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Could not write to device, result == -1 errno 0 null

See original GitHub issue

Hi, @magnusja Libaums version 0.7.3

Hardware devices:

usb device 1: SanDisk dual-drive 128Gb with Fat32, 32/64 Kb cluster size;
usb device 2: JetFlash 8Gb with Fat32, 32/4 Kb cluster size;
android version 9(Samsung Galaxy S10e)/8(Xiaomi Redmi 5 Plus)

Problem

I try to copy about 1000 mixed size/type files (total size 2 Gb).

Expected behavior

Files were copied correctly.

Actual behavior

java.io.IOException: Could not write to device, result == -1 errno 0 null

Stacktrace of Excpetion

Code where problem occurs

UsbFileOutputStream.write(bytes);

Any hints!

Thanks a lot!

Issue Analytics

State:
Created 4 years ago
Comments:63 (20 by maintainers)

Top GitHub Comments

1reaction

magnusjacommented, Feb 21, 2020

Unfortunately I am out of ideas 😕

I would suggest that you try to debug that on your own and let us know if you have any further insights. Another option is to switch to standard Android file API if your device supports mounting of USB drives out of the box. (Which most of the modern devices should I think)

1reaction

magnusjacommented, Jan 10, 2020

Hey @kuza2010

thanks a lot for testing. That looks a lot like @Depau 's results, unfortunately 😕

@Depau Cool then I guess I will start playing around with libusb. There is also the UsbRequest API which might be worth trying https://github.com/magnusja/libaums/blob/develop/libaums/src/main/java/com/github/mjdev/libaums/usb/UsbRequestCommunication.kt

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