RetroPie forum home
    • Recent
    • Tags
    • Popular
    • Home
    • Docs
    • Register
    • Login
    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    Running roms off a USB

    Scheduled Pinned Locked Moved Help and Support
    romsusb stick
    35 Posts 11 Posters 37.3k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • iconrumbleI
      iconrumble @Dominus
      last edited by

      @Dominus instead of symlink the entire "psx" folder, you can keep the "psx" folder on the sd and create two symlinks inside that, each one for each usb.
      Example:
      go to home/retropie/roms/psx;
      enter sudo ln -s /media/usb0/psx USB0 --> this creates the symlink for the fist usb
      enter sudo ln -s /media/usb1/psx USB1 --> this creates the symlink for the second usb
      don't forget to confirm the usb paths.

      DominusD 2 Replies Last reply Reply Quote 0
      • DominusD
        Dominus @iconrumble
        last edited by

        @iconrumble Thanks man! That is so much easier then what is explained in the wiki. I haven't tried the 2 usb Symbolic Link to same folder, but at least I know it is possible. Thanks!

        1 Reply Last reply Reply Quote 0
        • J
          Juakin @iconrumble
          last edited by Juakin

          @iconrumble said in Running roms off a USB:

          you can use the usb the two ways. I personally have console roms on my sd card and have an usb stick for psx isos
          My usb gets automounted on boot; I then added a symbolic link in the retropie roms folder linking the folder on the usb with the psx isos, using ln -s [target] [linkname].

          Dude, this is exactly the way I want to configure my RetroPie, can you please explain (or give a link) on how to automount USB's on Retropie??
          Also, if you place a PSX iso in /home/pi/RetroPie/roms/psx and at the same time have more of them in /media/usb0/roms/psx will load all of them, or you can only see the ones on the USB??

          iconrumbleI 1 Reply Last reply Reply Quote 0
          • DominusD
            Dominus @iconrumble
            last edited by

            @iconrumble I never did no automounting, do I have to do that?!? It seems to have worked already?

            1 Reply Last reply Reply Quote 0
            • J
              Juakin
              last edited by

              @iconrumble nevermind I've already done it...
              @Dominus I had to, my usb's didn't mount automatically when I connected them, In fact if I was on the desktop (lxde) and connect one of them it asked for a password, so yes, I had to edit the "fstab" file and add automount to my devices.

              1 Reply Last reply Reply Quote 0
              • iconrumbleI
                iconrumble @Juakin
                last edited by

                @Juakin In my case, I swapped the psx folder on the sd card with a symlink, so I can only see isos on the usb. You could create the symlink inside the sd psx folder (just like a subfolder), that way you can put isos in the sd card and the usb.

                @Dominus @Juakin My 64gb fat32 usb get's automounted at boot, I didn't have to edit the fstab or do anything else. I'm running of retropie 3.8 image updated to 4.0.1

                J 1 Reply Last reply Reply Quote 0
                • J
                  Juakin @iconrumble
                  last edited by

                  @iconrumble said in Running roms off a USB:

                  @Juakin In my case, I swapped the psx folder on the sd card with a symlink, so I can only see isos on the usb. You could create the symlink inside the sd psx folder (just like a subfolder), that way you can put isos in the sd card and the usb.

                  That's exactly what I did, now I can load my ISOS from both places.
                  Thanks for the info.

                  1 Reply Last reply Reply Quote 0
                  • AndersHPA
                    AndersHP
                    last edited by AndersHP

                    Wow, having just read this topic I'm getting convinced that even I can do this.

                    Does this generally slow down or in other ways stress the Retropie? And what are the exact benefits of running ROMs off a USB, if there's Space enough on the SD?

                    Apart from that, do you just use USB Sticks, or USB external harddives? Are there any min. requirements for the USB (read/write speed etc)?

                    What about Steven Selph's scraper. will this also understand the symlink and still scrape the games?

