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From: Paul Clements <paul.clements@steeleye.com>
To: Dan Graham <graham@molbio.uoregon.edu>
Cc: linux-raid@vger.kernel.org
Subject: Re: Converting Ext3 to Ext3 under RAID 1
Date: Wed, 02 Aug 2006 15:31:43 -0400	[thread overview]
Message-ID: <44D0FD9F.9070605@steeleye.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0608021205110.626@molbio.uoregon.edu>

Dan Graham wrote:

>    Is this scheme even half-way sane?

Yes. It sounds correct.

>    Is 16 blocks a large enough area?

Maybe. The superblock will be between 64KB and 128KB from the end of the 
partition. This depends on the size of the partition:

SB_LOC = PART_SIZE - 64K - (PART_SIZE & (64K-1))

So, by 16 blocks, I assume you mean 16 filesystem blocks (which are 
generally 4KB for ext3). So as long as your partition ends exactly on a 
64KB boundary, you should be OK.

Personally, I would err on the safe side and just shorten the filesystem 
by 128KB. It's not like you're going to miss the extra 64KB.

--
Paul

  parent reply	other threads:[~2006-08-02 19:31 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-07-16  0:56 Can't add disk to failed raid array Paul Waldo
2006-07-16 10:19 ` Neil Brown
2006-07-16 12:24   ` Paul Waldo
2006-07-18  5:36     ` Neil Brown
2006-07-23 11:04       ` In Trouble--Please Help! (was Re: Can't add disk to failed raid array) Paul Waldo
2006-07-23 11:25         ` Neil Brown
2006-07-23 11:50           ` Paul Waldo
2006-07-23 11:53           ` Paul Waldo
2006-07-23 11:59             ` Neil Brown
2006-07-23 12:32               ` Paul Waldo
2006-07-24 18:26                 ` Dan Williams
2006-07-24 18:35                   ` Paul Waldo
2006-07-24 19:06                     ` Dan Williams
2006-07-25 14:27                   ` Paul Waldo
2006-07-24 23:24                 ` Neil Brown
2006-08-02 19:15                   ` Converting Ext3 to Ext3 under RAID 1 Dan Graham
2006-08-02 19:28                     ` dean gaudet
2006-08-02 19:31                     ` Paul Clements [this message]
2006-08-03  7:50                       ` Michael Tokarev
2006-08-02 22:38                     ` Robert Heinzmann
     [not found] ` <200607160913.32005.pwaldo@waldoware.com>
     [not found]   ` <Pine.LNX.4.62.0607161524170.7520@uplift.swm.pp.se>
2006-07-16 14:39     ` Can't add disk to failed raid array Paul Waldo
2006-07-17 18:36 ` Paul Waldo

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