From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: Maurice Hilarius <maurice@harddata.com>
Cc: "Linux, Raid lista" <linux-raid@vger.kernel.org>
Subject: Re: deliberately degrading RAID1 to a single disk, then back again
Date: Tue, 26 Jun 2007 14:22:02 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0706261421430.3561@p34.internal.lan> (raw)
In-Reply-To: <4681546B.4030709@harddata.com>
mdadm /dev/md0 --fail /dev/sda1
On Tue, 26 Jun 2007, Maurice Hilarius wrote:
> Good day all.
>
> Scenario:
> Pair of identical disks.
> partitions:
> Disk 0:
> /boot - NON-RAIDed
> swap
> / - rest of disk
>
> Disk 01
> /boot1 - placeholder to take same space as /boot on disk0 - NON-RAIDed
> swap
> / - rest of disk
>
> I created RAID1 over / on both disks, made /dev/md0
>
>> From time to time I want to "degrade" back to only single disk, and turn
> off RAID as the overhead has some cost
>> From time to time I want to restore to RAID1 function, and re-synch the
> pair to current.
>
> Yes, this is a backup scenario..
>
> Are there any Recommendations ( with mdadm syntax) please?
>
>
>
>
>
> --
>
> --
>
> Regards,
> Maurice
> 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
>
> 1001 11111001 00010001 00000010 10011101 01110100 11100011 01011011 11011000 01000001 01010110 11000101 01100011 01010110 10001000 11000000
>
> 10 base 13,256,278,887,989,457,651,018,865,901,401,704,640
>
>
> -
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>
next prev parent reply other threads:[~2007-06-26 18:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-26 18:01 deliberately degrading RAID1 to a single disk, then back again Maurice Hilarius
2007-06-26 18:22 ` Justin Piszcz [this message]
2007-06-27 22:23 ` Mike Accetta
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