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From: James Bottomley <James.Bottomley@SteelEye.com>
To: Theodore Tso <tytso@mit.edu>
Cc: Neil Brown <neilb@suse.de>, "H. Peter Anvin" <hpa@zytor.com>,
	Ric Wheeler <ric@emc.com>, Linux-ide <linux-ide@vger.kernel.org>,
	linux-scsi <linux-scsi@vger.kernel.org>,
	linux-raid@vger.kernel.org, Tejun Heo <htejun@gmail.com>,
	Mark Lord <mlord@pobox.com>, Jens Axboe <jens.axboe@oracle.com>,
	"Clark, Nathan" <Clark_Nathan@emc.com>,
	"Singh, Arvinder" <Singh_Arvinder@emc.com>,
	"De Smet, Jochen" <DeSmet_Jochen@emc.com>,
	"Farmer, Matt" <Farmer_Matt@emc.com>,
	linux-fsdevel@vger.kernel.org, "Mizar,
	Sunita" <Mizar_Sunita@emc.com>
Subject: Re: end to end error recovery musings
Date: Mon, 26 Feb 2007 09:17:19 -0600	[thread overview]
Message-ID: <1172503039.3344.4.camel@mulgrave.il.steeleye.com> (raw)
In-Reply-To: <20070226132511.GB8154@thunk.org>

On Mon, 2007-02-26 at 08:25 -0500, Theodore Tso wrote:
> Somewhat off-topic, but my one big regret with how the dm vs. evms
> competition settled out was that evms had the ability to perform block
> device snapshots using a non-LVM volume as the base --- and that EVMS
> allowed a single drive to be partially managed by the LVM layer, and
> partially managed by evms.  

If all you want is a snapshot, md can do this today ... you just create
a RAID-1 resync it and then break it ... of course, you have to have the
filesystem mounted above an md device initially ...

James



  parent reply	other threads:[~2007-02-26 15:17 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-23 14:15 end to end error recovery musings Ric Wheeler
2007-02-23 14:15 ` Ric Wheeler
2007-02-24  0:03 ` H. Peter Anvin
2007-02-24  0:37   ` Andreas Dilger
2007-02-24  2:05     ` H. Peter Anvin
2007-02-24  2:32     ` Theodore Tso
2007-02-24 18:39       ` Chris Wedgwood
2007-02-26  5:33       ` Neil Brown
2007-02-26 13:25         ` Theodore Tso
2007-02-26 15:15           ` Alan
2007-02-26 15:18             ` Ric Wheeler
2007-02-26 17:01               ` Alan
2007-02-26 16:42                 ` Ric Wheeler
2007-02-26 15:17           ` James Bottomley [this message]
2007-02-26 18:59           ` H. Peter Anvin
2007-02-26 22:46           ` Jeff Garzik
2007-02-26 22:53             ` Ric Wheeler
2007-02-27  1:19               ` Alan
2007-02-26  6:01   ` Douglas Gilbert
2007-02-27  1:10 Moore, Eric
2007-02-27  1:10 ` Moore, Eric
2007-02-27 16:50 ` Martin K. Petersen
2007-02-27 16:50   ` Martin K. Petersen
2007-02-27 18:51   ` Ric Wheeler
2007-02-27 19:02   ` Alan
2007-02-27 19:02     ` Alan
2007-02-27 18:39     ` Andreas Dilger
2007-02-27 19:07     ` Martin K. Petersen
2007-02-27 19:07       ` Martin K. Petersen
2007-02-27 23:39       ` Alan
2007-02-27 23:39         ` Alan
2007-02-27 22:51         ` Martin K. Petersen
2007-02-27 22:51           ` Martin K. Petersen
2007-02-28 13:46           ` Douglas Gilbert
2007-02-28 17:16             ` Martin K. Petersen
2007-02-28 17:30               ` James Bottomley
2007-02-28 17:42                 ` Martin K. Petersen
2007-02-28 17:52                   ` James Bottomley
2007-03-01  1:28                     ` H. Peter Anvin
2007-03-01 14:25                       ` James Bottomley
2007-03-01 17:19                         ` H. Peter Anvin
2007-02-28 15:19       ` Moore, Eric
2007-02-28 15:19         ` Moore, Eric
2007-02-28 17:27         ` Martin K. Petersen

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