[ltp] "hdparm -y /dev/hdc" doesn't work?

[Felix Tudoran]

The device will* usually spin down when issuing the -y switch.
However, it won't notify you in the event of a success but will wake up as
soon as you enter a command. (such as hdparm -C)

If you want to double-check, carefully listen to your HDD as it spins down.


Felix E. Klee wrote:
> 
> Does anyone know why "hdparm -y /dev/hdc" doesn't work with the Ultrabay
> HDD in my T41?
> 
> # hdparm -y /dev/hdc
> 
>   /dev/hdc:
>    issuing standby command
> # hdparm -C /dev/hdc
> 
>   /dev/hdc:
>    drive state is:  active/idle
> 
> Of course, when I issue "hdparm -y /dev/hdc", I do *not* have mounted
> any partition on "/dev/hdc".  Otherwise it would be no surprise that it
> doesn't work.
> 
> What works fine is:
> 
> * "hdparm -Y /dev/hdc", but then I have to reboot the machine to spin it
>   up again.
> 
> * "hdparm -S 1 /dev/hdc".  Actually, specifying "-S" with a decent
>   timeout is a nice solution.  Still, I'd like to know why the "-y"
>   option fails.
> 
> Details:
> 
> # hdparm -I /dev/hdc
> 
>   /dev/hdc:
>   
>   ATA device, with non-removable media
>   	Model Number:       HTS548040M9AT00                         
>   	Serial Number:      MRL202L2JL8WPB
>   	Firmware Revision:  MG2OA5HA
>   Standards:
>   	Used: ATA/ATAPI-6 T13 1410D revision 3a 
>   	Supported: 6 5 4 3 
>   Configuration:
>   	Logical		max	current
>   	cylinders	16383	16383
>   	heads		16	16
>   	sectors/track	63	63
>   	--
>   	CHS current addressable sectors:   16514064
>   	LBA    user addressable sectors:   78140160
>   	device size with M = 1024*1024:       38154 MBytes
>   	device size with M = 1000*1000:       40007 MBytes (40 GB)
>   Capabilities:
>   	LBA, IORDY(can be disabled)
>   	bytes avail on r/w long: 4	Queue depth: 1
>   	Standby timer values: spec'd by Vendor, no device specific minimum
>   	R/W multiple sector transfer: Max = 16	Current = 0
>   	Advanced power management level: 128 (0x80)
>   	Recommended acoustic management value: 128, 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:
>   	   *	NOP cmd
>   	   *	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
>   	   *	Mandatory FLUSH CACHE command 
>   	   *	Device Configuration Overlay feature set 
>   		Automatic Acoustic Management feature set 
>   		SET MAX security extension
>   		Address Offset Reserved Area Boot
>   	   *	SET FEATURES subcommand required to spinup after power up
>   		Power-Up In Standby feature set
>   	   *	Advanced Power Management feature set
>   	   *	SMART self-test 
>   	   *	SMART error logging 
>   Security: 
>   	Master password revision code = 65534
>   		supported
>   		enabled
>   	not	locked
>   		frozen
>   	not	expired: security count
>   	not	supported: enhanced erase
>   	Security level maximum
>   	26min for SECURITY ERASE UNIT. 
>   HW reset results:
>   	CBLID- above Vih
>   	Device num = 0 determined by the jumper
>   Checksum: correct
> # uname -a
>   Linux t41 2.6.14.4 #3 Sat Mar 25 11:14:41 CET 2006 i686 unknown unknown
> GNU/Linux
> # lsmod|grep -i lt_hotswap
>   [not found]
> 
> -- 
> Felix E. Klee
> Jabber/Google Talk: feklee@jabber.org, SIP: 9779619@sipgate.de
> ICQ: 158124695, Yahoo!: feklee, AIM: felix.klee@inka.de
> Gizmo: felixklee, Skype: felix.klee--}-<<mixed>>
> -- 
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> 
> 

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