Re: Software vs Hardware RAID 10?
On Mon, Aug 27, 2007 at 12:56:06AM +0000, Douglas A. Tutty wrote:
> What about SATA ports on the main board? dmesg shows that ata1 and ata2
> are on one interrupt, ata3 and ata4 on another, etc
>
> Since SATA is still ATA, if you have two drives in software raid1,
> should they be on ata1 and ata3 or is ata1 and ata2 OK (unlike PATA)?
>
> This is an Asus M2N-SLI Deluxe AM/2 MB, Athlon64 running Etch amd64.
No with SATA each port is independant. With PATA two drives shared one
cable, which meant if one drive failed it almost always prevented access
to the other. SATA has no such problem so you can use all the
connectors.
Now of course if your controller fails, well then you loose access to
all the drives connected to it, but fortunately controller failures seem
much rarer than drive or cable failures.
About the only part of SATA that is like PATA is that you connect drives
to it, and it uses basicly the same protocol. Not really much else in
commen.
--
Len Sorensen
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