Re: how to disable partition search?

[Luca Berra <bluca@comedia.it>]

On Wed, Mar 26, 2008 at 12:43:41PM +0100, Ferenc Wagner wrote:
>Hi,
>
>I use an FC SAN, which provides multiple pathes to multiple LUNs.
>These all come up as different sd* devices, exhausting single letter
>names.  I mean they are a LOT.  Using the md mulitpath driver
>everything works perfectly, no problems there.  However, during boot,
>the kernel tries to read the partition table from each device,
>spitting out hundreds of lines of error messages: most of the devices
>aren't even readable, and those which are, don't contain a valid
>partition table.  They never will.  So I'd like to disable partition
>detection, because these messages overflow the kernel message buffer,
>depriving syslog of gathering any useful boot messages, and also
>needlessly lengthening the boot process.  (Of course the noise alone
>is disturbing enough when one tries to troubleshoot a boot problem.)
>However, looking at the kernel sources didn't give me any hint.  Is
>this possible to disable at all?

you could try bugging lkml until it dawns on them that partition
detection code should belong in userspace by default :)

anyway you can rebuild your own kernel disabling it
just set PARTITION_ADVANCED, and disable all partition types.

you should be aware that doing this will disable partition detection on
all drives, so if you have partitioned drives (eg boot drives) you have
to run partx in initramfs or it wont be able to access them.

L.


-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
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