Tejun Heo writes:
> Mike Accetta wrote:
> > The distinguishing factor appears to be the queue depth (4 works, 5
> > and various values up to and including 31 fail) not the kernel version.
> > I am going to try running with the queue depth clamped at 4 to see if
> > this consistently masks the problem. I may also try some more experiments
> > if I have the time, like instrumenting what command was issued right
> > before the group that all time out or increasing the SCSI timeout,
> > in order to get some more insight into what is going on at the time of
> > the failure.
>
> Please report the result of 'hdparm -I /dev/sdX' where sdX is the
> problematic disk. Quite a few drives have problem with NCQ and we have
> to blacklist them.
This was reported last week in a earlier post to this thread. Here it
is again:
The version of hdparm on this box gives
dev/sdb:
operation not supported on SCSI disks
against the SCSI disk name. With the controller in compatible mode,
here is the 'hdparm -I /dev/hdb' output on the same disk:
ATA device, with non-removable media
Model Number: FUJITSU MHT2060BH
Serial Number: NR0YT53258G8
Firmware Revision: 0000104A
Standards:
Supported: 7 6 5 4
Likely used: 7
Configuration:
Logical max current
cylinders 16383 65535
heads 16 1
sectors/track 63 63
--
CHS current addressable sectors: 4128705
LBA user addressable sectors: 117210240
LBA48 user addressable sectors: 117210240
device size with M = 1024*1024: 57231 MBytes
device size with M = 1000*1000: 60011 MBytes (60 GB)
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 128 (0x80)
Recommended acoustic management value: 254, current value: 254
DMA: mdma0 mdma1 *mdma2 udma0 udma1 udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
* Look-ahead
* Write cache
* Power Management feature set
Security Mode feature set
* SMART feature set
* FLUSH CACHE EXT command
* Mandatory FLUSH CACHE command
* Device Configuration Overlay feature set
* 48-bit Address feature set
* Automatic Acoustic Management feature set
SET MAX security extension
* Advanced Power Management feature set
* DOWNLOAD MICROCODE cmd
* General Purpose Logging feature set
* SMART self-test
* SMART error logging
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
60min for SECURITY ERASE UNIT.
Checksum: correct
--
Mike Accetta
ECI Telecom Ltd.
Data Networking Division (previously Laurel Networks)
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