Re: raidframe rebuild question

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Mon, Oct 03, 2011 at 10:52:25PM +0100, Hugo Silva wrote:
> Some time ago there was a project to reduce rebuild times in raidframe.

RAIDframe parity maps.

> Has it been incorporated in the system?

Yes, it has.

> If yes, which version (current? 5.1?), ...

Both.

> ... and is there anything special that needs to be done to activate it?

It is on by default on new RAID volumes. On existing RAID volumes you
have to use "raidctl -M yes raid<n>" and reboot the machine afterwards.

You can also use "raidctl -m raid<n>" to check whether parity maps
are enabled:

# raidctl -m raid1
raid1: parity map enabled with 4096 regions of 70MB
raid1: regions marked clean after 8 intervals of 40.000s
raid1: write/sync/clean counters 12061564/33654/1586
raid1: 24 dirty regions
raid1: parity map will remain enabled on next configure

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/