Hi,

> > ok,
> > update, I found something that I would like to discuss here.
> > 
> > when doing the following setup:
> > 
> > md0: hda1 hdc1
> > md1: hda3 hdc3
> > md2: hda4 hdc4
> > 
> > the trustix kernel is rebuilding them in parallel, not sequentially.
> > is that because of the volume manager, or what?
> > intentional?
> 
> It's the default way of the raid manager.
> 
> 
> Can probably be configured to be handled differently, but I don't see
> why doing it sequentially is better as default for a Trustix System
> during installation.

EVMS is using Device Mapper(DM).

MD will resync RAID'S in parallel if it thinks they are on different
devices, and sequentially if it thinks they're on the same device.

In 2.6 kernel MD probably thinks that none of the DM devices are on the
same physical disks , that's probably why it resyncs all of them in
parallel.

In kernel 2.4, MD thinks that all DM devices are on the same physical
disk and it resyncs them sequentially.


Regards,
-- 
Susmitha Jasti
Software Engineer
Trustix OS DDT – C.O.M.O.D.O.
Invent ² Secure, Chennai 
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