On Thursday April 12, rich@xxxxxxxxxxxxxx wrote:
> I forgot to ask something, sorry. With RAID0 and all the odd size drives
> I have I'd get a lot of left over unused space. Is there anyway to make
> use of this slack?
md/raid0 makes use of all available space (modulo chunk size).
To quote from "man md"
RAID0
A RAID0 array (which has zero redundancy) is also known as a striped
array. A RAID0 array is configured at creation with a Chunk Size which
must be a power of two, and at least 4 kibibytes.
The RAID0 driver assigns the first chunk of the array to the first
device, the second chunk to the second device, and so on until all
drives have been assigned one chunk. This collection of chunks forms a
stripe. Further chunks are gathered into stripes in the same way which
are assigned to the remaining space in the drives.
If devices in the array are not all the same size, then once the small‐
est device has been exhausted, the RAID0 driver starts collecting
chunks into smaller stripes that only span the drives which still have
remaining space.
(If you think that isn't suitable clear, you are probably correct.
Improvements always welcome).
NeilBrown
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