В последнее время стали появляться странные паузы при работе с диском: лампочка горит, top показывает близкий к 100% wa, но iotop говорит, что записи и чтения нет. Через полминуты отвисает и дальше работает нормально. Повторяться может с совершенно разной частотой, от раза в <5 минут до раза в час. Происходит при попытке какого-нибудь чтения: Chrome в кэш полез или в окно IDEA переключились.
Перезагружался в восьмерочку, там тоже воспроизводится.
В SMART при этом ничего подозрительного не видно
# smartctl -a /dev/sda
smartctl 5.42 2011-10-20 r3458 [x86_64-linux-3.10.0-pf] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Model Family: Hitachi Travelstar 5K500.B
Device Model: Hitachi HTS545050B9A300
...
Firmware Version: PB4OC66G
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Size: 512 bytes logical/physical
Device is: In smartctl database [for details use: -P show]
ATA Version is: 8
ATA Standard is: ATA-8-ACS revision 6
Local Time is: Wed Jan 1 20:48:13 2014 MSK
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: ( 158) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Error Recovery Control 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 0x000b 095 095 062 Pre-fail Always - 917504
2 Throughput_Performance 0x0005 100 100 040 Pre-fail Offline - 0
3 Spin_Up_Time 0x0007 155 155 033 Pre-fail Always - 1
4 Start_Stop_Count 0x0012 099 099 000 Old_age Always - 2808
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 056 056 000 Old_age Always - 19478
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 820
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 - 30
193 Load_Cycle_Count 0x0012 097 097 000 Old_age Always - 33891
194 Temperature_Celsius 0x0002 141 141 000 Old_age Always - 39 (Min/Max 13/50)
196 Reallocated_Event_Count 0x0032 094 094 000 Old_age Always - 701
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 200 200 000 Old_age Always - 0
223 Load_Retry_Count 0x000a 100 100 000 Old_age Always - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed without error 00% 19454 -
# 2 Extended offline Interrupted (host reset) 90% 19451 -
# 3 Short offline Completed without error 00% 19450 -
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.Собственно, почему такое может быть (или что я упустил в smartctl)? Пора бежать за новым?
