* One drive which perform frequent head unloads under Linux
@ 2008-09-25 9:14 Vincenzo Ciancia
2008-09-29 8:44 ` Tejun Heo
0 siblings, 1 reply; 4+ messages in thread
From: Vincenzo Ciancia @ 2008-09-25 9:14 UTC (permalink / raw)
To: linux-ide
[-- Attachment #1: Type: text/plain, Size: 523 bytes --]
Hi, I own a toshiba m400 and I already had to replace a disk in less
than one year (luckily, it was covered by warranty). I noticed that
Load_Cycle_Count was indeed increasing. Using hdparm -B 255 fixes it,
but also 254 seems to fix it (and I guess it is better to have some
power management than none at all?).
I am not subscribed to the list so if you need more information just ask
me. I followed instructions at
http://ata.wiki.kernel.org/index.php/Known_issues#How_to_determine_whether_a_machine_has_this_problem
[-- Attachment #2: dmidecode --]
[-- Type: text/plain, Size: 12094 bytes --]
# dmidecode 2.9
SMBIOS 2.4 present.
44 structures occupying 1406 bytes.
Table at 0x000EC000.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: TOSHIBA
Version: Version 3.80
Release Date: 05/22/2008
Address: 0xE0000
Runtime Size: 128 kB
ROM Size: 1024 kB
Characteristics:
ISA is supported
PCI is supported
PC Card (PCMCIA) is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
VLB is supported
Boot from CD is supported
Selectable boot is supported
EDD is supported
Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
3.5"/720 KB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Function key-initiated network boot is supported
Targeted content distribution is supported
BIOS Revision: 3.80
Firmware Revision: 2.30
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: TOSHIBA
Product Name: PORTEGE M400
Version: PPM40E-00700UIT
Serial Number: 66863013G
UUID: FB294580-5E55-11DD-8000-B00A66863013
Wake-up Type: Other
SKU Number: 0000000000
Family: 0000000000
Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
Manufacturer: TOSHIBA
Product Name: Portable PC
Version: Version A0
Serial Number: $$C063N3Y0
Handle 0x0003, DMI type 3, 17 bytes
Chassis Information
Manufacturer: TOSHIBA
Type: Notebook
Lock: Not Present
Version: Version 1.0
Serial Number: 00000000
Asset Tag: 0000000000
Boot-up State: Safe
Power Supply State: Safe
Thermal State: Safe
Security Status: None
OEM Information: 0x00000000
Handle 0x0004, DMI type 4, 32 bytes
Processor Information
Socket Designation: uFC-PGA Socket
Type: Central Processor
Family: <OUT OF SPEC>
Manufacturer: Intel Corporation
ID: E8 06 00 00 00 00 00 00
Version:
Voltage: 1.3 V
External Clock: 166 MHz
Max Speed: 1660 MHz
Current Speed: 1660 MHz
Status: Populated, Enabled
Upgrade: Other
L1 Cache Handle: 0x0012
L2 Cache Handle: 0x0013
L3 Cache Handle: Not Provided
Handle 0x0009, DMI type 5, 20 bytes
Memory Controller Information
Error Detecting Method: None
Error Correcting Capabilities:
None
Supported Interleave: Other
Current Interleave: Other
Maximum Memory Module Size: 2048 MB
Maximum Total Memory Size: 4096 MB
Supported Speeds:
Other
Supported Memory Types:
Other
DIMM
SDRAM
Memory Module Voltage: Unknown
Associated Memory Slots: 2
0x000A
0x000B
Enabled Error Correcting Capabilities:
None
Handle 0x000A, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: SO-DIMM
Bank Connections: 0 1
Current Speed: 4 ns
Type: Other DIMM SDRAM
Installed Size: 512 MB (Single-bank Connection)
Enabled Size: 512 MB (Single-bank Connection)
Error Status: OK
Handle 0x000B, DMI type 6, 12 bytes
Memory Module Information
Socket Designation: SO-DIMM
Bank Connections: 2
Current Speed: 4 ns
Type: Other DIMM SDRAM
Installed Size: 512 MB (Single-bank Connection)
Enabled Size: 512 MB (Single-bank Connection)
Error Status: OK
Handle 0x0012, DMI type 7, 19 bytes
Cache Information
Socket Designation: CPU Internal
Configuration: Enabled, Not Socketed, Level 1
Operational Mode: Write Back
Location: Internal
Installed Size: 64 KB
Maximum Size: 64 KB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: 1 ns
Error Correction Type: Single-bit ECC
System Type: Unified
Associativity: 8-way Set-associative
Handle 0x0013, DMI type 7, 19 bytes
Cache Information
Socket Designation: CPU Internal
Configuration: Enabled, Not Socketed, Level 2
Operational Mode: Write Back
Location: Internal
Installed Size: 2048 KB
Maximum Size: 2048 KB
Supported SRAM Types:
Other
Installed SRAM Type: Other
Speed: 1 ns
Error Correction Type: Single-bit ECC
System Type: Unified
Associativity: 8-way Set-associative
Handle 0x0016, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: EXTERNAL MONITOR PORT
External Connector Type: DB-15 female
Port Type: Other
