* Scott T. Smith (scott@gelatinous.com) [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

-- 
    .+'''+.         .+'''+.         .+'''+.         .+'''+.         .+''
 Kelemen Péter     /       \       /       \     Peter.Kelemen@cern.ch
.+'         `+...+'         `+...+'         `+...+'         `+...+'
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html