                    My "Bubble Bobble" Themed Bartop Arcade
                    My Gameboy

                    dankcushionsD 1 Reply Last reply Reply Quote 0
                    • dankcushionsD
                      dankcushions Global Moderator @AndersHP
                      last edited by

                      @AndersHP said in Running roms off a USB:

                      Wow, having just read this topic I'm getting convinced that even I can do this.

                      Does this generally slow down or in other ways stress the Retropie?

                      no. USB transfer will probably be faster than SD cards (?), but in any case it doesn't really matter.

                      And what are the exact benefits of running ROMs off a USB, if there's Space enough on the SD?

                      the benefits are listed here: https://github.com/RetroPie/RetroPie-Setup/wiki/Running-ROMs-from-a-USB-drive

                      Apart from that, do you just use USB Sticks, or USB external harddives?

                      i use a USB stick. a harddrive seems excessive. that amount of ROMs would surely grind ES to a hault.

                      Are there any min. requirements for the USB (read/write speed etc)?

                      no.

                      What about Steven Selph's scraper. will this also understand the symlink and still scrape the games?

                      i don't use symlinks, i use the recommended mount method. i would have thought it would, though.

                      DominusD 1 Reply Last reply Reply Quote 0
                      • spannernick1S
                        spannernick1
                        last edited by spannernick1

                        Edited... question already be asked.

                        1 Reply Last reply Reply Quote 0
                        • DominusD
                          Dominus @dankcushions
                          last edited by

                          @AndersHP @dankcushions
                          I find that save states take a hell of a long time to save! I have PSX and GBA on my USB stick, and I bet it takes 10 seconds or more to save PSX games (loading is pretty instant it seems), and GBA about 5 seconds? Just looking into why that is (could be my USB stick?) or to move the save states to the SD card.

                          dankcushionsD 1 Reply Last reply Reply Quote 0
                          • dankcushionsD
                            dankcushions Global Moderator @Dominus
                            last edited by

                            @Dominus said in Running roms off a USB:

                            @AndersHP @dankcushions
                            I find that save states take a hell of a long time to save! I have PSX and GBA on my USB stick, and I bet it takes 10 seconds or more to save PSX games (loading is pretty instant it seems), and GBA about 5 seconds? Just looking into why that is (could be my USB stick?) or to move the save states to the SD card.

                            it may just be the emulation. the original psx memory cards were slow, so the games / bios may have no idea they are being run on much better hardware. it's the same reason load times still exist for psx games, despite running on machines that could hold the whole ISO in memory.

                            DominusD 1 Reply Last reply Reply Quote 0
                            • DominusD
                              Dominus @dankcushions
                              last edited by

                              @dankcushions I don't know, maybe. But I'm talking about the RetroArch save states not just the regular memory card save points, as those actually work faster lol... plus I have similar issues, though not as long, with the GBA on USB.

                              1 Reply Last reply Reply Quote 0
                              • DominusD
                                Dominus
                                last edited by

                                I just timed it and it took around 23 seconds to save state on PSX, and with GBA it took around 2.5 seconds. I tried 2 different USB sticks so it's not the USB. I don't have mine mounted, would that make a difference?

                                1 Reply Last reply Reply Quote 0
                                • AndersHPA
                                  AndersHP
                                  last edited by AndersHP

                                  Reading the guide on Github, it seems that you have to move the entire RetroPie folder onto the USB.

                                  Does this mean that the SD card in general is not really used anymore? I thought that it was only for running games off the USB drive. But what is exactly getting moved onto the USB? Just to get a better understanding...

                                  Also, the guide says both "copy" and "moving" the above mentioned, but the command states 'mv'... Will some files be present on both SD card and USB drive?

                                  My "Bubble Bobble" Themed Bartop Arcade
                                  My Gameboy

                                  dankcushionsD 1 Reply Last reply Reply Quote 0
                                  • dankcushionsD
                                    dankcushions Global Moderator @AndersHP
                                    last edited by

                                    @AndersHP said in Running roms off a USB:

                                    Reading the guide on Github, it seems that you have to move the entire RetroPie folder onto the USB.