Handle 0x0017, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: BUILT-IN MODEM PORT
External Connector Type: RJ-11
Port Type: Modem Port
Handle 0x0018, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: BUILT-IN LAN PORT
External Connector Type: RJ-45
Port Type: Network Port
Handle 0x0019, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: USB PORT
External Connector Type: Access Bus (USB)
Port Type: USB
Handle 0x001A, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: USB PORT
External Connector Type: Access Bus (USB)
Port Type: USB
Handle 0x001B, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: USB PORT
External Connector Type: Access Bus (USB)
Port Type: USB
Handle 0x001C, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: HEADPHONE JACK
External Connector Type: Mini Jack (headphones)
Port Type: Other
Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: 1394 PORT
External Connector Type: IEEE 1394
Port Type: Firewire (IEEE P1394)
Handle 0x001E, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: MICROPHONE JACK
External Connector Type: Other
Port Type: Other
Handle 0x001F, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: DOCKING INTERFACE PORT
External Connector Type: Other
Port Type: Other
Handle 0x0020, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: WIRELESS LAN
External Connector Type: Other
Port Type: Other
Handle 0x0021, DMI type 8, 9 bytes
Port Connector Information
Internal Reference Designator:
Internal Connector Type: None
External Reference Designator: BLUETOOTH
External Connector Type: Other
Port Type: Other
Handle 0x0037, DMI type 9, 13 bytes
System Slot Information
Designation: PCMCIA0
Type: 32-bit PC Card (PCMCIA)
Current Usage: In Use
Length: Other
ID: Adapter 1, Socket 0
Characteristics:
5.0 V is provided
3.3 V is provided
PC Card-16 is supported
Cardbus is supported
Hot-plug devices are supported
Handle 0x0038, DMI type 9, 13 bytes
System Slot Information
Designation: SD CARD
Type: Other
Current Usage: In Use
Length: Other
Characteristics:
3.3 V is provided
Opening is shared
Hot-plug devices are supported
Handle 0x0039, DMI type 9, 13 bytes
System Slot Information
Designation: MEMORY STICK
Type: Other
Current Usage: In Use
Length: Other
Characteristics:
3.3 V is provided
Opening is shared
Hot-plug devices are supported
Handle 0x003A, DMI type 9, 13 bytes
System Slot Information
Designation: XD PICTURE CARD
Type: 8-bit Other
Current Usage: In Use
Length: Other
Characteristics:
3.3 V is provided
Opening is shared
Hot-plug devices are supported
Handle 0x0058, DMI type 10, 20 bytes
On Board Device 1 Information
Type: Other
Status: Enabled
Description: MODEM
On Board Device 2 Information
Type: Other
Status: Enabled
Description: USB
On Board Device 3 Information
Type: Video
Status: Enabled
Description: VIDEO
On Board Device 4 Information
Type: Ethernet
Status: Enabled
Description: ETHERNET
On Board Device 5 Information
Type: Sound
Status: Enabled
Description: SOUND
On Board Device 6 Information
Type: Other
Status: Enabled
Description: WIRELESS LAN
On Board Device 7 Information
Type: Other
Status: Enabled
Description: BLUETOOTH
On Board Device 8 Information
Type: Other
Status: Enabled
Description: 1394
Handle 0x0059, DMI type 11, 5 bytes
OEM Strings
String 1: 000000,000000
Handle 0x0069, DMI type 12, 5 bytes
System Configuration Options
Option 1: TOSHIBA
Handle 0x0080, DMI type 15, 23 bytes
System Event Log
Area Length: 124 bytes
Header Start Offset: 0x0000
Data Start Offset: 0x0000
Access Method: General-purpose non-volatile data functions
Access Address: 0x0003
Status: Valid, Not Full
Change Token: 0x00000000
Header Format: No Header
Supported Log Type Descriptors: 0
Handle 0x0081, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 4 GB
Error Information Handle: Not Provided
Number Of Devices: 2
Handle 0x0082, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0081
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: SODIMM
Set: Unknown
Locator: DIMM 0
Bank Locator: CSA 0 & 1
Type: DDR2
Type Detail: Synchronous
Speed: Unknown
Manufacturer: CE00
Serial Number: F72D5F0D
Asset Tag: Not Specified
Part Number: M4 70T6554CZ3-CD5
Handle 0x0083, DMI type 17, 27 bytes
Memory Device
Array Handle: 0x0081
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 512 MB
Form Factor: SODIMM
Set: Unknown
Locator: DIMM 1
Bank Locator: CSA 2 & 3
Type: DDR2
Type Detail: Synchronous
Speed: Unknown
Manufacturer: 7F98
Serial Number: B51FC940
Asset Tag: Not Specified
Part Number:
Handle 0x0090, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000000A03FF
