Re: Setting /sys/block/sdb/device/max_sectors permanently to 128 for specific device

[Lorenzo Sutton <lorenzofsutton@gmail.com>]

On 12/09/12 17:13, Camaleón wrote:
> On Tue, 11 Sep 2012 23:15:51 +0200, Lorenzo Sutton wrote:
>
> (...)
>
> > Googling provided a solution which seems to work [1][2] which consists
> > in setting max_sectors to 128 istead of the default 240.
> >
> > I can do that as root manually but I'd like to have it done
> > automatically when the device is mounted. My understanding is that a
> > udev rule has to be created, I would appreciate some help on:
> The second link you sent provides some hints for the udev rule (see
> comment #12 and/or #74), you may only have to accomodate the rule for
> your Debian version.
Thanks, I had seen #12 but not #74 (I realised Launchpad was hiding 
it??) which seems very detailed and a good starting point.
> > - Where to put the rule
> Udev rules go under "/etc/udev/rules.d/".
Ok
> > - What to put as the vendor (link [2] mentions vendor) and how to
> > discover it so that the rule only applies to that very device.
> (...)
>
> You can use something like "udevadm info --query=all --path=/sys/block/
> sdb | grep -i vendor" to find out.
>
> More info about udev:
>
> http://wiki.debian.org/udev
>
> Greetings,
Thanks for your help.
Lorenzo.