Hi, I have this one drive that dropped out of one of my arrays once. It shows UNC errors in SMART (log appended), and Reported_Uncorrect is 5. There are no smart test failures or any other SMART values that look spectacularly wrong, other than maybe Load_Cycle_Count which is 10625 (these seagates used to constantly park and unpark before i updated the firmware). I'm wondering whether or not this drive is still safe to use. I feel like I can't trust it, especially after all the other Seagates I had that failed in the past few years. I'm running a tool called whdd on it right now and it shows very consistent latency spikes above 150ms. Really, I'm wondering if this drive is RMAable as is, or if i have to wait for it to degrade further as i have another drive with like 10k reallocated sectors to send in. I have already replaced both with WD Red's so I can do whatever tests are needed to figure it out. Thanks for any help, SMART log: # smartctl -a /dev/sdf smartctl 6.4 2014-10-07 r4002 [x86_64-linux-4.0.0-1-amd64] (local build) Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.14 (AF) Device Model: ST3000DM001-9YN166 Serial Number: W1F2G312 LU WWN Device Id: 5 000c50 060014689 Firmware Version: CC4H User Capacity: 3,000,592,982,016 bytes [3.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 7200 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS T13/1699-D revision 4 SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Tue May 19 04:42:33 2015 MDT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART Status not supported: Incomplete response, ATA output registers missing SMART overall-health self-assessment test result: PASSED Warning: This result is based on an Attribute check. 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: ( 592) 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: ( 345) minutes. Conveyance self-test routine recommended polling time: ( 2) minutes. SCT capabilities: (0x3085) SCT Status 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 115 099 006 Pre-fail Always - 100468288 3 Spin_Up_Time 0x0003 092 091 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 526 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 069 060 030 Pre-fail Always - 9795200 9 Power_On_Hours 0x0032 094 094 000 Old_age Always - 5590 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 36 183 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 095 095 000 Old_age Always - 5 188 Command_Timeout 0x0032 100 099 000 Old_age Always - 0 0 1 189 High_Fly_Writes 0x003a 099 099 000 Old_age Always - 1 190 Airflow_Temperature_Cel 0x0022 064 054 045 Old_age Always - 36 (Min/Max 35/36) 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 - 524 193 Load_Cycle_Count 0x0032 095 095 000 Old_age Always - 10625 194 Temperature_Celsius 0x0022 036 046 000 Old_age Always - 36 (0 18 0 0 0) 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 - 5572h+04m+02.074s 241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 44489827126891 242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 22877192047256 SMART Error Log Version: 1 ATA Error Count: 5 CR = Command Register [HEX] FR = Features Register [HEX] SC = Sector Count Register [HEX] SN = Sector Number Register [HEX] CL = Cylinder Low Register [HEX] CH = Cylinder High Register [HEX] DH = Device/Head Register [HEX] DC = Device Command Register [HEX] ER = Error register [HEX] ST = Status register [HEX] Powered_Up_Time is measured from power on, and printed as DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes, SS=sec, and sss=millisec. It "wraps" after 49.710 days. Error 5 occurred at disk power-on lifetime: 5309 hours (221 days + 5 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER ST SC SN CL CH DH -- -- -- -- -- -- -- 40 51 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 60 00 c0 ff ff ff 4f 00 48d+03:55:47.791 READ FPDMA QUEUED 61 00 80 ff ff ff 4f 00 48d+03:55:47.791 WRITE FPDMA QUEUED e5 00 00 00 00 00 00 00 48d+03:55:47.784 CHECK POWER MODE 60 00 08 08 00 00 40 00 48d+03:55:47.755 READ FPDMA QUEUED 60 00 08 00 00 00 40 00 48d+03:55:47.751 READ FPDMA QUEUED Error 4 occurred at disk power-on lifetime: 5309 hours (221 days + 5 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER ST SC SN CL CH DH -- -- -- -- -- -- -- 40 51 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 60 00 00 ff ff ff 4f 00 48d+03:55:44.672 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:44.672 READ FPDMA QUEUED 60 00 c0 ff ff ff 4f 00 48d+03:55:44.672 READ FPDMA QUEUED 60 00 08 ff ff ff 4f 00 48d+03:55:44.672 READ FPDMA QUEUED 60 00 08 00 00 00 40 00 48d+03:55:44.672 READ FPDMA QUEUED Error 3 occurred at disk power-on lifetime: 5309 hours (221 days + 5 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER ST SC SN CL CH DH -- -- -- -- -- -- -- 40 51 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 60 00 00 ff ff ff 4f 00 48d+03:55:41.802 READ FPDMA QUEUED 60 00 08 ff ff ff 4f 00 48d+03:55:41.802 READ FPDMA QUEUED 60 00 c0 ff ff ff 4f 00 48d+03:55:41.802 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:41.802 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:41.801 READ FPDMA QUEUED Error 2 occurred at disk power-on lifetime: 5309 hours (221 days + 5 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER ST SC SN CL CH DH -- -- -- -- -- -- -- 40 51 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 60 00 08 ff ff ff 4f 00 48d+03:55:38.809 READ FPDMA QUEUED 60 00 08 ff ff ff 4f 00 48d+03:55:38.793 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:38.793 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:38.792 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:38.792 READ FPDMA QUEUED Error 1 occurred at disk power-on lifetime: 5309 hours (221 days + 5 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER ST SC SN CL CH DH -- -- -- -- -- -- -- 40 51 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 60 00 00 ff ff ff 4f 00 48d+03:55:35.636 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:35.636 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:35.636 READ FPDMA QUEUED 60 00 40 ff ff ff 4f 00 48d+03:55:35.636 READ FPDMA QUEUED 60 00 00 ff ff ff 4f 00 48d+03:55:35.636 READ FPDMA QUEUED 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% 5574 - # 2 Extended offline Completed without error 00% 5571 - # 3 Extended offline Completed without error 00% 5561 - # 4 Short offline Completed without error 00% 5556 - # 5 Short offline Completed without error 00% 5553 - # 6 Short offline Completed without error 00% 5529 - # 7 Short offline Completed without error 00% 5505 - # 8 Short offline Completed without error 00% 5481 - # 9 Short offline Completed without error 00% 5457 - #10 Short offline Completed without error 00% 5433 - #11 Short offline Completed without error 00% 5409 - #12 Short offline Completed without error 00% 5385 - #13 Short offline Completed without error 00% 5361 - #14 Short offline Completed without error 00% 5337 - #15 Short offline Completed without error 00% 5313 - #16 Short offline Completed without error 00% 5289 - #17 Short offline Completed without error 00% 5265 - #18 Short offline Completed without error 00% 5241 - #19 Short offline Completed without error 00% 5217 - #20 Short offline Completed without error 00% 5193 - #21 Short offline Completed without error 00% 5169 - 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. -- Thomas Fjellstrom thomas@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html