Re: root on sd0a on odroid-c1

[Andrew Cagney <andrew.cagney%gmail.com@localhost>]

On 22 February 2016 at 12:46, Andrew Cagney <andrew.cagney%gmail.com@localhost> wrote:
> On 20 February 2016 at 17:14, Michael van Elst <mlelstv%serpens.de@localhost> wrote:
>> andrew.cagney%gmail.com@localhost (Andrew Cagney) writes:
>>
>>>so I simply added root=sd0a to /boot/boot.ini's boot line.  That resulted in:
>> [...]
>>>use one of: awge0 ld0[a-p] ddb halt reboot
>>
>>>Should this have worked?
>>
>> Apparently not, as there is no sd0a boot device.

Just FYI,

Tried a similar configuration on the Pi (i.e., same physical disk, but
did add ta powered USB hub), and it's working fine.  Hmm, perhaps it
is a power issue.

Andrew

>>>However, I get the feeling that there's more going on.  For instance,
>>>just adding an entry to /etc/fstab to mount of /dev/sd0a on /mnt fails
>>>during boot (fsck can't access /dev/rsd0a during the boot).  Yet once
>>>the system is booted it works fine.
>>
>> The USB disk is probably starting too slowly to be recognized at this
>> point. There needs to be some kind of spin-up delay in the kernel to
>> handle this situation.
>
> Ah.
>
> Is there any existing kernel event that would indicate a disk device
> has come on line?
>
> Andrew