Bug 411382

Summary:	Trouble copying big files (~3-4 GB each) from an external drive to a USB drive using both the GUI and cp command
Product:	[Applications] dolphin	Reporter:	nmr_privat
Component:	general	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	elvis.angelaccio, nate
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Manjaro
OS:	Linux
Latest Commit:		Version Fixed In:

Description nmr_privat 2019-08-28 10:32:27 UTC

SUMMARY
I'm having trouble copying big files (~3-4 GB each) from an external drive to a USB drive using both the GUI and cp command, both seem to only copy about 200 MB and then stop, I was advised to try the rsync -a command and that worked fine.

STEPS TO REPRODUCE
1. Mount external SSD.
2. Mount USB stick.
3. Try to copy a 3-4 GB file from the SSD to USB stick.

OBSERVED RESULT
Both the GUI and the cp command indicated that they were done copying the file but in reality they both stopped transferring after about 200 MB.

EXPECTED RESULT
I expected that the file would have been completely transferred.

SOFTWARE/OS VERSIONS
Windows: N/A
macOS: N/A
Linux/KDE Plasma: Up-to-date Manjaro using KDE desktop environment running linux kernel 5.2.8-1.
(available in About System)
KDE Plasma Version: 5.16.4
KDE Frameworks Version: 5.60.0
Qt Version: 5.13.0

ADDITIONAL INFORMATION
Both the USB stick and external SSD are exfat formatted with more than enough space to store the files.

Comment 1 Nate Graham 2019-09-03 17:41:04 UTC

If `cp` doesn't work properly either, then the issue is far deeper in the stack than anything KDE software can affect--possibly even the hardware itself. But if `cp` is reporting success when it's actually failing, that's super duper bad. Consider trying with a different cable or disk to isolate the problem. If that doesn't help, please file a kernel bug.