linux-kernel - Re: MD and rotational attribute

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Message-ID: <20120227114040.5b0235de@notabene.brown>
Date:	Mon, 27 Feb 2012 11:40:40 +1100
From:	NeilBrown <neilb@...e.de>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	Karel Zak <kzak@...hat.com>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org
Subject: Re: MD and rotational attribute

On Sun, 26 Feb 2012 19:18:12 -0500 "Martin K. Petersen"
<martin.petersen@...cle.com> wrote:

> >>>>> "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...
> 

Thanks!

NeilBrown

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