* Scott T. Smith (scott@xxxxxxxxxxxxxx) [20041015 11:55]:
> then filter out email based on duplicate message-ids! :-P
I would if the corporate Exchange would _let_ me have duplicates.
It does not. Moreover, I'm setting Mail-Followup-To: which _you_
are not honoring.
> When issueing random reads of 1 megabyte each, I get 2
> gigabits/sec from the Highpoint, and 1.5 gigabits/sec from the
> 3ware, when using a single controller and 8 disks (WD 250GB).
> No RAID, just JBOD mode, all disks in use at once.
Cannot comment on this one, haven't done measurements myself. We
don't use random I/O much.
> the 8506 won't even let me set the disk up as a JBOD. In order
> to zap it, I need yet another controller!
Do it with the 9xxx. Interesting though... did you let 3ware know
about it? (We do not have 8506s yet.)
> That's the funny thing about the 3ware 12 disk controllers; they
> don't even have the bandwidth to support all 12 disks!
Theoretically you could get 12*50 MiB/s out from the disks. PCI
limit is just 12% lower. Add processing overhead you are about to
go.
> It truly depends on what you want to use it for. If you want
> RAID5, you most likely want a hardware solution, so yeah, 3ware
> would be the way to go.
Agreed.
> If you want JBOD though, I'd go with Highpoint.
Thanks for the data point.
Peter
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