                                    Does this mean that the SD card in general is not really used anymore? I thought that it was only for running games off the USB drive. But what is exactly getting moved onto the USB? Just to get a better understanding...

                                    The retropie folder only contains the roms and bios files. The operating system, setup-script, configs, emulators, etc, are still on the SD.

                                    Also, the guide says both "copy" and "moving" the above mentioned, but the command states 'mv'... Will some files be present on both SD card and USB drive?

                                    yeah that's a mistake - good spot! it moves the folder, not copy. there's no point having it on the SD if it's on the USB.

                                    1 Reply Last reply Reply Quote 0
                                    • AndersHPA
                                      AndersHP
                                      last edited by

                                      So, I just realized that since december, the Github guide has changed, with an auto mount option now available.

                                      I'm about to try this now #fingerscrossed
                                      What I don't understand is, still, the ROMS and Retropie folder seems to get copied, not moved..?

                                      And if the USB ROM transfer service is set to ON (as the guide tells), and I start copying games to my new ROMs dedicated USB, won't the system start copying everything onto the SD card?

                                      My "Bubble Bobble" Themed Bartop Arcade
                                      My Gameboy

                                      1 Reply Last reply Reply Quote 0
                                      • AndersHPA
                                        AndersHP
                                        last edited by

                                        OK, to answer my own questions, if the USB drive is inserted into the Pi, it's read before the RetroPie folder that still exist on the SD card (even figures like normal in the File Manager), and if the USB drive is not inserted, the system looks at the SD card instead.

                                        So what I'm doing now, is after the automount method has copied everything onto the USB, I unplug the USB drive and remove all my ROMs from the File Manager (as this will make the File Manager look at the content of the SD). After that, I can be sure that there's no ROMS on the SD, and everything is running off the USB.

                                        My "Bubble Bobble" Themed Bartop Arcade
                                        My Gameboy

                                        1 Reply Last reply Reply Quote 0
                                        • DominusD
                                          Dominus
                                          last edited by

                                          I'd just open your network \\retropie go to Roms, and delete or cut the folder you want to move to USB. Then go to home/retropie/roms/ and then type sudo ln -s /media/usb0/XXX XXX (XXX for whatever system you want to be used on the USB instead. That's it. It should automount or whatever and load every time! If you want to move all your roms to a USB, do the same thing, but WinSCP into the Pi, go to your Roms directory and delete or cut all of it as before, and then go to home/retropie (in Putty or Commandline btw), and type sudo ln -s /media/usb0/roms roms

                                          1 Reply Last reply Reply Quote 0
                                          • S
                                            skeeto1983
                                            last edited by

                                            I have a question concerning the auto-mount feature and using a USB as a ROM/save state backup. Using the Github guide, I performed the auto USB transfer. It all functioned as designed to setup the USB. I understand that now I will be playing and saving the ROM data to the USB.

                                            My question is if an issue should occur with the SD in the future and I need to restore the retropie image, if I repeat the process as directed, wont RetroPie just perform the copy again with virgin roms and copy over all my USB roms with save states? I'm not exactly sure how this is intended to work.

                                            The only way around this that I can see is to perform a backup of the SD .img file AFTER the transfer to USB has taken place. That way, if you need to restore the image from the backup, the link to the USB drive is already there and it will function as it did previously.

                                            Also, once the transfer to USB is complete with all the ROM data, is there a need to DIS-able the auto-USB transfer function in the retroarch setup menu before I perform the proposed IMG backup as above.

                                            Again, I'm just taking a shot in the dark here with how I assume this might work, I'm all ears for a little assistance.

                                            Thanks in advance
                                            Rob

                                            lostlessL 1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post

                                            Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.

                                            Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.