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Форумы / Hardware [игнор отключен] [закрыт для гостей] / диски в raid1 нагружены по-разному, в smart немного отличаются. Почему?
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диски в raid1 нагружены по-разному, в smart немного отличаются. Почему?
    #37585178
netwind
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netwind
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Есть в centos 5.7 dm raid1, созданный самым обычным образом без всяких там --write-mostly

 
mdadm --query --detail /dev/md2
/dev/md2:
Version : 0.90
Creation Time : Mon Sep 26 17:15:23 2011
Raid Level : raid1
Array Size : 959875648 (915.41 GiB 982.91 GB)
Used Dev Size : 959875648 (915.41 GiB 982.91 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Persistence : Superblock is persistent

Update Time : Tue Dec 20 15:32:46 2011
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0

UUID : 5695553:2e55553:aef55555:55555
Events : 0.42

Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2


Однако не понятно это ОС его неправильно нагружает или просто первый диск sda сам по себе тормознее попался?

явно у sda большая утилизация. вот вывод iostat -x с периодом 60 секунд чтобы сгладить неравномерности :
 
iostat -x 60 sda sdb
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avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          22.48    0.61    3.36    6.86    0.00   66.70

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda              13.86   203.28 121.12 64.35 14287.82  2141.18    88.58    11.83   63.76   1.96  36.43
sdb               6.44   206.03 12.16 160.60   747.43 14813.79    90.07     8.35   48.32   1.69  29.26

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          22.17    1.34    4.03   11.02    0.00   61.43

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda               7.17    76.03 13.13 65.83  1390.27  1135.07    31.98    18.62  235.86   4.87  38.47
sdb               6.35    75.52 13.95 66.37  1119.33  1135.07    28.07     3.47   43.21   2.94  23.60

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          21.77    1.49    4.00    8.78    0.00   63.95

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda               5.35    80.58 11.60 72.58   958.80  1225.33    25.94    15.53  184.44   4.31  36.27
sdb               8.08    80.60 18.12 72.55  1675.47  1225.20    31.99     3.93   43.31   3.22  29.20

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          20.97    2.18    3.92   12.25    0.00   60.67

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda               8.00    74.78 20.88 66.93  1574.00  1133.73    30.83    19.67  223.93   5.07  44.53
sdb               7.65    74.83 19.45 66.90  1535.47  1133.87    30.91     3.71   43.04   3.03  26.14

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          19.74    1.75    3.57   11.29    0.00   63.65

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda               9.63    73.08 23.33 64.83  1764.93  1103.47    32.53    18.41  208.79   4.71  41.57
sdb               8.70    72.90 18.73 65.02  1682.93  1103.47    33.27    10.18  121.45   4.10  34.36

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          17.87    1.88    3.70   10.12    0.00   66.42

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sda              10.37    86.32 22.55 68.18  2019.07  1236.13    35.88    21.20  233.64   4.68  42.49
sdb               9.67    85.55 22.18 68.97  1862.13  1236.13    33.99     3.88   42.60   3.00  27.31


 
smartctl -a /dev/sda
Код: plaintext
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smartctl 5.41 2011-06-09 r3365 [x86_64-linux-2.6.18-238.el5] (local build)
Copyright (C) 2002-11 by Bruce Allen,  http://smartmontools.sourceforge.net 

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda Green (Adv. Format)
Device Model:     ST1000DL002-9TT153
Serial Number:    W1XXXXX
LU WWN Device Id: 5 000c50 03555555
Firmware Version: CC32
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
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 4
Local Time is:    Tue Dec 20 15:01:47 2011 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
See vendor-specific Attribute list for marginal Attributes.

General SMART Values:
Offline data collection status:  (0x82)	Offline data collection activity
					was completed without error.
					Auto Offline Data Collection: Enabled.
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: 		(  612) 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: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 ( 162) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x30b7)	SCT Status supported.
					SCT Feature Control supported.
					SCT Data Table supported.

SMART Attributes Data Structure revision number: 10
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   118   099   006    Pre-fail  Always       -       189091744
  3 Spin_Up_Time            0x0003   092   092   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       25
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   084   060   030    Pre-fail  Always       -       4629530011
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       2039
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       25
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       18
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   057   038   045    Old_age   Always   In_the_past 43 (0 131 45 42)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       22
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       25
194 Temperature_Celsius     0x0022   043   062   000    Old_age   Always       -       43 (0 22 0 0)
195 Hardware_ECC_Recovered  0x001a   034   021   000    Old_age   Always       -       189091744
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
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       127831111632888
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3969161646
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       1382606765

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  


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.

