> is pretty sad for a enterprise grade distrib....atleast include
> rescannable san drivers please! ;).

Please read the ongoing discussion in nahant-list on multipathing.  It
sums up the current and future states but unfortunately nobody from Red
Hat is stepping forward to give us definitive answers.

> But,
> 
> RHEL3 is supposed to be able to do this. I have tried pretty much
> anything out there as:
> 
> scsidev 2.35 rescan-scsi-bus.sh
> 
> And here is something i tried: #!/bin/bash echo "scsi-qlascan" >
> /proc/scsi/qla2300/0 (After this i dont see any extra lun if i cat
> /proc/scsi/qla2300/0) echo "scsi-qlascan" > /proc/scsi/qla2300/1 echo
> "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
> 
> 
> The system is running 2.4.21-32.Elsmp.
> 
> Using the RHEL3 Qlogic drivers.
> 
> The HSV is: EVA 5000.

HP provides the fibreutils package that includes a utility to do this.
I haven't needed it yet but you can try it and see if it works for you.
Here's the direct link:
http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?pnameOID=315741&locale=en_US&taskId=135&prodTypeId=12169&prodSeriesId=315739

It's possible it just does the commands you've listed above - like I
said, try it and see what happens (or at least dig through the sources).

Here's the link for the rest of the HP software suite related to the
FCA2214 HBA:

http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?pnameOID=315741&locale=en_US&taskId=135&prodTypeId=12169&prodSeriesId=315739

Cheers,
        .../Ed
-- 
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts at ewilts.org
Member #1, Red Hat Community Ambassador Program