USB or SD Card for gamelist.xml & images/snaps
So is it better to run the gamelist.xml and or the images/snaps from a USB or SD Card. (Which would be the fastest load times?)
I have all my roms on a usb along with the gamelist.xml and images/snaps, but noticed the sd card also has them ther (But not the roms) look like I forgot to remove them and it loads the SD card version first. So just wondering what is best?
I think the USB hard drive should be faster in most cases. You can check their speed by installing the tool
hdparmand running some tests:
sudo apt install hdparm
Get your disks' device names:
Here, the leftmost entries unter "NAME" are your drives' names, e.g.
mmcblk0for an SD card or
sdafor a hard drive.
Test their speed with their read cache:
sudo hdparm -tT /dev/mmcblk0 # test the sd card sudo hdparm -tT /dev/sda # test the hard drive
Test their speed without their read cache:
sudo hdparm -tT --direct /dev/mmcblk0 # test the sd card sudo hdparm -tT --direct /dev/sda # test the hard drive
The faster one should be used for your gamelist.xml and snaps/videos.
@almulder I keep it all on the USB because if I ever reimage I never have to scrape them again, just a basic plug and play at that point
@clyde Thnaks for the info I will test this this week and find out. :) Just got a high end SD with fast read write and was going to OC the SD card reader. eo see what is faster or how far apart they are. :)
Clyde last edited by Clyde
@almulder Be sure to repeat each test a couple of times (3-5 should suffice), because they tend to fluctuate a little. Also, the non-cached values should match real conditions more, since the cache shouldn't count much if the data hasn't been read before.
Although the Pi's USB 2 ports do limit modern hard drives severely, my Samsung EVO 840 ssd beats my Toshiba Exceria Pro U3 sd card with approx. 36 MB/s to approx. 22 MB/s non-cached reading speed.
Also consider @herb_fargus' point about portability.
Just incase anyone wants my numbers: Ran each test 10 times and got the average.
simpleethat last edited by
I had been wondering about this, thank you!
Going to create a script people can run so they can test it without knowing command lines.
@almulder Good idea. :)
Ok I have created the script if anyone whats to try it out.
Let me know what you think.
@almulder I will, but not immediately, because I'm about to leave. Stay tuned.
One small thing I noticed in your README.md: In this sentence, there seems to be something missing before the word drivetest.png:
Anyways grab the file drivetest.sh and put it in your ./home/pi/RetroPie/retropiemenu drivetest.png and put it in your ./home/pi/RetroPie/retropiemenu/icons
Thanks it was the way they format what I type in. I modified it for easier reading.