Re: Converting Ext3 to Ext3 under RAID 1

[Robert Heinzmann <Robert.Heinzmann@gmx.net>]

Hi Dan,

see thread http://www.spinics.net/lists/raid/msg07742.html.

Regards,
Robert

Dan Graham schrieb:
> Hello;
>   I have an existing, active ext3 filesystem which I would like to 
> convert to
> a RAID 1 ext3 filesystem with minimal down time.  After casting about 
> the web and experimenting some on a test system, I believe that I can 
> accomplish this in the following manner.
>
>   - Dismount the filesystem.
>   - Shrink the filesystem to leave room for the RAID superblock at the 
> end
>     while leaving the partition size untouched (shrinking by 16 blocks 
> seems to
>     work )
>   - Create a degraded array with only the partition carrying the 
> shrunk ext3
>     system
>   - start the array and mount the array.
>   - hot add the mirroring partitions.
>
> The questions I have for those who know Linux-Raid better than I.
>
>    Is this scheme even half-way sane?
>    Is 16 blocks a large enough area?
>
>
> Thanks in advance for any and all feed-back.
>