Range Size: 641 kB
Physical Array Handle: 0x0081
Partition Width: 0
Handle 0x0091, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000100000
Ending Address: 0x0003F8003FF
Range Size: 1039361 kB
Physical Array Handle: 0x0081
Partition Width: 0
Handle 0x00A0, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000000A03FF
Range Size: 641 kB
Physical Device Handle: 0x0082
Memory Array Mapped Address Handle: 0x0090
Partition Row Position: 1
Handle 0x00A1, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000200003FF
Range Size: 524289 kB
Physical Device Handle: 0x0082
Memory Array Mapped Address Handle: 0x0091
Partition Row Position: 1
Handle 0x00A2, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00020000000
Ending Address: 0x000400003FF
Range Size: 524289 kB
Physical Device Handle: 0x0083
Memory Array Mapped Address Handle: 0x0091
Partition Row Position: 1
Handle 0x00B0, DMI type 21, 7 bytes
Built-in Pointing Device
Type: Touch Pad
Interface: PS/2
Buttons: 2
Handle 0x00B1, DMI type 22, 26 bytes
Portable Battery
Location: 1st Battery
Manufacturer: TOSHIBA
Manufacture Date: 05/10/06
Serial Number: 2100050940
Name: LP665E
Chemistry: Lithium Ion
Design Capacity: 0 mWh
Design Voltage: 10800 mV
SBDS Version: Not Specified
Maximum Error: Unknown
OEM-specific Information: 0x00000000
Handle 0x00B7, DMI type 24, 5 bytes
Hardware Security
Power-On Password Status: Disabled
Keyboard Password Status: Disabled
Administrator Password Status: Disabled
Front Panel Reset Status: Disabled
Handle 0x00D0, DMI type 32, 11 bytes
System Boot Information
Status: No errors detected
Handle 0x00E0, DMI type 136, 6 bytes
OEM-specific Type
Header and Data:
88 06 E0 00 5A 5A
Handle 0xFEFF, DMI type 127, 4 bytes
End Of Table
[-- Attachment #3: hdparm-I_sda --]
[-- Type: text/plain, Size: 2419 bytes --]
/dev/sda:
ATA device, with non-removable media
Model Number: HTS541080G9SA00
Serial Number: MPBDL0XKGB63RG
Firmware Revision: MB4OC60R
Standards:
Used: ATA/ATAPI-7 T13 1532D revision 1
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 156301488
LBA48 user addressable sectors: 156301488
device size with M = 1024*1024: 76319 MBytes
device size with M = 1000*1000: 80026 MBytes (80 GB)
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Vendor, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 0
Advanced power management level: 254
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:
* 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
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
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
* IDLE_IMMEDIATE with UNLOAD
* SATA-I signaling speed (1.5Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
Non-Zero buffer offsets in DMA Setup FIS
DMA Setup Auto-Activate optimization
Device-initiated interface power management
In-order data delivery
* Software settings preservation
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
52min for SECURITY ERASE UNIT.
Checksum: correct
[-- Attachment #4: smartctl-a_sda --]
[-- Type: text/plain, Size: 4362 bytes --]
smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Model Family: Hitachi Travelstar 5K100 series
Device Model: HTS541080G9SA00
Serial Number: MPBDL0XKGB63RG
Firmware Version: MB4OC60R
User Capacity: 80,026,361,856 bytes
Device is: In smartctl database [for details use: -P show]
ATA Version is: 7
ATA Standard is: ATA/ATAPI-7 T13 1532D revision 1
Local Time is: Thu Sep 25 11:11:52 2008 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 645) seconds.
Offline data collection
capabilities: (0x5b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 55) minutes.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 062 Pre-fail Always - 0
2 Throughput_Performance 0x0005 100 100 040 Pre-fail Offline - 0
3 Spin_Up_Time 0x0007 253 253 033 Pre-fail Always - 1
4 Start_Stop_Count 0x0012 096 096 000 Old_age Always - 6779
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 100 100 040 Pre-fail Offline - 0
9 Power_On_Hours 0x0012 092 092 000 Old_age Always - 3611
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 098 098 000 Old_age Always - 3635
191 G-Sense_Error_Rate 0x000a 100 100 000 Old_age Always - 0
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 30408819
193 Load_Cycle_Count 0x0012 093 093 000 Old_age Always - 72343
194 Temperature_Celsius 0x0002 137 137 000 Old_age Always - 40 (Lifetime Min/Max 14/57)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 253 000 Old_age Always - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
Warning! SMART Selective Self-Test Log Structure error: invalid SMART checksum.
