linux-kernel - Re: Detection of Advanced Format drives

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Message-ID: <yq1pqdea8vo.fsf@sermon.lab.mkp.net>
Date:	Thu, 16 Feb 2012 14:14:19 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Arun <engineerarun@...il.com>
Cc:	NamJae Jeon <linkinjeon@...il.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Mark Knecht <markknecht@...il.com>,
	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

>>>>> "Arun" == Arun  <engineerarun@...il.com> writes:

Arun> [...] couldn't find any direct way of detecting an SSD drive like
Arun> an ioctl.

Arun> Is there any such direct way of detecting SSD drives yet? I am
Arun> working on kernel version 2.6.32-19.

You can check /sys/block/foo/queue/rotational.

The matching BLKROTATIONAL ioctl didn't go in until very recently.

-- 
Martin K. Petersen	Oracle Linux Engineering
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