best settings for usb2 and attached disks, and sdcards

[bob prohaska]

On Thu, Mar 08, 2018 at 10:46:36AM +0100, Bernd Walter wrote:
> 
> I'm currently very pleased with the SanDisk Extreme Plus micro SD
> cards.
> They are quite expensive, but behave way better with random writes.
> 
I don't think I've seen Sandisk Extreme Plus devices, how do they differ
from "ordinary" Sandisk extreme devices? I think there is a "Pro" version,
is that the same thing?

> Event better in random write performance are the SanDisk Extreme
> USB sticks.
> Also quite expensive though and quite big.
> 
Likewise, my experiece, spread over 4 RPi2's and 2 RPi3's, has been good.

> I can't tell, however, if they are better in case of power loss
> related data corruption.
> 

Never done a systematic test, but accidental unplugs and power cycles
after a crash have never caused problems fsck -f won't fix.

hth,

bob prohaska