SMART Devices
Listing 1: Checking SMART Capability
# smartctl -i /dev/sda smartctl 7.2 2020-07-11 r5076 [x86_64-linux-5.4.0-42-generic] (CircleCI) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION === Model Family: Samsung based SSDs Device Model: Samsung SSD 840 Series Serial Number: S19HNSAD620520T LU WWN Device Id: 5 002538 5a0050931 Firmware Version: DXT08B0Q User Capacity: 120,034,123,776 bytes [120 GB] Sector Size: 512 bytes logical/physical Rotation Rate: Solid State Device TRIM Command: Available, deterministic, zeroed Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4c SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Sun Aug 2 10:41:21 2020 EDT SMART support is: Available - device has SMART capability. SMART support is: Enabled
Notice the Device is: In smartctl database … line, which indicates that this drive is in the smartctl database, so the SMART attributes and their corresponding values are known. To check on the details, use the -P show option (Listing 2).
Listing 2: Device Details
# smartctl -P show /dev/sda smartctl 7.2 2020-07-11 r5076 [x86_64-linux-5.4.0-42-generic] (CircleCI) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
Drive found in smartmontools Database. Drive identity strings: MODEL: Samsung SSD 840 Series FIRMWARE: DXT08B0Q match smartmontools Drive Database entry: MODEL REGEXP: SAMSUNG SSD PM800 .*GB|SAMSUNG SSD PM810 .*GB
[cut due to length]
FIRMWARE REGEXP: .* MODEL FAMILY: Samsung based SSDs ATTRIBUTE OPTIONS: 170 Unused_Rsvd_Blk_Ct_Chip 171 Program_Fail_Count_Chip 172 Erase_Fail_Count_Chip 173 Wear_Leveling_Count 174 Unexpect_Power_Loss_Ct 187 Uncorrectable_Error_Cnt 191 Unknown_Samsung_Attr 195 ECC_Error_Rate 199 CRC_Error_Count 201 Supercap_Status 202 Exception_Mode_Status 234 Unknown_Samsung_Attr 235 POR_Recovery_Count 236 Unknown_Samsung_Attr 237 Unknown_Samsung_Attr 238 Unknown_Samsung_Attr 243 SATA_Downshift_Ct 244 Thermal_Throttle_St 245 Timed_Workld_Media_Wear 246 Timed_Workld_RdWr_Ratio 247 Timed_Workld_Timer 249 Unknown_Samsung_Attr 250 SATA_Iface_Downshift 251 NAND_Writes
Another useful smartctl option is -c (Listing 3), which only prints the generic SMART capabilities. The somewhat long output lists what SMART features are implemented and how the device will respond to some of the various SMART commands.
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