Практический пример полезности zfs
Прислал мне NAS письмо со SMART отчётом. Посмотрел - вроде без сильного криминала. Запустил скраб на массиве.
[Текущий отчёт]
pool: Pool
state: ONLINE
scan: scrub in progress since Sat Feb 9 09:46:15 2013
4.01T scanned out of 9.01T at 308M/s, 4h43m to go
4K repaired, 44.48% done
config:
NAME STATE READ WRITE CKSUM
Pool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada3 ONLINE 0 0 0
ada2 ONLINE 0 0 0 (repairing)
ada1 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada5 ONLINE 0 0 0
Видно, что один сектор проблемный на ada2
Смотрим его смарт
[SMART ada2]
Device /dev/ada2 - SAMSUNG HD204UI 1AQ10001
=== START OF INFORMATION SECTION ===
Model Family: SAMSUNG SpinPoint F4 EG (AF)
Device Model: SAMSUNG HD204UI
Serial Number: S2H7JD1Z904896
LU WWN Device Id: 5 0024e9 00414e5b3
Firmware Version: 1AQ10001
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 6
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Sat Feb 9 13:36:29 2013 MSK
==> WARNING: Using smartmontools or hdparm with this
drive may result in data loss due to a firmware bug.
****** THIS DRIVE MAY OR MAY NOT BE AFFECTED! ******
Buggy and fixed firmware report same version number!
See the following web pages for details:
http://knowledge.seagate.com/articles/en_US/FAQ/223571en
http://sourceforge.net/apps/trac/smartmontools/wiki/SamsungF4EGBadBlocks
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: (20520) 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: ( 342) minutes.
SCT capabilities: (0x003f) 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 0x002f 100 100 051 Pre-fail Always - 6
2 Throughput_Performance 0x0026 252 252 000 Old_age Always - 0
3 Spin_Up_Time 0x0023 067 067 025 Pre-fail Always - 10050
4 Start_Stop_Count 0x0032 097 097 000 Old_age Always - 3620
5 Reallocated_Sector_Ct 0x0033 252 252 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 252 252 051 Old_age Always - 0
8 Seek_Time_Performance 0x0024 252 252 015 Old_age Offline - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 7754
10 Spin_Retry_Count 0x0032 252 252 051 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 252 252 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 179
181 Program_Fail_Cnt_Total 0x0022 100 100 000 Old_age Always - 25245
191 G-Sense_Error_Rate 0x0022 100 100 000 Old_age Always - 118
192 Power-Off_Retract_Count 0x0022 252 252 000 Old_age Always - 0
194 Temperature_Celsius 0x0002 058 044 000 Old_age Always - 42 (Min/Max 17/56)
195 Hardware_ECC_Recovered 0x003a 100 100 000 Old_age Always - 0
196 Reallocated_Event_Count 0x0032 252 252 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 252 252 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 252 252 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0036 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x002a 100 100 000 Old_age Always - 26
223 Load_Retry_Count 0x0032 252 252 000 Old_age Always - 0
225 Load_Cycle_Count 0x0032 095 095 000 Old_age Always - 52350
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 0
Note: revision number not 1 implies that no selective self-test has ever been run
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Completed [00% left] (0-65535)
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.
Вроде без особого криминала.
А теперь представим себе, что всё это без zfs массива. Как бы я узнал, что из прорвы секторов один решил сгинуть и важнее, его как бы исправил?
[Текущий отчёт]
pool: Pool
state: ONLINE
scan: scrub in progress since Sat Feb 9 09:46:15 2013
4.01T scanned out of 9.01T at 308M/s, 4h43m to go
4K repaired, 44.48% done
config:
NAME STATE READ WRITE CKSUM
Pool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada3 ONLINE 0 0 0
ada2 ONLINE 0 0 0 (repairing)
ada1 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada5 ONLINE 0 0 0
Видно, что один сектор проблемный на ada2
Смотрим его смарт
[SMART ada2]
Device /dev/ada2 - SAMSUNG HD204UI 1AQ10001
=== START OF INFORMATION SECTION ===
Model Family: SAMSUNG SpinPoint F4 EG (AF)
Device Model: SAMSUNG HD204UI
Serial Number: S2H7JD1Z904896
LU WWN Device Id: 5 0024e9 00414e5b3
Firmware Version: 1AQ10001
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 6
SATA Version is: SATA 2.6, 3.0 Gb/s
Local Time is: Sat Feb 9 13:36:29 2013 MSK
==> WARNING: Using smartmontools or hdparm with this
drive may result in data loss due to a firmware bug.
****** THIS DRIVE MAY OR MAY NOT BE AFFECTED! ******
Buggy and fixed firmware report same version number!
See the following web pages for details:
http://knowledge.seagate.com/articles/en_US/FAQ/223571en
http://sourceforge.net/apps/trac/smartmontools/wiki/SamsungF4EGBadBlocks
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: (20520) 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: ( 342) minutes.
SCT capabilities: (0x003f) 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 0x002f 100 100 051 Pre-fail Always - 6
2 Throughput_Performance 0x0026 252 252 000 Old_age Always - 0
3 Spin_Up_Time 0x0023 067 067 025 Pre-fail Always - 10050
4 Start_Stop_Count 0x0032 097 097 000 Old_age Always - 3620
5 Reallocated_Sector_Ct 0x0033 252 252 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 252 252 051 Old_age Always - 0
8 Seek_Time_Performance 0x0024 252 252 015 Old_age Offline - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 7754
10 Spin_Retry_Count 0x0032 252 252 051 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 252 252 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 179
181 Program_Fail_Cnt_Total 0x0022 100 100 000 Old_age Always - 25245
191 G-Sense_Error_Rate 0x0022 100 100 000 Old_age Always - 118
192 Power-Off_Retract_Count 0x0022 252 252 000 Old_age Always - 0
194 Temperature_Celsius 0x0002 058 044 000 Old_age Always - 42 (Min/Max 17/56)
195 Hardware_ECC_Recovered 0x003a 100 100 000 Old_age Always - 0
196 Reallocated_Event_Count 0x0032 252 252 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 252 252 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 252 252 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0036 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x002a 100 100 000 Old_age Always - 26
223 Load_Retry_Count 0x0032 252 252 000 Old_age Always - 0
225 Load_Cycle_Count 0x0032 095 095 000 Old_age Always - 52350
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 0
Note: revision number not 1 implies that no selective self-test has ever been run
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Completed [00% left] (0-65535)
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.
Вроде без особого криминала.
А теперь представим себе, что всё это без zfs массива. Как бы я узнал, что из прорвы секторов один решил сгинуть и важнее, его как бы исправил?