On Tue, 01 Nov 2011 20:00:54 -0400, Stephen Powell wrote: > On Tue, 01 Nov 2011 19:46:13 -0400 (EDT), Walter Hurry wrote: >> On Tue, 01 Nov 2011 19:43:20 -0400, Stephen Powell wrote: >>> >>> It is important that you *not* use traditional device nomenclature, >>> such as >>> >>> /dev/hda1 /dev/sda1 >> >> Why? > > Two reasons. First, whether an IDE hard disk shows up as /dev/hda, > /dev/hdb, etc. or /dev/sda, /dev/sdb, etc. depends on which drivers are > being used. For example, the 2.6.32-3-686 kernel and earlier ones use > the traditional IDE drivers, with device names /dev/hda, /dev/hdb, etc. > The 2.6.32-5-686 and later kernels use the libata SCSI emulation > drivers, with device names /dev/sda, /dev/sdb, etc. > > Second, the devices are not necessarily discovered in the same order > every time with newer kernels. Let's say you have a system with one > hard disk and one CD-ROM drive. On one boot, your hard disk may be > assigned device name /dev/sda and the CD-ROM drive may be assigned the > device name /dev/sdb. But on the next boot, it is possible that the > CD-ROM drive may be assigned the device name /dev/sda and the hard disk > may be assigned the device name /dev/sdb. You can never be sure. > By using UUIDs or LABELs, you will always get the same physical > partition mounted as the root file system every time, regardless of what > its device name happens to be in the current boot. The same applies to > non-root file sytems in /etc/fstab (i.e. /boot, /home, etc.)
But my (single internal) hard disk is always /dev/sda, and my two external USB disks are always /dev/sdb and /dev/sdc. So what difference does it make? -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/j8q3n0$eor$1...@dough.gmane.org