On Thu, 15 Jul 2004, Niall O Broin wrote:
> Extensible filesystems and RAID are different things. With any
> implementation of RAID I have used, you do NOT get what you
> describe here - if you add another disk, the RAID software (host
> CPU or dedicated controller) has to rebuild the RAID layout
> (striping etc.) across the complete set of drives, which is a
> destructive process. If that were somehow possible you still need
> to have some means of telling the higher layers that there is more
> space e.g. LVM or its successor, EVMS AND you then need a
> filesystem which can be grown.
Hmmm.. both RAID implementations I've experience of (DEC^WMylex
DAC960 and Compaq Smart-2) can add disks to RAID5 arrays
non-destructively. The extra space is presented as a new logical
disk.
regards,
--
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