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: One drive which perform frequent head unloads under Linux
2008-09-25 9:14 One drive which perform frequent head unloads under Linux Vincenzo Ciancia
@ 2008-09-29 8:44 ` Tejun Heo
2008-09-29 12:18 ` Vincenzo Ciancia
0 siblings, 1 reply; 4+ messages in thread
From: Tejun Heo @ 2008-09-29 8:44 UTC (permalink / raw)
To: Vincenzo Ciancia; +Cc: linux-ide
Vincenzo Ciancia wrote:
> Hi, I own a toshiba m400 and I already had to replace a disk in less
> than one year (luckily, it was covered by warranty). I noticed that
> Load_Cycle_Count was indeed increasing. Using hdparm -B 255 fixes it,
> but also 254 seems to fix it (and I guess it is better to have some
> power management than none at all?).
>
> I am not subscribed to the list so if you need more information just ask
> me. I followed instructions at
>
> http://ata.wiki.kernel.org/index.php/Known_issues#How_to_determine_whether_a_machine_has_this_problem
I just updated the page. Can you please read the updated part (which is
in bold) and post how much the load cycle count increases per hour
without any adjustment?
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: One drive which perform frequent head unloads under Linux
2008-09-29 8:44 ` Tejun Heo
@ 2008-09-29 12:18 ` Vincenzo Ciancia
2008-09-30 14:17 ` Tejun Heo
0 siblings, 1 reply; 4+ messages in thread
From: Vincenzo Ciancia @ 2008-09-29 12:18 UTC (permalink / raw)
To: Tejun Heo; +Cc: linux-ide
On lun, 2008-09-29 at 17:44 +0900, Tejun Heo wrote:
> Vincenzo Ciancia wrote:
> > Hi, I own a toshiba m400 and I already had to replace a disk in less
> > than one year (luckily, it was covered by warranty). I noticed that
> > Load_Cycle_Count was indeed increasing. Using hdparm -B 255 fixes it,
> > but also 254 seems to fix it (and I guess it is better to have some
> > power management than none at all?).
> >
> > I am not subscribed to the list so if you need more information just ask
> > me. I followed instructions at
> >
> > http://ata.wiki.kernel.org/index.php/Known_issues#How_to_determine_whether_a_machine_has_this_problem
>
> I just updated the page. Can you please read the updated part (which is
> in bold) and post how much the load cycle count increases per hour
> without any adjustment?
The problem is that now I don't know what is the default (I also found
no way to read the -B setting with hdparm). I tried with hdparm -B 128
which seems adviced by many for laptops, and I get 130 cycles per hour.
Vincenzo Ciancia
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: One drive which perform frequent head unloads under Linux
2008-09-29 12:18 ` Vincenzo Ciancia
@ 2008-09-30 14:17 ` Tejun Heo
0 siblings, 0 replies; 4+ messages in thread
From: Tejun Heo @ 2008-09-30 14:17 UTC (permalink / raw)
To: Vincenzo Ciancia; +Cc: linux-ide
Vincenzo Ciancia wrote:
> On lun, 2008-09-29 at 17:44 +0900, Tejun Heo wrote:
>> Vincenzo Ciancia wrote:
>>> Hi, I own a toshiba m400 and I already had to replace a disk in less
>>> than one year (luckily, it was covered by warranty). I noticed that
>>> Load_Cycle_Count was indeed increasing. Using hdparm -B 255 fixes it,
>>> but also 254 seems to fix it (and I guess it is better to have some
>>> power management than none at all?).
>>>
>>> I am not subscribed to the list so if you need more information just ask
>>> me. I followed instructions at
>>>
>>> http://ata.wiki.kernel.org/index.php/Known_issues#How_to_determine_whether_a_machine_has_this_problem
>> I just updated the page. Can you please read the updated part (which is
>> in bold) and post how much the load cycle count increases per hour
>> without any adjustment?
>
> The problem is that now I don't know what is the default (I also found
> no way to read the -B setting with hdparm). I tried with hdparm -B 128
> which seems adviced by many for laptops, and I get 130 cycles per hour.
APM setting is not persistent and BIOS probably programs it during boot,
so just removing any script you added and doing a cold reboot should
give you the default configuration.
--
tejun
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2008-09-30 14:18 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2008-09-25 9:14 One drive which perform frequent head unloads under Linux Vincenzo Ciancia
2008-09-29 8:44 ` Tejun Heo
2008-09-29 12:18 ` Vincenzo Ciancia
2008-09-30 14:17 ` Tejun Heo
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