lkml.org 
[lkml]   [2011]   [May]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: USB stick as root device does not work
[adding cc: of linux-usb mailing list]

On Sun, 22 May 2011 16:13:17 +0200 Micha Nelissen wrote:

> Hi,
>
> Using USB stick as root device does not work for me. I specify
> 'root=/dev/sdb1 rootwait' on the kernel commandline, but the kernel does
> not wait for the USB stick to be scanned and its partitions found. I
> have a harddisk which is /dev/sda, and this USB stick would be /dev/sdb.
>
> I think blk_lookup_devt returns the block device number even if it does
> not exist yet, and init/do_mounts.c:473 therefore skips waiting:
>
> if ((ROOT_DEV == 0) && root_wait) {
>
> due to ROOT_DEV having become non-zero already.
>
> If I use the commandline: 'root=/dev/sdb1 rootdelay=5' then it does
> mount and boot properly. However, using rootwait seems safer and faster
> to me, that it's meant for this use case.
>
> Thanks for any pointers,
>
> Micha
> --

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***


\
 
 \ /
  Last update: 2011-05-23 19:17    [W:0.035 / U:2.784 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site