и
 
smartctl -a /dev/sdb
Код: plaintext
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smartctl 5.41 2011-06-09 r3365 [x86_64-linux-2.6.18-238.el5] (local build)
Copyright (C) 2002-11 by Bruce Allen,  http://smartmontools.sourceforge.net 

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda Green (Adv. Format)
Device Model:     ST1000DL002-9TT153
Serial Number:    W1XXXXXX
LU WWN Device Id: 5 000c50 0355555c
Firmware Version: CC32
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
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 4
Local Time is:    Tue Dec 20 15:01:47 2011 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
See vendor-specific Attribute list for marginal Attributes.

General SMART Values:
Offline data collection status:  (0x82)	Offline data collection activity
					was completed without error.
					Auto Offline Data Collection: Enabled.
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: 		(  612) 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: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 ( 168) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x30b7)	SCT Status supported.
					SCT Feature Control supported.
					SCT Data Table supported.

SMART Attributes Data Structure revision number: 10
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   117   099   006    Pre-fail  Always       -       123923072
  3 Spin_Up_Time            0x0003   093   093   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       25
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   085   060   030    Pre-fail  Always       -       339182914
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       2038
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       25
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       12
189 High_Fly_Writes         0x003a   089   089   000    Old_age   Always       -       11
190 Airflow_Temperature_Cel 0x0022   055   038   045    Old_age   Always   In_the_past 45 (0 134 46 43)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       22
193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       25
194 Temperature_Celsius     0x0022   045   062   000    Old_age   Always       -       45 (0 21 0 0)
195 Hardware_ECC_Recovered  0x001a   035   020   000    Old_age   Always       -       123923072
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
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       13043815679991
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3842120637
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       3950662564

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  


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.

разница diff
Код: plaintext
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< recommended polling time: 	 ( 162) minutes.
---
> recommended polling time: 	 ( 168) minutes.
59,60c59,60
<   1 Raw_Read_Error_Rate     0x000f   118   099   006    Pre-fail  Always       -       189091744
<   3 Spin_Up_Time            0x0003   092   092   000    Pre-fail  Always       -       0
---
>   1 Raw_Read_Error_Rate     0x000f   117   099   006    Pre-fail  Always       -       123923072
>   3 Spin_Up_Time            0x0003   093   093   000    Pre-fail  Always       -       0
63,64c63,64
<   7 Seek_Error_Rate         0x000f   084   060   030    Pre-fail  Always       -        4629530011 
<   9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       2039
---
>   7 Seek_Error_Rate         0x000f   085   060   030    Pre-fail  Always       -        339182914 
>   9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       2038
70,72c70,72
< 188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       18
< 189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
< 190 Airflow_Temperature_Cel 0x0022   057   038   045    Old_age   Always   In_the_past 43 (0 131 45 42)
---
> 188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       12
> 189 High_Fly_Writes         0x003a   089   089   000    Old_age   Always       -       11
> 190 Airflow_Temperature_Cel 0x0022   055   038   045    Old_age   Always   In_the_past 45 (0 134 46 43)
76,77c76,77
< 194 Temperature_Celsius     0x0022   043   062   000    Old_age   Always       -       43 (0 22 0 0)
< 195 Hardware_ECC_Recovered  0x001a   034   021   000    Old_age   Always       -       189091744
---
> 194 Temperature_Celsius     0x0022   045   062   000    Old_age   Always       -       45 (0 21 0 0)
> 195 Hardware_ECC_Recovered  0x001a   035   020   000    Old_age   Always       -       123923072
81,83c81,83
< 240  Head_Flying_Hours        0x0000   100   253   000    Old_age   Offline      -        127831111632888 
< 241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3969161646
< 242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       1382606765
---
> 240  Head_Flying_Hours        0x0000   100   253   000    Old_age   Offline      -        13043815679991 
> 241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3842120637
> 242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       3950662564
...
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20.12.2011, 15:48
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Форумы / Hardware [игнор отключен] [закрыт для гостей] / диски в raid1 нагружены по-разному, в smart немного отличаются. Почему?
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