On Mon, 2007-11-05 at 11:43 -0600, Anthony E. Caudel wrote: > Jarry wrote: > > Anthony E. Caudel wrote: > >> How does the kernel (2.6.22) determine the order of SATA drives (sda, > >> sdb, etc.) when it boots up? > > > > I just checked my computer, and sda is the drive plugged in > > the first sata-port, and sdb the one in the second port > > (according to the info in motherboard manual). > > > > Maybe it is something similar as with p-ata drives, where hda > > is always the master drive on the first pata channel... > > > > Jarry > For my mobo (Asus A8N-SLI Premium), sda is plugged into SATA slot 3. > Interestingly, it is NOT the first drive listed in the BIOS either. > > I think, but not sure, that the kernel looks at the buses to determine > the drive order. > > Maybe someone can confirm?
>From what I've heard/read, you cannot guarantee device ordering of SCSI(-like) devices. It's recommended that you use disk labels/UUIDs (and initramfs/initrd for / device). My BIOS actually lets you select with drives show up in the BIOS as well as what order. On one machine I have 8 drives but only 1 configured in the BIOS (the boot drive). However at the Linux level it shows up as /dev/sdj or something like that. But I think if I had a usb stick in plugged in while it's being booted it might show up as something different. -- [EMAIL PROTECTED] mailing list
