# watch -n1 cat /proc/mdstat
Sample outout:
Every 1.0s: cat /proc/mdstat Fri Apr 10 11:16:58 2015
Personalities : [raid10]
md0 : active raid10 sdf1[5] sdj1[9] sdg1[6] sdd1[3] sdi1[8] sdh1[7] sde1[4] sdb1[1] sda1[0] sdc1[2]
19534428160 blocks super 1.2 512K chunks 2 near-copies [10/10] [UUUUUUUUUU]
[===========>.........] resync = 59.0% (11528658368/19534428160) finish=233.7min speed=570851K/sec
bitmap: 61/146 pages [244KB], 65536KB chunk
unused devices: <none>
# watch -n1 iostat -k 1 2
Sample outout:
Every 1.0s: iostat -k 1 2 Fri Apr 10 11:17:31 2015
Linux 2.6.32-431.23.3.el6.x86_64 (some.fqdn.com) 04/10/2015 _x86_64_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
20.34 0.16 6.67 1.74 0.00 71.08
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sdk 1.95 18.72 239.81 1631715 20901329
sdf 150.18 26406.77 16290.58 2301564614 1419856127
sde 186.58 27197.66 3230.58 2370496639 281571519
sdi 189.90 27195.76 3226.94 2370331546 281254427
sdc 187.29 27196.30 3227.99 2370378009 281345479
sdd 177.64 26408.21 16293.83 2301689934 1420139335
sdj 173.33 26408.48 16292.64 2301713769 1420035675
sda 189.55 27196.97 3228.75 2370436486 281412039
sdg 189.33 27195.72 3229.31 2370327509 281460979
sdb 172.44 26408.37 16294.25 2301704308 1420175943
sdh 177.32 26408.63 16294.97 2301726191 1420238643
md0 169.28 4691.05 16121.01 408863356 1405077288
avg-cpu: %user %nice %system %iowait %steal %idle
0.00 0.00 23.02 0.00 0.00 76.98
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sdk 0.00 0.00 0.00 0 0
sdf 210.00 107520.00 0.00 107520 0
sde 1388.00 114176.00 0.00 114176 0
sdi 1345.00 113792.00 0.00 113792 0
sdc 1516.00 114176.00 0.00 114176 0
sdd 1516.00 114112.00 0.00 114112 0
sdj 1342.00 113792.00 0.00 113792 0
sda 1414.00 113792.00 0.00 113792 0
sdg 1572.00 114176.00 0.00 114176 0
sdb 237.00 121344.00 0.00 121344 0
sdh 1517.00 114176.00 64.00 114176 64
md0 0.00 0.00 0.00 0 0
# watch -n5 mdadm --detail /dev/md0
Sample outout:
Every 5.0s: mdadm --detail /dev/md0 Mon Apr 25 12:36:56 2016
/dev/md0:
Version : 1.2
Creation Time : Wed Apr 20 16:22:45 2016
Raid Level : raid10
Array Size : 15627540480 (14903.58 GiB 16002.60 GB)
Used Dev Size : 3906885120 (3725.90 GiB 4000.65 GB)
Raid Devices : 8
Total Devices : 10
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Mon Apr 25 12:19:17 2016
State : clean
Active Devices : 8
Working Devices : 10
Failed Devices : 0
Spare Devices : 2
Layout : near=2
Chunk Size : 512K
Name : mach217:0
UUID : f5fd53a3:caedf390:08aba2ec:afd02b59
Events : 148
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
8 8 81 3 active sync /dev/sdf1
4 8 97 4 active sync /dev/sdg1
5 8 113 5 active sync /dev/sdh1
6 8 129 6 active sync /dev/sdi1
7 8 145 7 active sync /dev/sdj1
9 8 161 - spare /dev/sdk1
10 8 65 - spare /dev/sde1
Find out which device, eg /dev/sdk, is which physical diskdrive
# smartctl -d sat -a /dev/sdk
Sample output:
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-4.2.0-35-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: WDC WD40PURX-64GVNY0
Serial Number: WD-WCC4E5NT0K77 <<<--------------- Find the harddrive with this serial!
LU WWN Device Id: 5 0014ee 2626fd6b1
Firmware Version: 80.00A80
User Capacity: 4,000,787,030,016 bytes [4.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Apr 25 12:39:37 2016 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: (49980) 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: ( 500) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x703d) 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 100 253 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 100 253 021 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 3
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 2
10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 1
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 1
194 Temperature_Celsius 0x0022 116 114 000 Old_age Always - 36
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 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.
