RE: Detecting New SAN LUN in RHEL5

Well, I finally stopped wasting time with it, and rebooted
the server.  The LUN appeared, and I have the new disk
space.  Sure would like to know how to do that without a
reboot though - especially since other versions of RHEL
could do it.  Would hate to think that this isn't an option
in RHEL5 :(

-----Original Message-----
From: Young, Mike 
Sent: Monday, April 16, 2007 10:18 PM
To: 'General Red Hat Linux discussion list'
Subject: RE: Detecting New SAN LUN in RHEL5

Plus, kudzu doesn't seem to do the trick.  Just tried and
got this in /var/log/messages:

kudzu[21227]: obsolete kudzu ddcProbe called

I'll search /proc for something I can toggle.

Thanks,
Mike.

-----Original Message-----
From: redhat-list-bouncesredhat.com
[mailto:redhat-list-bouncesredhat.com]On Behalf Of
Mark Haney
Sent: Monday, April 16, 2007 8:17 PM
To: General Red Hat Linux discussion list
Subject: Re: Detecting New SAN LUN in RHEL5

James Marcinek wrote:
> Couldn't one just run kudzu and let it discover the
devices?
>
>
>
>
>
> ----- Original Message -----
> From: "Mike Young" <Mike.Youngatosorigin.com>
> To: "General Red Hat Linux discussion list"
<redhat-listredhat.com>
> Sent: Monday, April 16, 2007 6:36:09 PM (GMT-0500)
US/Eastern
> Subject: RE: Detecting New SAN LUN in RHEL5
>
> I'd like to rescan the fiber card rather than
rebooting.  Since RHEL5 doesn't require you to load the
drivers of the vendor, none of the tools (lun_scan, et al)
are installed either.  There must be a way of detecting new
LUNs without rebooting - everything else has been pretty
automatic so far (card detection, activation, etc).
>
>  -----Original Message-----
> From:         redhat-list-bouncesredhat.com
[mailto:redhat-list-bouncesredhat.com]  On Behalf Of
Mark Haney
> Sent: Monday, April 16, 2007 5:32 PM
> To:   General Red Hat Linux discussion list
> Subject:      Re: Detecting New SAN LUN in RHEL5
>
> Young, Mike wrote:
> 
>> Hello,
>>
>> What's the method for detecting newly allocated SAN
LUNs in RHEL5?  I supposedly have a LUN allocated, but I
can't see it in /dev/cciss or /dev/sd*.
>>
>> Thanks,
>> Mike.
>>
>> 
>>   
> Did you rescan the SCSI/FC controller?  Or reboot the
machine?
>
>
> 
Personally, I'd much rather rescan the card for the new LUNs
rather than
run kudzu.  I've not had a lot of success with doing it that
way without
rebooting.


--
Mark Haney
Sr. Systems Administrator     
ERC Broadband


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