The answer is still the same (May 1999).
<>< Lance.
Scott Smyth wrote:
>
> I would like to explore the requirements of expanding
> RAID 0,4, and 5 levels from an existing configuration.
> For example, if you have 3 disks in a RAID 5 configuration,
> you currently cannot add a disk to the RAID 5 without
> destructively remaking the RAID 5 configuration and reformatting
> the multiple block device upon completion. Is anyone
> working on (I remember it mentioned previously on the list)
> what has been called "resize array" in the software RAID
> howto in the wish list section.
>
> from RAID 5 FAQ:
>
> 2.Q: Can I add disks to a RAID-5 array?
>
> A: Currently, (September 1997) no, not without erasing all data.
> A conversion utility to allow this does not yet exist. The problem
> is that the actual structure and layout of a RAID-5 array depends
> on the number of disks in the array. Of course, one can add
> drives by backing up the array to tape, deleting all data, creating
> a new array, and restoring from tape.
>
> thanks,
> Scott
