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

[David Relson <relson@osagesoftware.com>]

My udev rules use a combination of KERNEL, ATTRS(serial), and SYMLINK to
create named entries in /dev for my 2 USB hard drives.

With the following rules in /etc/udev/rules.d/10-local.rules: 

KERNEL=="sd*", ATTRS{serial}=="FD...7264507", SYMLINK+="WD1" 
KERNEL=="sd*", ATTRS{serial}=="FD...7285643", SYMLINK+="WD2"

Plugging them in results in /dev entries like:

  brw-rw----  1 root disk    8,  32 Aug 21 13:55 sdc
  lrwxrwxrwx  1 root root         3 Aug 21 13:55 WD1 -> sdc
  brw-rw----  1 root disk    8,  32 Aug 21 13:55 sdd
  lrwxrwxrwx  1 root root         3 Aug 21 13:55 WD2 -> sdd

And in /etc/fstab, I reference /dev/WD1 and /dev/WD2

HTH,

David

On Mon, 30 Aug 2010 15:00:28 +0200
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