On 2019-12-11, druck  wrote:
> On 10/12/2019 16:53, Jos Boersema wrote:
>> To prolong SD card life I've tried to put /var, /tmp and /home on a USB
>> 2 stick, but this became too slow or good desktop use.
>>
>> It seems that the /home partition causes a lot of lag when put on USB 2.
>> The /tmp partition on USB 2 also causes some lag. It did not seem to matter
>> if /var was mounted on the SD card or on the USB 2 stick.
>
> A good USB 3.1 stick is much faster than a SD card, even via the USB 2
> of Pi's (prior to 4). I recommend putting the whole of the root
> partition on it, not just certain directories, leaving just boot on the
> SD card. It will be much quicker and the SD card will last indefinitely.
>
> This is what I use https://www.amazon.co.uk/s?k=samsung+usb+3.1+bar+plus
> The cost has come down quite a bit recently, and they come in silver or
> black.

Thanks for the tip, the large one seems to be the fastest.

I tried putting an Iomega zip drive with USB 3 on the Pi as the root
file system, but unfortunately I didn't get it to work. It hangs on
boot "... waiting for root device PARTUUID=....". I used the Raspbian
desktop tool for copying the SD card to put whatever I had on the SD
card unto the zip drive. I had to redo the UUID with uuidgen and
tune2fs, because it seemed to be the same UUID had been copied although
i checked for new UUIDs. I guess I just messed up something ...

This Iomega zip drive seems to take a bit of power. When I plugged it
in the X-server crashed, which seems strange so maybe it was some kind
of power dip. Plugging it in while the Pi is not on gives no problems.
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