Re: How do I tell when a USB disk is ready?

[Gary Thomas <gary@mlbassoc.com>]

[-- Attachment #1: Type: text/plain, Size: 720 bytes --]

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"