linux-kernel - Re: MD and rotational attribute

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Message-ID: <yq18vjpuo1n.fsf@sermon.lab.mkp.net>
Date:	Sun, 26 Feb 2012 19:18:12 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	NeilBrown <neilb@...e.de>
Cc:	Karel Zak <kzak@...hat.com>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org,
	"Martin K.Petersen" <martin.petersen@...cle.com>
Subject: Re: MD and rotational attribute

>>>>> "Neil" == NeilBrown  <neilb@...e.de> writes:

Neil,

Neil> (I would say that the name 'rotational' is a bug - the issues here
Neil> is really whether seek is fast or slow is it not??... but no
Neil> matter).

Both the ATA and SCSI specs use the term 'rotational' which I guess is
how we ended up with that name.

Neil> What do you think Martin?  Should QUEUE_FLAG_NONROT move to
Neil> queue_limits much like QUEUE_FLAG_CLUSTER did?

Absolutely. I posted some patches converting both the nonrot and
discard/secure discard queue flags a while back but they didn't go
in. I'll freshen up the kit and resend...

-- 
Martin K. Petersen	Oracle Linux Engineering
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