* How do I tell when a USB disk is ready?
@ 2011-10-25 0:10 Chris Tapp
2011-10-25 8:45 ` Gary Thomas
0 siblings, 1 reply; 3+ messages in thread
From: Chris Tapp @ 2011-10-25 0:10 UTC (permalink / raw)
To: yocto
I've got a minimal root file system that will be used to install a
poky image from a USB stick.
The init script this uses mounts sda1 (from where it's just booted),
but sda1 isn't ready when it tries to do this - I can see the bus
enumeration messages on the console after the mount fails.
How can my script test to see when the device is ready?
Chris Tapp
opensource@keylevel.com
www.keylevel.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: How do I tell when a USB disk is ready?
2011-10-25 0:10 How do I tell when a USB disk is ready? Chris Tapp
@ 2011-10-25 8:45 ` Gary Thomas
2011-10-25 12:32 ` Chris Tapp
0 siblings, 1 reply; 3+ messages in thread
From: Gary Thomas @ 2011-10-25 8:45 UTC (permalink / raw)
To: Chris Tapp; +Cc: yocto
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On 2011-10-24 18:10, Chris Tapp wrote:
> I've got a minimal root file system that will be used to install a poky image from a USB stick.
>
> The init script this uses mounts sda1 (from where it's just booted), but sda1 isn't ready when it tries to do this - I can see the bus enumeration messages on the console after the
> mount fails.
>
> How can my script test to see when the device is ready?
You could try looking for /dev/sda1 in /proc/partitions like in
attached script.
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
[-- Attachment #2: wd --]
[-- Type: text/plain, Size: 147 bytes --]
#! /bin/sh
while ! grep -q sdc1 /proc/partitions; do
echo "... waiting for disk"
sleep 1
done
echo "Disk /dev/sdc1 is ready"
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: How do I tell when a USB disk is ready?
2011-10-25 8:45 ` Gary Thomas
@ 2011-10-25 12:32 ` Chris Tapp
0 siblings, 0 replies; 3+ messages in thread
From: Chris Tapp @ 2011-10-25 12:32 UTC (permalink / raw)
To: yocto
On 25 Oct 2011, at 09:45, Gary Thomas wrote:
> On 2011-10-24 18:10, Chris Tapp wrote:
>> I've got a minimal root file system that will be used to install a
>> poky image from a USB stick.
>>
>> The init script this uses mounts sda1 (from where it's just
>> booted), but sda1 isn't ready when it tries to do this - I can see
>> the bus enumeration messages on the console after the
>> mount fails.
>>
>> How can my script test to see when the device is ready?
>
> You could try looking for /dev/sda1 in /proc/partitions like in
> attached script.
Thanks Gary, that's just what's needed :-)
Chris
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-10-25 0:10 How do I tell when a USB disk is ready? Chris Tapp
2011-10-25 8:45 ` Gary Thomas
2011-10-25 12:32 ` Chris Tapp
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