Re: Disk sleep 的问题
我没有启动laptop-mode，根本就没有装。 按照这个方法
hdparm -B 254 /dev/sda
也没有用，不知道是什么问题。 smartctl 结果：
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: Fujitsu MHV series
Device Model: FUJITSU MHV2080BH
Serial Number: NW05T6827U26
Firmware Version: 00840028
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 4a
Local Time is: Wed Aug 5 16:10:22 2009 CST
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: ( 471) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
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.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
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 0x000f 100 100 046 Pre-fail Always - 236717
2 Throughput_Performance 0x0005 100 100 030 Pre-fail Offline - 24510464
3 Spin_Up_Time 0x0003 100 100 025 Pre-fail Always - 1
4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 2495
5 Reallocated_Sector_Ct 0x0033 100 100 024 Pre-fail Always - 8589934592000
7 Seek_Error_Rate 0x000f 100 100 047 Pre-fail Always - 2579
8 Seek_Time_Performance 0x0005 100 100 019 Pre-fail Offline - 0
9 Power_On_Seconds 0x0032 093 093 000 Old_age Always - 3736h+12m+30s
10 Spin_Retry_Count 0x0013 100 100 020 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 1213
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 191
193 Load_Cycle_Count 0x0032 098 098 000 Old_age Always - 49459
194 Temperature_Celsius 0x0022 100 100 000 Old_age Always - 42 (Lifetime Min/Max 11/50)
195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 74
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 451674112
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x000f 100 100 060 Pre-fail Always - 19695
203 Run_Out_Cancel 0x0002 100 100 000 Old_age Always - 433741562044
240 Head_Flying_Hours 0x003e 200 200 000 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]
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.
现在怀疑是
5 Reallocated_Sector_Ct 0x0033 100 100 024 Pre-fail Always - 8589934592000
出了问题，raw值太不正常了。不晓得这样分析对不对。
amateur 写道:
On Wed, Sep 23, 2009 at 10:13:22AM +0800, 张增波 wrote:
大家好！
我发现svn update进程经常挂在disk sleep状态，很久无法恢复运行，qemu-arm模
拟器有时也是因此等半天，不知道哪位有经验，说说为什么，怎么改善呢？
我用的是联想T60，Debian Testing 版本，文件系统ext3，空间占用约90%。
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也有可能是 disk 被 spin down 了，或者被置于了 standby 状态。
不知道你启用了 laptop-mode 没有，不要启用这个服务，另外在系统启动脚本
里加一句：
hdparm -B 254 /dev/sda
这句话禁止磁盘 automatic spin down
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