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On 10/05/2011 12:25 PM, Bill Bogstad wrote: > This isn't a reply to any particular message on this thread, but I > haven't seen anyone mention the /dev/disk directory yet. On my > Ubuntu systems, it contains subdirectories by-uuid, by-label, > by-path, etc. Those sub-directories contain symlinks to the more > traditional sd or mapper names for drives. I assume this is done by > udev or something so it might not be usable in early boot scripts, but > it can certainly be used for anything run after the system is fully > booted. Admittedly, those symlinks are relative which makes things > ugly, but readlink solves that problem. For example, > > readlink -e /dev/disk/by-label/os_part > > returns > > /dev/sda6 > > on one of my systems. > > Judicious labeling of the partitions with human recognizable names is > in my opinion even better then static sd* names. > > This doesn't solve the problem of actually figuring out which physical > drive is actually sda vs sdc. I've been forced to eject CD drives (in > systems with more then one), force artificially high IO rates (using > per-drive activity LEDs), or seek rates (detected by vibration) to do > so in the past. There is a possibility that the by-path subdirectory > (which refers to buses/slots) might help in this regard, but I don't > have any experience to confirm this. RHEL also has /dev/disk as does Fedora. -- Jerry Feldman <gaf at blu.org> Boston Linux and Unix PGP key id:3BC1EB90 PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66 C0AF 7CEA 30FC 3BC1 EB90
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