Re: 1x 3ware controllers vs. 2x 3ware controllers

[David Greaves <david@dgreaves.com>]

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Scott T. Smith wrote:
| On Sun, 2004-08-01 at 08:24, Mikael Abrahamsson wrote:
|
|>On Sun, 1 Aug 2004, Jim Buttafuoco wrote:
|>
|>
|>>I am switching all of my 3ware controllers over to Adaptec SATA raid
|>>controllers.  I am getting better performance with them.  Jim
|>
|>I am quite curious about the 16port SATA controller Adaptec has now. Do
|>you have any filesystem write figures for this controller under linux and
|>ext3?
|
|
| One main problem with the 16port controller, at least in JBOD mode, is
| that there is not enough PCI bandwidth to fill the disks if you do large
| writes.  Thus two separate 8port controllers, on separate PCI busses,
| should yield higher performance.
|
| OTOH, if you're doing small ops, or RAID1, it will probably be fine.
|
| (disclaimer -- I haven't tried the Adaptec boards yet, but they're on my
| list, along with Highpoint's)
|
| 	Scott

Highpoint have a multi port PCI-X card out (but no open drivers support it)
Are there any others multi-sata PCI-X cards?

I'm thinking about building a 2Tb SW RAID but will wait a few months
because I want PCI-X or similar to get the bandwidth to the gigabit card.

David
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