linux-kernel - Re: [PATCH 4/5] ide: Add support for TRIM

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Message-ID: <20090408071404.GA2656@gentoox2.trippelsdorf.de>
Date:	Wed, 8 Apr 2009 09:14:04 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Mark Lord <liml@....ca>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Matthew Wilcox <willy@...ux.intel.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	David Woodhouse <David.Woodhouse@...el.com>
Subject: Re: [PATCH 4/5] ide: Add support for TRIM

On Tue, Apr 07, 2009 at 03:58:41PM -0400, Mark Lord wrote:
> Markus Trippelsdorf wrote:
> > On Tue, Apr 07, 2009 at 01:57:54PM -0400, Mark Lord wrote:
> >> Are there any commercially available SSDs that have this feature yet?
> >> Anyone know which ones?
> > 
> > OCZ will release a new firmware for their Vertex line in the coming
> > days, which will feature ATA TRIM support.
> > And since they get their firmware directly from Indilinx, all SSDs
> > with this controller will be TRIM ready in the future.
> > 
> > http://www.ocztechnologyforum.com/forum/showthread.php?t=54373
> ..
> 
> Mmm.. sounds like they really don't understand "standards" there.
> All of that nonsense about waiting until their proprietary "trim utility"
> is working on Windows-7 before looking at a Linux implementation.
> 
> WTF?  So long as they implement the required ATA opcode (correctly),
> then it should "just work" fine on Linux.  But that Windows-centred
> discussion there really doesn't sound encouraging.
> 
> But hey, if they do get their act together, then the Vertex series
> are supposedly the second-best consumer SSDs available these days,
> after the highly touted/priced Intel ones.  :)

The new firmware is out and looks promising:

########## Begin SSD TRIM output ##########
word21 bit10 = 1: support for the DATA SET MANAGEMENT is changeable.
word169 bit0 = 1: device supports the Trim bit of DATA SET MANAGEMENT command.
  word69 bit14 = 1: Trim function of the DATA SET MANAGEMENT command supports determinate behavior.
########## End SSD TRIM output ##########

This is the output from a modified hdparm, that checks the relevant
bits. 

(I didn't run hdparm on my machine, because I'm waiting for a flasher that
doesn't require XP. I just copied the output from:
http://www.ocztechnologyforum.com/forum/showpost.php?p=371277&postcount=28 )

-- 
Markus
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