How to find driver usage.

[Dan Track]

On Wed, Oct 14, 2009 at 4:26 PM, Bryn M. Reeves <bmr at redhat.com> wrote:
> On Wed, 2009-10-14 at 15:52 +0100, Dan Track wrote:
>> I've got two disks /dev/sda and /dev/sdb. I'd like to reload the
>> driver that they are using. How can I find out what driver is being
>> used by them?
>
> The sysfs file system (normally mounted at /sys) is your friend, e.g:
>
> $ ls -l /sys/block/sda/device/driver
> lrwxrwxrwx 1 root root 0 2009-10-14 16:16 /sys/block/sda/device/driver
> -> ../../../../../../bus/scsi/drivers/sd
>
> But this just tells us that it's being driven by the SCSI disk driver
> (sd) which is kinda obvious.
>
> A lot more information is hidden away here however - you can use tools
> like udevinfo or systool to trawl the file system and output the
> information in a more readable format.
>
> To get all attributes for sda:
>
> $ udevinfo -ap /block/sda
>
> http://pastebin.com/m1fb2047d
>
> To get device attributes for all scsi disks on the system:
>
> $ systool -c scsi_disk -v
>
> http://pastebin.com/m263ebacc
>
> Regards,
> Bryn.
>

Hi Bryn,

Many thanks for this. Lot's to learn.

Thanks
Dan