Hi
On Friday 20 November 2009, Larry Finger wrote:
> On 11/20/2009 05:12 AM, Michael Buesch wrote:
[...]
> You might look at the "root=" part of /proc/cmdline. Mine says
> "root=/dev/disk/by-id/ata-TOSHIBA_MK2546GSX_18C2P0KCT-part1". That disk serial
> number would certainly be unique. Even if it just said "root=/dev/sda1", it
> would be repeatable.
[...]
"by-id" has the disadvantage that it changes with the means of accessing
the disk, namely if your driver uses the old (obsolete) ide API or is a new
libata driver.
Technically only "by-uuid" is relatively guaranteed to be stable (unless a
partition gets cloned with dd), with "by-label" coming close (only bad if
any disk or USB storage device duplicates an existing label, like "root").
Regards
Stefan Lippers-Hollmann
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