[ltp] tuning with hdparm

[Szakacsits Szabolcs]

On Fri, 3 Sep 2004, [iso-8859-1] Rémi Lambert wrote:

> I updated the SuSE kernel to 2.6.5-7.108 with YOU and I didn't hear it for 
> some hours... Strange, isn't it ? :-)

Depends on the settings. What does hdparm -I /dev/hda say? Mine is
included below. The Tac's went away by setting advanced power management
level to 254 (-B options). BTW, the disk make the same Tac's with other
OS's by default too.

	Szaka

ATA device, with non-removable media
	Model Number:       IC25N040ATCS05-0                        
	Serial Number:      CLP429F4JEKT4A
	Firmware Revision:  CS4OA61A
Standards:
	Used: ATA/ATAPI-5 T13 1321D revision 3 
	Supported: 5 4 3 2 & some of 6
Configuration:
	Logical		max	current
	cylinders	16383	16383
	heads		16	16
	sectors/track	63	63
	--
	CHS current addressable sectors:   16514064
	LBA    user addressable sectors:   73106418
	device size with M = 1024*1024:       35696 MBytes
	device size with M = 1000*1000:       37430 MBytes (37 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 = 16
	Advanced power management level: 254 (0xfe)
	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
	   *	Device Configuration Overlay feature set 
		SET MAX security extension
		Address Offset Reserved Area Boot
		Power-Up In Standby feature set
	   *	Advanced Power Management feature set
	   *	SMART self-test 
	   *	SMART error logging 
Security: 
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
	not	supported: enhanced erase
	36min for SECURITY ERASE UNIT. 
HW reset results:
	CBLID- above Vih
	Device num = 0 determined by the jumper
Checksum: correct