Re: [gentoo-user] help with Persistent hard disk device names with udev

[J. Roeleveld]

On Monday 30 August 2010 15:00:28 Pau Peris wrote:
> Hi, i would like to give persistent device names to the system hard
> drives (just renaming its original device name to the one i want using
> its serial number as identifier). I've created the following rules
> which are not currently working. I'm trying to use device serial
> numbers to properly set its device name. One of the main reasons for
> doing that is i have a RAID composed by 3 disk (let's say sda sdc sdd)
> and when i plug another 4 disks sda becomes sde, sdc becomes sdg and
> so on while new drives take old device names, that's why i would like
> to make it sure device names remains always the same.
> Here are the rules
> Código:
>
> SUBSYSTEM=="block", ATTR{serial}="VNVB05G2RKTRZH", NAME="hda"
> SUBSYSTEM=="block", ATTR{serial}="9QK0T4WM", NAME="sda"
> SUBSYSTEM=="block", ATTR{serial}="3QD0X58D", NAME="sdb"
> SUBSYSTEM=="block", ATTR{serial}="9QK0RS9G", NAME="sdc"
> SUBSYSTEM=="block", ATTR{serial}="9VP0SBVN", NAME="sdc"
>
> KERNEL=="hd*", SUBSYSTEM=="block", ATTR{serial}="VNVB05G2RKTRZH",
> NAME="hda%n" KERNEL=="sd*", SUBSYSTEM=="block", ATTR{serial}="9QK0T4WM",
> NAME="sda%n" KERNEL=="sd*", SUBSYSTEM=="block", ATTR{serial}="3QD0X58D",
> NAME="sdb%n" KERNEL=="sd*", SUBSYSTEM=="block", ATTR{serial}="9QK0RS9G",
> NAME="sdc%n" KERNEL=="sd*", SUBSYSTEM=="block", ATTR{serial}="9VP0SBVN",
> NAME="sdc%n"
>
> Should this work? Do some one know how can i get it to work? thanks in
> advanced

Hi,

You need to use double "=" for all the fields you want to match.
In other words, for sda, you need to use:
> SUBSYSTEM=="block", ATTR{serial}=="9QK0T4WM", NAME="sda"
instead of:
> SUBSYSTEM=="block", ATTR{serial}="9QK0T4WM", NAME="sda"

Otherwise it doesn't match it correctly or will try to change the serial for 
the all the block-devices it finds.

(I found this out when trying to rename my network-interfaces)

--
Joost