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SubjectRe: What still uses the block layer?
Alan Cox wrote:
>> You can pull a Model and Serial number via hdparm -i, but it's not as
>> easy to manipulate as a fixed-length MAC address. That's why people
>> tend to use filesystem UUID's.
>
> ATA8 at the moment looks set to add a true "MAC" or "WWN" type identifier
> to each device.. Right now model/serial is not always unique.

WWN was added in ATA-7, AFAICS.

However, I've seen quite a few ATA-7 devices that do not bother to fill
it in. I wonder if ATA-8 device firmwares will act with similar
slackness. :)

Jeff



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