Hi Chris,

This is QNX 4 discussion board, but your question about QNX 6 (next version). Please repeat your question in right forum
.

Respectfully,
Oleg

5 сент. 2018 г., в 19:05, Chris Liang <community-noreply@qnx.com> написал:

> Hi,
> 
> I encounter a problem that using cp command to copy a large file (~1GB size) from USB to SD card or vise versa. during
 copying, error out and root directory is gone (/ mount point is umounted).
> 
> The following is verbose from cp:
> cp: LSTAT(/dos/d/,buf)
> cp: LSTAT(/log/file.121,buf)
> cp: copy_guy(/log/file.121,/dos/d///file.121)
> cp: OPEN(/log/file.121,0,0)
> cp: OPEN(/dos/d///file.121,2401,100640)
> cp: LSTAT(/dos/d///file.121,buf)
> cp: Copying /log/file.121 to /dos/d/file.121
> cp: write  (/dos/d///file.121): Input/output error
> cp: ERRS++ (1) write()
> 88.74% (755840/851673 kbytes, 2323 kb/s)
> cp: read   (/log/file.121): Bad file descriptor
> cp: ERRS++ (2) read()
> cp: past_data_copy errs_in =0, errs = 2
> cp: exit_copy_guy (rc=0)
> cp: CLOSE(fildes)
> cp: close  (/log/file.121): Bad file descriptor
> cp: ERRS++ (3) _close()
> cp: CLOSE(fildes)
> cp: close  (/dos/d///file.121): Bad file descriptor
> cp: ERRS++ (4) _close()
> 
> QNX version: 6.4.1
> both SD card and usb key is running on USB bus. I can see during copy devb-umass and io-usb processes are taking CPU 
usages
> 
> what could be the root cause of this?
> 
> Thanks in advance.
> 
> 
> 
> 
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