Folks, I'm trying to understand the following logs for my sata drive. These logs are seen immediately after 'reboot -f'. This is not seen everytime a reboot is performed. A power-cycle ensures that it is boots up fine. Please help explain the reason for the 'timeout'. Please suggest what needs to be done to ensure that reboot succeeds without hitting this error? -x- reboot -f Failed to read reboot parameter file: No such file or directory Rebooting. [ 929.916076] ata6.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen [ 930.007059] ata6.00: failed command: READ FPDMA QUEUED [ 930.072375] ata6.00: cmd 60/20:00:00:08:00/00:00:00:00:00/40 tag 0 ncq dma 16384 in [ 930.072375] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 930.264519] ata6.00: status: { DRDY } [ 930.312264] ata1.00: exception Emask 0x0 SAct 0x6fffffff SErr 0x0 action 0x6 frozen [ 930.409971] ata1.00: failed command: WRITE FPDMA QUEUED [ 930.476424] ata1.00: cmd 61/08:00:fc:d5:82/00:00:05:00:00/40 tag 0 ncq dma 4096 out [ 930.476424] res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 930.668747] ata1.00: status: { DRDY } … [ 930.668747] ata1.00: status: { DRDY } [ 930.716506] ata1.00: failed command: WRITE FPDMA QUEUED [ 930.782810] ata1.00: cmd 61/08:08:8c:d9:82/00:00:05:00:00/40 tag 1 ncq dma 4096 out [ 930.782810] res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 930.975100] ata1.00: status: { DRDY } [ 931.022813] ata1.00: failed command: WRITE FPDMA QUEUED [ 931.089110] ata1.00: cmd 61/08:10:e4:d9:82/00:00:05:00:00/40 tag 2 ncq dma 4096 out [ 931.089110] res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) [ 931.281454] ata1.00: status: { DRDY } [ 931.329235] ata1.00: failed command: WRITE FPDMA QUEUED [ 931.395489] ata1.00: cmd 61/08:18:9c:da:82/00:00:05:00:00/40 tag 3 ncq dma 4096 out [ 931.395489] res 40/00:01:09:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) [ 931.587634] ata1.00: status: { DRDY } [ 931.635372] ata1.00: failed command: WRITE FPDMA QUEUED [ 931.701645] ata1.00: cmd 61/08:20:34:db:82/00:00:05:00:00/40 tag 4 ncq dma 4096 out [ 931.701645] res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 931.893804] ata1.00: status: { DRDY } [ 931.941531] ata1.00: failed command: WRITE FPDMA QUEUED [ 932.007820] ata1.00: cmd 61/08:28:4c:e0:82/00:00:05:00:00/40 tag 5 ncq dma 4096 out [ 932.007820] res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 932.199990] ata1.00: status: { DRDY } [ 932.247731] ata1.00: failed command: WRITE FPDMA QUEUED … [ 939.308610] ata1.00: failed command: WRITE FPDMA QUEUED [ 939.374853] ata1.00: cmd 61/08:f0:2c:d2:82/00:00:05:00:00/40 tag 30 ncq dma 4096 out [ 939.374853] res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) [ 939.567957] ata1.00: status: { DRDY } [ 945.265210] ata6.00: revalidation failed (errno=-5) [ 945.327849] ata1.00: revalidation failed (errno=-5) [ 956.017398] ata1.00: revalidation failed (errno=-5) [ 956.080070] ata6.00: revalidation failed (errno=-5) [ 986.737616] ata6.00: revalidation failed (errno=-5) [ 986.800288] ata1.00: revalidation failed (errno=-5) [ 987.167188] blk_update_request: I/O error, dev sdb, sector 2048 [ 987.167265] blk_update_request: I/O error, dev sda, sector 92459564 lspci -vvv | grep -i sata 00:1f.2 SATA controller: Intel Corporation C610/X99 series chipset 6-Port SATA Controller [AHCI mode] (rev 05) (prog-if 01 [AHCI 1.0]) Subsystem: Intel Corporation C610/X99 series chipset 6-Port SATA Controller [AHCI mode] Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004 pcilib: sysfs_read_vpd: read failed: Input/output error smartctl -a /dev/sda smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.8.28-WR2.2.1_standard-gf2ab372] (local build) Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: StorFly VSFBM8CC200G-JUN Serial Number: P1T14005214001280074 Firmware Version: 0202-000 User Capacity: 200,049,647,616 bytes [200 GB] Sector Size: 512 bytes logical/physical Rotation Rate: Solid State Device Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Wed Nov 4 01:59:20 2020 PST 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: ( 0) seconds. Offline data collection capabilities: (0x71) SMART execute Offline immediate. No Auto Offline data collection support. Suspend Offline collection upon new command. No Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0002) Does not save 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: ( 1) minutes. Conveyance self-test routine recommended polling time: ( 1) minutes. SMART Attributes Data Structure revision number: 1 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x0000 100 100 070 Old_age Offline - 0 5 Reallocated_Sector_Ct 0x0000 100 100 000 Old_age Offline - 0 9 Power_On_Hours 0x0000 100 100 000 Old_age Offline - 240 12 Power_Cycle_Count 0x0000 100 100 000 Old_age Offline - 88 160 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0 161 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 537 163 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 49 164 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 249797 165 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 156 166 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 54 167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 121 168 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 3000 177 Wear_Leveling_Count 0x0000 100 100 050 Old_age Offline - 114 178 Used_Rsvd_Blk_Cnt_Chip 0x0000 100 100 000 Old_age Offline - 0 181 Program_Fail_Cnt_Total 0x0000 100 100 000 Old_age Offline - 0 182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0 187 Reported_Uncorrect 0x0000 100 100 000 Old_age Offline - 0 192 Power-Off_Retract_Count 0x0000 100 100 000 Old_age Offline - 48 194 Temperature_Celsius 0x0000 100 100 000 Old_age Offline - 31 195 Hardware_ECC_Recovered 0x0000 100 100 000 Old_age Offline - 322712 196 Reallocated_Event_Count 0x0000 100 100 016 Old_age Offline - 0 198 Offline_Uncorrectable 0x0000 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0000 100 100 050 Old_age Offline - 0 232 Available_Reservd_Space 0x0000 100 100 000 Old_age Offline - 100 241 Total_LBAs_Written 0x0000 100 100 000 Old_age Offline - 541894 242 Total_LBAs_Read 0x0000 100 100 000 Old_age Offline - 68407 248 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 96 249 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 100 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 6 0 65535 Read_scanning was never started 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. -x- Regards. -sam