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