Re: How can SATA power management feature be controlled?

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>> 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

Well, my disk claims to support 'Advanced Power Management:

/dev/sda:

ATA device, with non-removable media
	Model Number:       WDC WD3200BJKT-00F4T0
	Serial Number:      WD-WX30AC9E6538
	Firmware Revision:  11.01A11
	Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5
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:  625142448
	Logical/Physical Sector size:           512 bytes
	device size with M = 1024*1024:      305245 MBytes
	device size with M = 1000*1000:      320072 MBytes (320 GB)
	cache/buffer size  = 16384 KBytes
	Nominal Media Rotation Rate: 7200
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 = 8
	Advanced power management level: disabled
	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
	    	Security Mode feature set
	   *	Power Management feature set
	   *	Write cache
	   *	Look-ahead
	   *	Host Protected Area feature set
	   *	WRITE_BUFFER command
	   *	READ_BUFFER command
	   *	NOP cmd
	   *	DOWNLOAD_MICROCODE
	    	Advanced Power Management feature set
	    	SET_MAX security extension
	   *	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
	   *	WRITE_{DMA|MULTIPLE}_FUA_EXT
	   *	64-bit World wide name
	   *	IDLE_IMMEDIATE with UNLOAD
	   *	{READ,WRITE}_DMA_EXT_GPL commands
	   *	Segmented DOWNLOAD_MICROCODE
	   *	Free-fall Control feature set
	   *	Gen1 signaling speed (1.5Gb/s)
	   *	Gen2 signaling speed (3.0Gb/s)
	   *	Native Command Queueing (NCQ)
	   *	Host-initiated interface power management
	   *	Phy event counters
	   *	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)
Security:
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
		supported: enhanced erase
	80min for SECURITY ERASE UNIT. 80min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee2ae89294c
	NAA		: 5
	IEEE OUI	: 0014ee
	Unique ID	: 2ae89294c
Checksum: correctLoad_Cycle_Count


What is also interesting is that when I upgraded the BIOS of my Dell
Latitude D630 yesterday, the Load_Cycle_Count
started to grow again.  So, it looks like that the BIOS you are
running also affects how much you can
limit Load_Cycle_Count.

peter
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