[GTALUG] Compressing an image of a microSD card

[Lennart Sorensen]

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