Jeremy Chadwick wrote:
On Fri, Jun 18, 2010 at 08:08:24AM +0100, Matthew Lear wrote:
[...]
The drives in the RAID exist on two seperate ATA channels:
[r...@meshuga /home/matt]# atacontrol list
ATA channel 0:
Master: ad0<WDC WD3200AAKS-00VYA0/12.01B02> SATA revision 2.x
Slave: ad1<FB160C4081/HPF0> SATA revision 1.x
ATA channel 1:
Master: ad2<WDC WD3200AAKS-00VYA0/12.01B02> SATA revision 2.x
Slave: no device present
ATA channel 2:
Master: acd0<HL-DT-ST DVDRAM GH22NS40/NL01> SATA revision 1.x
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
ad1 is a third 160G drive that I periodically back up to using cron.
So your RAID-1 array consists of ad0 and ad2? You didn't provide
"atacontrol status" output so I'm going to assume that's the case.
What's odd to me is that you somehow have two disks on a single ATA
channel -- look closely at channel 0. SATA has a 1:1 device-to-channel
mapping, so I'm a little surprised to see there's two devices on channel
0. To me, this indicates your system BIOS is configured to run in
"Emulation" mode -- where the ATA controller pretends to be a PATA/IDE
controller, thus SATA-0 and SATA-1 devices appear as primary master and
primary slave, respectively.
What motherboard is this? Can you change the setting to either
"Native", "Enhanced", or (even better) "AHCI"? I've seen some systems
where the Serial ATA option in the BIOS has an "Auto" option, which does
totally bizarre things at times.
But before changing the setting, I would recommend dealing with the disk
problem first. Changing the SATA controller operation mode will almost
certainly change all of your device names (you'll have to go into
single-user mode, mount filesystems by hand, fix /etc/fstab, etc.).
[...]
It is "normal" on HP G5 series. I have ProLiant ML 110 G5. I tried all
type of settings in BIOS, but all of them shows two disks on one ATA
channel:
HP ProLiant ML 110 G5
FreeBSD 7.2-RELEASE-p4 amd64 GENERIC
r...@kiwi ~/# atacontrol list
ATA channel 0:
Master: ad0 <SAMSUNG HD103UJ/1AA01113> SATA revision 2.x
Slave: ad1 <SAMSUNG HD103UJ/1AA01113> SATA revision 2.x
ATA channel 1:
Master: ad2 <SAMSUNG HD103UJ/1AA01113> SATA revision 2.x
Slave: ad3 <SAMSUNG HD103UJ/1AA01113> SATA revision 2.x
ATA channel 2:
Master: acd0 <HL-DT-ST DVD-RAM GH15L/FA01> SATA revision 1.x
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
atapci0: <Intel ICH9 SATA300 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1c10-0x1c1f,0x1c00-0x1c0f at
device 31.2 on pci0
ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci0
ata1: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
atapci1: <Intel ICH9 SATA300 controller> port
0x1c68-0x1c6f,0x1c5c-0x1c5f,0x1c60-0x1c67,0x1c58-0x1c5b,0x1c30-0x1c3f,0x1c20-0x1c2f
irq 18 at device 31.5 on pci0
atapci1: [ITHREAD]
ata2: <ATA channel 0> on atapci1
ata2: [ITHREAD]
ata3: <ATA channel 1> on atapci1
ata3: [ITHREAD]
pciconf -lv
atap...@pci0:0:31:2: class=0x01018a card=0x31f4103c chip=0x29208086
rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '82801IB/IR/IH (ICH9 Family) 4 port Serial ATA Storage
Controller 1'
class = mass storage
subclass = ATA
atap...@pci0:0:31:5: class=0x010185 card=0x31f4103c chip=0x29268086
rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '82801IB/IR/IH (ICH9 Family) 2 port Serial ATA Storage
Controller 2'
class = mass storage
subclass = ATA
ad0: 953869MB <SAMSUNG HD103UJ 1AA01113> at ata0-master SATA300
ad1: 953869MB <SAMSUNG HD103UJ 1AA01113> at ata0-slave SATA300
ad2: 953869MB <SAMSUNG HD103UJ 1AA01113> at ata1-master SATA300
ad3: 953869MB <SAMSUNG HD103UJ 1AA01113> at ata1-slave SATA300
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <USB 2.0 USB Flash Drive 0.00> Removable Direct Access SCSI-2 device
da0: 40.000MB/s transfers
da0: 1928MB (3948544 512 byte sectors: 255H 63S/T 245C)
acd0: DVDR <HL-DT-ST DVD-RAM GH15L/FA01> at ata2-master SATA150
I am using this machine as storage for backups with ZFS RAIDZ without
any timeouts so I think that two disks on one channel is not causing the
timeouts (only little slowdown)
Miroslav Lachman
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