Re: Newbie storage questions... (RAID5, SANs, SCSI)

Jesper Monsted wrote:
> "Nik Simpson" <[EMAIL PROTECTED]> wrote in
> news:[EMAIL PROTECTED]:
>>> Ok... "stripe size"... So in a RAID array of 5 disks with a stripe
>>> size of 8k, if I submit a request to the RAID controller to write
>>> 5,000 bytes, these bytes will not be scattered equally across all
>>> drives? Since the size of the data being written is less than the
>>> stripe size, all of the data could conceivably written to one disk?
>>
>> You nailed it. Stripe size is the minimum size of a write to a
>> physical disk in the array. Trying allocate evenly at the byte level
>> to each disk would be insane in terms of the effect on performance.
>
> Unless you're using RAID3 where the stripe size is basically one bit
> ;)

IIRC, the original RAID definition for RAID3 is striping at the byte level,
not the bit level, perhaps you are thinking of RAID2.


-- 
Nik Simpson