On Thu Jun 11, 2009 at 01:36:59AM +0200, Michael Ole Olsen wrote:
> the slow disks (them with 85MB/s) in the posting are the one on the pci 4x sata controller
>
> the 32bit pci sata (sata_sil) controller has 3 disks connected
>
> the onboard sata2 6x sata connectors have 6 disks connected
> (p5n32-e sli motherboard), i believe all these are sata2 and not shared with
> an ide controller.
>
> so only the pci controller should have bus limitations, but i wonder why it is
> that slow on reshape compared to build.
>
The build was reading (sequentially) from all drives and writing
(sequentially) only to one, whereas a reshape is reading from and
writing to all the drives (including seeking between reads & writes).
This means it is inevitably a lot slower. In addition, you're now using
3 rather than 2 drives on the PCI bus, which will increase the
congestion.
Cheers,
Robin
--
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( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> |
/ / ) | Little Jim says .... |
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