Detecting New SAN LUN in RHEL5

[Young, Mike]

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-bounces at redhat.com [mailto:redhat-list-bounces at redhat.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.Young at atosorigin.com>
> To: "General Red Hat Linux discussion list" <redhat-list at redhat.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-bounces at redhat.com [mailto:redhat-list-bounces at redhat.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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