Hi Terry,
I have a bunch of R300's here. From one that is using the on-board SATA
and 2 drives in a gmirror setup (very similar to the OP) after 18 hours
of uptime:
[0:2] speedtest:~> vmstat -i
interrupt total rate
irq23: atapci0 254116 3
Interesting. Which version of FreeBSD is this system running? I guess
you didn't experience any of the timeouts I'm seeing?
I also have another R300 with Dell's "SAS 6/iR" card (a re-branded LSI
1068-something, seen as "mpt" by FreeBSD). While Dell only sells that as
part of a package deal with the hot-swap backplane and redundant power
supplies, there's no reason you couldn't pick one up on eBay and add it
yourself. You'll need some sort of breakout cable to get from the big
connector on the SAS 6 to individual SATA ports.
Yeah, this R300 was bought second-hand and unfortunately the owner
pulled the RAID card out. It's something to consider, getting one of
those cards. Do you use the RAID-features of the drive and if so, does
that work well? I'm a bit hesitant to use hardware raid; it would be a
big plus if the RAID disks could also be used stand-alone if need be
(which is easy with gmirror because of its metadata being stored in the
drive's last sector).
Thanks,
Pieter
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