14 May
2020
14 May
'20
10:04 p.m.
On Thu, May 14, 2020 at 05:20:18PM -0400, D. Hugh Redelmeier via talk wrote:
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.
I think the idea was to do it on the image loop back mounted, not on the original device. -- Len Sorensen