# Linux Kernel Module Cheat

##### 35.3.1.4. Samsung MZVLB512HAJQ-000L7 512GB SSD

PCIe TLC OPAL2.

https://www.samsung.com/semiconductor/ssd/client-ssd/MZVLB512HAJQ/ (archive).

https://www.samsung.com/semiconductor/global.semi/file/resource/2018/05/PM981_M.2_SSD_Datasheet_v1.3_for_General.pdf | http://web.archive.org/web/20181224225410/https://www.samsung.com/semiconductor/global.semi/file/resource/2018/05/PM981_M.2_SSD_Datasheet_v1.3_for_General.pdf

`sudo hdparm -Tt /dev/nvme0n1p5` on Ubuntu 20.04:

     Timing cached reads:   29812 MB in  1.99 seconds = 15007.00 MB/sec
     HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
     Timing buffered disk reads: 6328 MB in  3.00 seconds = 2109.00 MB/sec

Nominal maximum sequential read speed: 3,000 MB/s