Re: State of the PA-RISC/HPPA port (August 2013)
On Sun, Aug 4, 2013 at 8:38 AM, John David Anglin <dave.anglin@bell.net> wrote:
...
> The root= parameter mostly works for me. However, different kernels
> sometimes change the order of disk discovery when you have multiple
> drives. Helge thinks it would be easy to specify file system by uuid.
Helge is as usual correct. One can also specify a root=LABEL=foo parameter.
I suspect the async SCSI bus scanning (added in 2.6.20) is not helping
here. Set SCSI_SCAN_ASYNC to N and discovery order should be more
consistent.
> I have an inexpensive portable USB drive connected to one of my systems. It
> comes up as /dev/sda at boot and messes up the drive order. Not exactly plug and play...
Right. Linux doesn't have a registry for /dev/sdX names and I don't
think it ever will. Using root=UUID=xxx or root=LABEL=foo is plug and
play friendly.
I believe LABEL comes from the partition table and UUID from the file
system. But double check that.
cheers,
grant
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