I have a server with three identical SATA/600 3TB drives:
/dev/sdc. The drives are partitioned, using GPT with three partitions each:
- 1 MB: Reserved partition for boot loader
- 1 GB: RAID1 /dev/md0 ( ext2 ( /boot ) )
- 3 TB: RAID1 /dev/md1 ( encrypted volume ( LVM ( volume group ( Swap, /, /etc, /home ... ) ) ) )
One of the three drives is a hot spare and the other two are active in the RAID sets. It works fine and I am able to boot after disconnecting any single HDD. I want to use smartd (part of smartmontools) to monitor the health of the drives and report errors to syslog (which I monitor using logcheck). This server should have as high availability as possible, but it is acceptable that performance is lowered during tests.
Here is the output of
smartctl -a /dev/sda:
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-4-amd64] (local build) Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Device Model: WDC WD30EZRX-00MMMB0 Serial Number: WD-WMAWZ0412093 LU WWN Device Id: 5 0014ee 2b19fbdcd Firmware Version: 80.00A80 User Capacity: 3,000,592,982,016 bytes [3.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Fri Sep 27 15:37:25 2013 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: (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: (50280) 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: ( 255) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x3035) 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 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 148 148 021 Pre-fail Always - 9575 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 95 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 820 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 - 93 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 65 193 Load_Cycle_Count 0x0032 196 196 000 Old_age Always - 12824 194 Temperature_Celsius 0x0022 119 116 000 Old_age Always - 33 196 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 200 200 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 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 Short offline Completed without error 00% 787 - # 2 Extended offline Completed without error 00% 727 - 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.
It seems offline testing is supported. When I issue
smartctl -o on,
smartctl -c shows that
Offline data collection status has been set to
(0x82). If I issue
smartctl -o off the same value becomes
I have set up smartd to start up with the server by setting
/etc/default/smartmontools. How would you recommend that I configure smartd by editing
/etc/smartd.conf for this server? Please describe each parameter you use and why you use it the way you do.
I will add my current set up as an answer. Feel free to use it as a base and improve it in your own answer. A better description using the same set up would be an improvement too!