> So which hard drives are connected to which controllers?
> And what device drivers are those controllers using?
0. c7t0d0 <DEFAULT cyl 7764 alt 2 hd 255 sec 63>
/p...@0,0/pci8086,3...@3/pci1000,3...@0/s...@0,0
1. c7t1d0 <ATA-Hitachi HDS72202-A20N-1.82TB>
/p...@0,0/pci8086,3...@3/pci1000,3...@0/s...@1,0
2. c8t0d0 <ATA-Hitachi HDS72202-A20N-1.82TB>
/p...@0,0/pci8086,3...@7/pci1000,3...@0/s...@0,0
3. c8t1d0 <ATA-Hitachi HDS72202-A20N-1.82TB>
/p...@0,0/pci8086,3...@7/pci1000,3...@0/s...@1,0
4. c9t0d0 <ATA-Hitachi HDS72202-A20N-1.82TB>
/p...@0,0/pci8086,3...@9/pci1000,3...@0/s...@0,0
5. c9t1d0 <ATA-Hitachi HDS72202-A20N-1.82TB>
/p...@0,0/pci8086,3...@9/pci1000,3...@0/s...@1,0
6. c10d0 <DEFAULT cyl 7764 alt 2 hd 255 sec 63>
/p...@0,0/pci-...@1f,2/i...@0/c...@0,0
7. c10d1 <Hitachi- JK1131YAGP8N3-0001-1.82TB>
/p...@0,0/pci-...@1f,2/i...@0/c...@1,0
8. c11d0 <Hitachi- JK1131YAGZE4Z-0001-1.82TB>
/p...@0,0/pci-...@1f,2/i...@1/c...@0,0
9. c11d1 <Hitachi- JK1131YAGGMT9-0001-1.82TB>
/p...@0,0/pci-...@1f,2/i...@1/c...@1,0
> Strange that you say
> that there are two hard drives
> per controllers, but three drives are showing
> high %b.
>
> And strange that you have c7,c8,c9,c10,c11
> which looks like FIVE controllers!
c7, c8 and c9 are LSI controllers using the MPT driver. The motherboard has
6 SATA ports which are presented as two controllers (presumably c10 and c11)
one for ports 0-3 and one for ports 4 and 5; both currently use the PCI-IDE
drivers.
And as you say, it's odd that there are three drives on c10 and c11, since
they should have only two of the raidz2 drives; I need to go double-check my
cabling. The way it's *supposed* to be configured is:
c7: two RAIDZ2 drives and one of the boot mirror drives
c8: two RAIDZ2 drives
c9: two RAIDZ2 drives
c10: one RAIDZ2 drive and one of the boot mirror drives
c11: one RAIDZ2 drive
(The theory here is that since this server is going to spend its life being
shipped places in the back of a truck I want to make sure that no single
controller failure can either render it unbootable or destroy the RAIDZ2.)
That said, I think that this is probably *a* tuning problem but not *the*
tuning problem, since I was getting acceptable performance over CIFS and
miserable performance over FC. Richard Elling suggested I try the latest dev
release to see if I'm encountering a bug that forces synchronous writes, so
I'm off to straighten out my controller distribution, check to see if I have
write caching turned off on the motherboard ports, install the b132 build,
and possibly grab some dinner while I'm about it. I'll report back to the
list with any progress or lack thereof.
--
Dave Pooser, ACSA
Manager of Information Services
Alford Media http://www.alfordmedia.com
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