From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: TRIM vs UNMAP vs WRITE SAME and thin devices Date: Sun, 8 Feb 2009 13:44:34 -0700 Message-ID: <20090208204434.GF31509@parisc-linux.org> References: <20090123041558.GC24652@parisc-linux.org> <4979AF62.7070409@redhat.com> <1232721777.4430.7.camel@macbook.infradead.org> <498DA052.6090605@redhat.com> <87f94c370902081206v71106c5fp9a7ef0400301a1ab@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Ric Wheeler , David Woodhouse , James Bottomley , "Martin K. Petersen" , Jeff Garzik , linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, IDE/ATA development list To: Greg Freemyer Return-path: Received: from palinux.external.hp.com ([192.25.206.14]:33440 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753144AbZBHUow (ORCPT ); Sun, 8 Feb 2009 15:44:52 -0500 Content-Disposition: inline In-Reply-To: <87f94c370902081206v71106c5fp9a7ef0400301a1ab@mail.gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Sun, Feb 08, 2009 at 03:06:44PM -0500, Greg Freemyer wrote: > I found a list of T10 activities just since just Dec. 1, 2008 and it > is a bit overwhelming. (ie. 08-356r4 is but one of many recent > reports) > > http://www.t10.org/new_a.htm > > For those of us that don't live and breath the SCSI spec, is there an > overview site describing what is going on. I've been working off 08-149r7.pdf. I'm sure that's been superseded by now. > 08-356r4 SBC-3: WRITE SAME unmap bit David L. Black PDF (56608) 2008/12/10 Probably interesting. Haven't read it myself. > 08-356r5 SBC-3 Thin Provisioning Commands Fred Knight, David L. > Black PDF (387549) 2009/01/15 Fred Knight seems to be the main coordinator of this effort, so yes. > 08-149r7 SBC - Thin Provisioning Frederick Knight PDF (281001) 2008/12/08 That's the one I'm working from. > 08-149r8 SBC - Thin Provisioning Frederick Knight PDF (281387) 2009/01/09 A newer version ... thought so. > 09-011r1 SBC-3 Thin Provisioning Threshold Notification Frederick > Knight PDF (32757) 2009/01/09 Clearly related. > 08-149r9 SBC - Thin Provisioning Frederick Knight PDF (353888) 2009/01/15 Even newer version of what I've been working from. > 09-012r0 Minutes: CAP - Thin Provisioning 12/4 con-call Frederick > Knight PDF (38063) 2008/12/08 Probably tedious. > 08-396r3 SPC-4: Reporting support for all DIF types George Penokie > PDF (85358) 2009/01/14 Unrelated, I would think. I'd go with 08-149r9 to get a good overview. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."