Hi Tim,
Tim Small wrote, on 03/04/10 17:01:
> What happens if you disable NCQ? Seen similar crap on another system
> with WD drives, and I suspect a firmware bug.
>
> That system was OK with a queue depth of 2 or less. You can confirm
> this with hdparm -t, I think.
>
> This problem should really be assigned to the kernel I suppose, as all
> that mdadm does is to tell the kernel to execute the check....
I attached the hdparm information. If I see the problem again I will
try to disable the NCQ of the drives if activated.
Thanks in advance,
Best regards,
Jelle
# hdparm -t /dev/sda /dev/sdb /dev/sdc
/dev/sda:
Timing buffered disk reads: 308 MB in 3.05 seconds = 101.09 MB/sec
/dev/sdb:
Timing buffered disk reads: 310 MB in 3.01 seconds = 103.11 MB/sec
/dev/sdc:
Timing buffered disk reads: 312 MB in 3.02 seconds = 103.29 MB/sec
# hdparm -i /dev/sda /dev/sdb /dev/sdc
/dev/sda:
Model=WDC WD3202ABYS-02B7A0 , FwRev=02.03B03, SerialNo=
WD-WCAT1E314175
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7
* signifies the current active mode
/dev/sdb:
Model=WDC WD3202ABYS-02B7A0 , FwRev=02.03B03, SerialNo=
WD-WCAT1E298345
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7
* signifies the current active mode
/dev/sdc:
Model=WDC WD3202ABYS-02B7A0 , FwRev=02.03B03, SerialNo=
WD-WCAT1E296502
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=625142448
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7
* signifies the current active mode
