From: Peter Rajnoha <prajnoha@redhat.com>
To: device-mapper development <dm-devel@redhat.com>
Cc: Lupin Deterd <lupindeterd@gmail.com>
Subject: Re: Controlling the sequence of dm-* creation
Date: Wed, 28 Nov 2012 11:45:38 +0100 [thread overview]
Message-ID: <50B5EB52.3010800@redhat.com> (raw)
In-Reply-To: <50B5E26F.7040501@redhat.com>
On 11/28/2012 11:07 AM, Zdenek Kabelac wrote:
> Dne 28.11.2012 01:52, Lupin Deterd napsal(a):
>> Hi,
>>
>> Is there a way to control how a dm- # devices created? e.g by udev or
>> multipath?
>>
>> Let say, I wanted to have my dm- devices created for multipath devices
>> to start only on dm-7 to dm-9, instead of using lower numbered
>> dm-[0-8] as it's been mapped to a different lun. Is this possible?
>
> You cannot control the order of 'dm-X' devices (they are created in
> kernel).
>
> Actually you should never ever use these names in userspace anywhere -
> since they are pretty random.
>
> You should reference your devices via UUID or VG/LV names in case you
> are using lvm.
>
...or just the device-mapper name (/dev/mapper/*). Also, node rename
is not supported by udev anymore, so it's not even possible these days
(the only exception are network devices).
Peter
prev parent reply other threads:[~2012-11-28 10:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 0:52 Controlling the sequence of dm-* creation Lupin Deterd
2012-11-28 10:07 ` Zdenek Kabelac
2012-11-28 10:45 ` Peter Rajnoha [this message]
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