SMART support is: Available - device has SMART capability. SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Sector Sizes: 512 bytes logical, 4096 bytes physicalĭevice is: Not in smartctl database ĪTA Version is: ATA8-ACS T13/1699-D revision 4c Smartctl 6.4 r4109 (local build)Ĭopyright (C) 2002-15, Bruce Allen, Christian Franke, = START OF INFORMATION SECTION = My MacBook 2015 answered this (no 0xf1 ID): smartctl -s on -i -A -f brief -f hex,id -l devstat /dev/disk0 173 (Erase Count, or Wear Leveling) should mean the used up overall sector writes. I installed GSmartControl with Homebrew ( brew install gsmartcontrol), and got this: Then retry the above commands to readout and calculate data written to disk. tests I realized that DriveDx is showing me a note that I dont know what it is, the SMART test does. Use option -s with argument 'on' to enable it.", try smartctl -s on -A /dev/disk0 We include the Adata XPG SX8200 Pro and Intel SSD 660p as two mainstream NVMe contenders. If you get an error like "SMART Disabled. If you get an error like "Read SMART Data failed: Undefined error: 0", try smartctl -A /dev/disk0 first. The smartctl commands above doesn't work very reliable (at least for me). The Temperature attributes should be treated differently than the other SMART attributes, but some apps get confused and it doesn't help that some drives use different attributes to monitor the temp making it harder for apps to provide exceptions. Like already mentioned earlier replace "DiskIdentifier" with the identifier of your internal SSD found with diskutil list. Post the full DriveDx report here using the 'Additional Text' icon which looks like a piece of paper. Read out the following S.M.A.R.T attributes of your SSD with an appropriate tool*:Ģ41 - Total LBAs Written: The total number of 512-byte sectors written during the entire lifetime of the device.Ģ42 - Total LBAs Read: The total number of 512-byte sectors read during the entire lifetime of the device.īut i don't know if the values found in the second set really make sense (at least for me with a 120 GB SSD as one part of a Fusion drive) because considerably more data is written to the SSD than the HDD though the SSD has only 1/25th of the size: 0xae Host_Reads_MiB -CK 100 100 000 - 12268569 (~12 TiB)Ġxaf Host_Writes_MiB -CK 100 100 000 - 16481745 (~16 TiB)Ĭompared to the 3 TB HDD (the second part of the Fusion drive): 0xf1 Total_LBAs_Written - 100 253 000 - 21361815408 (~10 TiB)Ġxf2 Total_LBAs_Read - 100 253 000 - 23925221693 (~11 TiB)Īfter installing smartmontools the following commands give the written data in GB if the attribute "242 Total_LBAs_Written" exists: smartctl -s on -i -A -f brief -f hex,id -l devstat /dev/DiskIdentifier | grep 0xf1 | awk ''įor some SSDs, like the Sandisk Plus 120Gb, the $8 value is already in GB so you'll need to use division to calculate the value.
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