Very low disk performance Highpoint 1820a

[Steven Hartland]

Only on write this is a read test.
----- Original Message ----- 
From: "Arne Wörner" <arne_woerner at yahoo.com>

> Furthermore RAID-5 needs to read the parity block, before it can
> update that block, so that there are 2 disc transactions more,
> which could explain the better performance of a single disk, too?
>
> Or does the striping effect (inherent to RAID-5) compensate those
> 2 extra transactions (at least in case of sequential writes)?



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