linux-kernel - Re: Detection of Advanced Format drives

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Message-ID: <CANLaLhYrnt-UEcQ04h=BZF1R6FSDDGg8MsDebPixHti9Hk6OJA@mail.gmail.com>
Date:	Wed, 28 Sep 2011 00:48:46 +0530
From:	Arun <engineerarun@...il.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	Joshua Scoggins <theoretically.x64@...il.com>,
	Mike Snitzer <snitzer@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: Detection of Advanced Format drives

Thanks for confirming "hdparm -I" Martin... I guessed it would resolve
my detection problem but was not quite sure as I'm still waiting to
get the drive and had some time to get my hands dirty :)

Thanks everyone for taking interest in my problem.

Regards,

Arun



On Wed, Sep 28, 2011 at 00:29, Martin K. Petersen
<martin.petersen@...cle.com> wrote:
>>>>>> "Arun" == Arun  <engineerarun@...il.com> writes:
>
> Arun> Should I suppose that it is an already available piece of
> Arun> information to the userland?
>
> Yes, in the sysfs locations Mike mentioned:
>
>  /sys/block/foo/queue/physical_block_size
>
> Or you can use the BLKPBSZGET ioctl.
>
>
> Arun> Or do I need to modify the hdparm/fdisk code to get this piece of
> Arun> info?
>
> Recent hdparm versions will also report the right thing:
>
> # hdparm -I /dev/sdc | grep Sector
>        Logical  Sector size:                   512 bytes
>        Physical Sector size:                  4096 bytes
>        Logical Sector-0 offset:                512 bytes
>
> --
> Martin K. Petersen      Oracle Linux Engineering
>
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