14 May
2020
14 May
'20
9:20 p.m.
| From: Lennart Sorensen via talk <talk@gtalug.org> | If the filesystem is ext based, zerofree is a nice tool to zero unused | space that seems to run faster than using dd and rm with a zero filled | file. If your filesystem lives on some form of flash (SSD, SD card, USB stick, ...) this can reduce the lifetime and performance of your hardware. The wear-levelling firmware of the drive will think that every block of the drive is "live" (contains valuable information). This will increase "write amplification". In any case, if you do do this, be sure to use fstrim afterwards. (I'm not sure that SD cards and USB sticks support trim.