On 05/01/2010 03:49 AM, Peter van Hooft wrote:
>> How can I control the automatic power management feature of my SATA disk
>> drives? Right now the heads are unloading so frequently that within
>> one year I will have exceeded the rated number of load/unload cycles for
>> the drives. The drives are Western Digital model WD10EADS. I tried
>> using "hdparm -B 254" and "hdparm -B 0", but neither works:
>>
>> # hdparm -B 254 /dev/sda
>>
>> /dev/sda:
>> setting Advanced Power Management level to 0xfe (254)
>> HDIO_DRIVE_CMD failed: Input/output error
>> HDIO_DRIVE_CMD(identify) failed: Input/output error
>> # hdparm -B 0 /dev/sda
>>
>> /dev/sda:
>> setting Advanced Power Management level to 0xfe (254)
>> HDIO_DRIVE_CMD failed: Input/output error
>> HDIO_DRIVE_CMD(identify) failed: Input/output error
>>
>> My efforts to find anything useful with 'sdparm' have been fruitless.
>>
>
> Hi,
>
> I use both:
> hdparm -q -S 0 /dev/sda
> hdparm -q -B 255 /dev/sda
> which seems to work.
On what make and model of drive? I know that works on my other drives,
but the WD10EADS doesn't support whatever ATA command "hdparm -B" uses.
Here:
# hdparm -B 255 /dev/sda
/dev/sda:
setting Advanced Power Management level to disabled
HDIO_DRIVE_CMD failed: Input/output error
HDIO_DRIVE_CMD(identify) failed: Input/output error
# hdparm -B /dev/sda
/dev/sda:
APM_level = not supported
The drive does claim to support "Power Management feature set". See
below:
# hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: WDC WD10EADS-65M2B0
Serial Number: WD-WCAV53157295
Firmware Revision: 01.00A01
Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5,
SATA Rev 2.6
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 1953525168
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 953869 MBytes
device size with M = 1000*1000: 1000204 MBytes (1000 GB)
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
* Power Management feature set
* Write cache
* Look-ahead
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* 64-bit World wide name
* WRITE_UNCORRECTABLE_EXT command
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Phy event counters
* NCQ priority information
* DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
unknown 206[13] (vendor specific)
Logical Unit WWN Device Identifier: 50014ee203885dba
NAA : 5
IEEE OUI : 0014ee
Unique ID : 203885dba
Checksum: correct
--
Bob Nichols "NOSPAM" is really part of my email address.
Do NOT delete it.
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