Arch Linux

lang2

Member

Registered: 2006-02-10

Posts: 386

USB device umount takes a long time

Hi all,

I've just noticed that cp a 100M to a USB (2.0) device and umount it takes a rather long time! Up to 5+ minutes. Of course it could be the device itself. But there is degradation since last night. Anybody notice this or something similar?

lang2

toad

Member

From: if only I knew

Registered: 2008-12-22

Posts: 1,775

Website

Re: USB device umount takes a long time

try reformatting your usb device?

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lang2

Member

Registered: 2006-02-10

Posts: 386

Re: USB device umount takes a long time

thanks. why would that help?

anonymous_user

Member

Registered: 2009-08-28

Posts: 3,059

Re: USB device umount takes a long time

Maybe the 100MB file wasn't copied immediately, so when you unmount it has to wait for cp to finish?

lang2

Member

Registered: 2006-02-10

Posts: 386

Re: USB device umount takes a long time

Maybe the 100MB file wasn't copied immediately, so when you unmount it has to wait for cp to finish?

I understand that. But it should take nowhere near what's taking now. Running 'sync' manually takes a long time as well.

anonymous_user

Member

Registered: 2009-08-28

Posts: 3,059

Re: USB device umount takes a long time

Have you tried with a different USB drive?

lang2

Member

Registered: 2006-02-10

Posts: 386

Re: USB device umount takes a long time

Just tried another USB key and it's much faster. Under 2 min for the same file.