Arch Linux

kotteswaran85

Member

Registered: 2023-02-11

Posts: 16

USB File Copy Super Slow and Stuck

bro.. when i do file transfer to USB pen drive always very slow after 100% completed still not finished it takes alt least 15 minutes for complete ..
so kindly help me to rectify this issue...
thankyou

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 21,626

Re: USB File Copy Super Slow and Stuck

This isn't an issue and normal. The tradeoff is between visual feedback and actual transfer speed where linux will opt for the latter but leave "you" hanging while optimizing the transfer. You can lower the writeback cache for USB devices so the kernel is forced to flush data more often so this delay isn't as jarring, see this earlier thread on the topic: https://bbs.archlinux.org/viewtopic.php?id=284074

teckk

Member

Registered: 2013-02-21

Posts: 519

Re: USB File Copy Super Slow and Stuck

I mount my usb devices with:

mount -o async,flush /dev/sdb1 ~/somewhere

They write and they are done. You don't have to wait for the buffer to write after a pause. It has never been 15 min though. More like 30 seconds.

I don't mean watching the little LED blink, but watching gkrellm.