On Wed, Aug 1, 2012 at 6:59 PM, Canek Peláez Valdés <can...@gmail.com> wrote: > On Wed, Aug 1, 2012 at 6:34 PM, Alex Schuster <wo...@wonkology.org> wrote: >> Hi there! >> >> I do not understand the numbering of my hard drives. There may be some >> inherent logic, but whenever I make some changes, like replacing drives, >> or changing BIOS settings, the order changes. Maybe it's even more random. >> >> So I made some udev rules like this, and my drives are called /dev/hd1, >> hd2 and hd3: >> >> SUBSYSTEMS=="scsi", KERNEL=="sd?", ATTRS{model}=="SAMSUNG HD154UI", >> SYMLINK="hd1" >> >> This works fine, and this way I can address them in scripts, smartd and >> hdparm config files and such. But now I have two identical drives. I had >> this before with the drive above, but while being identical models, the >> two drives differed a little in size, so I just had to add ATTR{size}. >> This does not help with my current drives, and I find nothing >> in /sys/block/sd?/device/ that differs. Could there be another way to >> distinguish the drives, like looking at the partition scheme or something? > > If you want to distinguish partitions, I would recommend using labels > (in fstab too); those never change unless you specifically change > them. Then, no matter how you put them in your machine, they will get > mounted correctly, and then you don't need to fuzz with udev rules. > Also, as a superficial bonus, they get mounted using the label and it > looks nice in your file browser. > > The drives themselves I see no reason to recognize them, why do you > need to do that?
Oh, and I forgot; doesn't the links in /dev/disk/by-id, /dev/disk/by-label, /dev/disk/by-uuid do what you want to? Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México