This machine isn't a server, but it looks like this is the most relevant place to ask this question.
Yesterday my machine crashed randomly - all the directories in my home folder became read-only. I restarted the machine and was dropped into fsck mode, fsck found some issues and fixed them and my machine booted up fine.
I installed smartmontools and ran all three tests, but I'm having trouble interpreting them. Should I be worried?
sudo smartctl -a /dev/sdb: smartctl 6.1 2013-03-16 r3800 [x86_64-linux-3.8.5-1-ARCH] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Caviar Green (AF, SATA 6Gb/s) Device Model: WDC WD20EARX-00PASB0 Serial Number: WD-WCAZAK297857 LU WWN Device Id: 5 0014ee 25d124d38 Firmware Version: 51.0AB51 User Capacity: 2,000,398,934,016 bytes [2.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Sat Apr 6 13:40:52 2013 BST 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: ( 113) The previous self-test completed having the read element of the test failed. Total time to complete Offline data collection: (40200) 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: ( 387) 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 188 187 051 Pre-fail Always - 1628 3 Spin_Up_Time 0x0027 169 169 021 Pre-fail Always - 6508 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 21 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 098 098 000 Old_age Always - 1614 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 - 13 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 4 193 Load_Cycle_Count 0x0032 199 199 000 Old_age Always - 5029 194 Temperature_Celsius 0x0022 120 115 000 Old_age Always - 30 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 43 198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 38 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 124 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 Conveyance offline Completed: read failure 10% 1598 159375080 # 2 Extended offline Completed: read failure 90% 1591 159375080 # 3 Short offline Completed: read failure 10% 1591 159375080 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.
Looks like you have got one or more bad sectors on your harddrive. There are some spare sectors on the drive, which will replace the broken sectors as soon as they will be written again. (For example, if you rewrite your complete drive with zero/data OR the overwrite the specific sectors only, see here: http://smartmontools.sourceforge.net/ba … owto.html)
Even if your system currently works fine, I would definitiv dd the whole drive to another one or do some other kind of backup, and completely fill the whole drive with zeros. Then run all three S.M.A.R.T tasks again, and check if they will finish without errors. If this is the case, you could recover your backup and use the drive. If not, I would recommend to get a replacement drive.
BTW the data shows that it looks like your running your drive 24h/7, I would also recommend getting a drive that is ment to be run 24/7, like the WDC Red or RE series.
Last edited by silentsnake (2013-04-06 15:46:08)
The way to 'fix' this is to use hdparm --write-sector (and be prepared to lose data and/or break your file system) and the 'LBA_of_first_error', then run fsck and pray. Take a backup first of course.
I've also fought a losing battle for nearly 2 years with a pair of Samsung F3 disks in a 24/7 server scenario. Every week or so they would develop a 'temporary' bad sector (calling it temporary because --write-sector made it disappear and did not increment either of the SMART offline/pending sector values) due to lack of vibration tolerance, and I would lose a few recently-written files. MD-based RAID 1 didn't help at all. Finally gave up and replaced them with Seagate ES.3 disks, problem solved.
Last edited by Darkimmortal (2013-04-07 22:35:48)
Thanks for the info guys. This is my work machine so it's good to know this now while the machine still works!
Because I work for myself (and I'm working like a dog right now), My machine is essentially on 24/7.
I'll buy a replacement drive which is meant to be ran 24/7 as silentsnake suggests, and then backup to it and run darkimmortal's suggestions to see what happens.
I'll let you know how it goes. Thanks very much for your help!
So my hard-drive finally bit the dust tonight, I have a backup so nothing is lost, but I checked the warranty on the drive and unfortunately the seller bought it overseas which invalidated it. Luckily I bought it through amazon and they are refunding me the full cost of the drive. I've went ahead and bought one of these which I hope won't crap out on me!