Re: How to map ata_link to physical link and ata_port to physical port

From: Yang Bai
Date: Mon Jul 16 2012 - 21:59:56 EST

CC-ed Gwendal and Jeff


On Mon, Jul 16, 2012 at 11:09 AM, Yang Bai <> wrote:
> Hi hackers,
> In our internal usage, we want to map the disk in system like
> sd{a,b,c} to physical disk slot. When the disk is attached to LSI HBA
> card, we find that we can rely on the phy attribute of the disk to
> find the slot since this attribute does not change no matter which
> kind of disks we attach or what order we attach the disks. But when
> doing this for AHCI, we do not find an attribute that we can rely on
> it to map the disk to slot. No matter ata_port number or ata_host
> number, when we changed the order we attached the disks to slots, they
> changed.
> So I want to know is there some attribute we can get from AHCI that
> map the logical disk to physical slot?
> Thanks,
> Yang

Keep It Simple,Stupid.

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