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From: Sander <sander@humilis.net>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Steinar H. Gunderson" <sgunderson@bigfoot.com>
Subject: Re: [PATCH 005 of 5] md: Final stages of raid5 expand code.
Date: Tue, 17 Jan 2006 10:55:31 +0100	[thread overview]
Message-ID: <20060117095531.GB27262@localhost.localdomain> (raw)
In-Reply-To: <1060117065635.27881@suse.de>

NeilBrown wrote (ao):
> +config MD_RAID5_RESHAPE

Would this also be possible for raid6?

> +	bool "Support adding drives to a raid-5 array (highly experimental)"
> +	depends on MD_RAID5 && EXPERIMENTAL
> +	---help---
> +	  A RAID-5 set can be expanded by adding extra drives. This
> +	  requires "restriping" the array which means (almost) every
> +	  block must be written to a different place.
> +
> +          This option allows this restiping to be done while the array
                                     ^^^^^^^^^
                                     restriping

> +	  is online.  However it is VERY EARLY EXPERIMENTAL code.
> +	  In particular, if anything goes wrong while the restriping
> +	  is happening, such as a power failure or a crash, all the
> +	  data on the array will be LOST beyond any reasonable hope
> +	  of recovery.
> +
> +	  This option is provided for experimentation and testing.
> +	  Please to NOT use it on valuable data with good, tested, backups.
                 ^^                             ^^^^
                 do                             without

Thanks a lot for this feature. I'll try to find a spare computer to test
this on. Thanks!

	Kind regards, Sander

-- 
Humilis IT Services and Solutions
http://www.humilis.net

  reply	other threads:[~2006-01-17  9:55 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-17  6:56 [PATCH 000 of 5] md: Introduction NeilBrown
2006-01-17  6:56 ` [PATCH 001 of 5] md: Split disks array out of raid5 conf structure so it is easier to grow NeilBrown
2006-01-17 14:37   ` John Stoffel
2006-01-19  0:26     ` Neil Brown
2006-01-21  3:37       ` John Stoffel
2006-01-22 22:57         ` Neil Brown
2006-01-17  6:56 ` [PATCH 002 of 5] md: Allow stripes to be expanded in preparation for expanding an array NeilBrown
2006-01-17  6:56 ` [PATCH 003 of 5] md: Infrastructure to allow normal IO to continue while array is expanding NeilBrown
2006-01-17  6:56 ` [PATCH 004 of 5] md: Core of raid5 resize process NeilBrown
2006-01-17  6:56 ` [PATCH 005 of 5] md: Final stages of raid5 expand code NeilBrown
2006-01-17  9:55   ` Sander [this message]
2006-01-19  0:32     ` Neil Brown
2006-01-17  8:17 ` [PATCH 000 of 5] md: Introduction Michael Tokarev
2006-01-17  9:50   ` Sander
2006-01-17 11:26     ` Michael Tokarev
2006-01-17 14:03       ` Kyle Moffett
2006-01-19  0:28         ` Neil Brown
2006-01-17 16:08       ` Ross Vandegrift
2006-01-17 18:12         ` Michael Tokarev
2006-01-18  8:14           ` Sander
2006-01-18  9:03             ` Alan Cox
2006-01-19  0:22           ` Neil Brown
2006-01-19  9:01             ` Jakob Oestergaard
2006-01-17 22:38       ` Phillip Susi
2006-01-17 22:57         ` Neil Brown
2006-01-17 14:10   ` Steinar H. Gunderson
2006-01-22  4:42 ` Adam Kropelin
2006-01-22 22:52   ` Neil Brown
2006-01-23 23:02     ` Adam Kropelin
2006-01-23  1:08 ` John Hendrikx
2006-01-23  1:25   ` Neil Brown
2006-01-23  1:54     ` Kyle Moffett

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