Dump speeds slow down to nothing

[AlexS2412]

Tried with latest release with each second it loses 1mibps in speed. Went from start of 10mibps down to 0 before my dump ever completed.

[DarkMatterCore]

Have you tested it with a different SD card? In all my tests, it ramps up from 0 MiB/s to approximately 7.25 MiB/s, and once it gets there, it keeps that average speed for the whole process. And believe me, I have already lost count on how many times I have dumped Super Mario Odyssey (my only gamecard).

I'm using a 32 GB SanDisk micro SD card (UHC I). Formatted as FAT32.

I haven't had the chance to test with other micro SD cards because this is the only one I have at this moment.

[AlexS2412]

Yes i did text with different sd card actually. This happens every time with no exception.

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On Thu, Jun 28, 2018, 12:52 AM Pablo Curiel ***@***.***> wrote: Have you tested it with a different SD card? In all my tests, it ramps up from 0 MiB/s to approximately 7.25 MiB/s, and once it gets there, it keeps that average speed for the whole process. I'm using a 32 GB SanDisk micro SD card (UHC I). Formatted as FAT32. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANhpNA4w9r8gxsjkBRWbCj8VmTtfWIrNks5uBGEdgaJpZM4U6s5G> .

[DarkMatterCore]

Hmm. It's really weird. Are you using exFAT or FAT32? Using my current test build (with changes unrelated to the dump code) I get the same speeds.

I just made a backup of my SD card, formatted it as exFAT and got a slight speed increase (around 8.50 MiB/s). But it is steadily keeping at that rate.

The code measures the transfer speed using a smoothing factor of 0.05. So it's actually weird it starts straight up from 10 MiB/s and goes down, the smoothing factor should keep it pretty lowered down for the first seconds.

If there is any other kind of information you can provide, I'd greatly appreciate it. Some screenshots or videos would be nice.

[AlexS2412]

If you have discord please contact me as i have been testing for the last 5 hours. My username is Alex S#8291 . It seems it is still slowly dumping and has reached 1.33mibps and has not full stopped yet but is still slowing down.

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On Thu, Jun 28, 2018, 1:33 AM Pablo Curiel ***@***.***> wrote: Hmm. It's really weird. Are you using exFAT or FAT32? Using my current test build (with changes unrelated to the dump code) I get the same speeds. I just made a backup of my SD card, formatted it as exFAT and got a slight speed increase (around 8.50 MiB/s). But it is steadily keeping at that rate. The code measures the transfer speed using a smoothing factor of 0.05. So it's actually weird it starts straight up from 10 MiB/s and goes down, the smoothing factor should keep it pretty lowered down for the first seconds. If there is any other kind of information you can provide, I'd greatly appreciate it. Some screenshots or videos would be nice. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANhpNCuJpPSGcJyvSLi8WIMMOgpK7IO3ks5uBGqcgaJpZM4U6s5G> .

[DarkMatterCore]

Will do. Thanks for willing to help.

This comment will be kept as a placeholder for our findings through Discord. I'll be updating it.

EDIT: After a few tests and an exFAT reformat procedure (using 32 KiB sector alignment), we were able to reproduce the slow transfer speed problem under Windows, which led us to believe the SD card was at fault. Nothing to do here.