File copy to NTFS formatted USB device very slow
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu |
Confirmed
|
Undecided
|
Unassigned | ||
Bug Description
I've recently purchased a 16GB USB flash drive. Under windows it has a write speed of 5.2MB/s, however under Hardy Beta, it starts off at about 2.5MB/s after mounting, and gradually slows down as more data is copied to it, either as a single large file or as many small files, whether copied individually or in batches. I just copied a 4.4GB file to the device and it took over two hours . Copying a similar 4.4GB file to the device under Windows XP takes about 15 minutes.
After un-mounting then re-mounting, copying a 700MB file to it finishes in under 10 minutes. Each time I re-mount the device, a new folder appears under /media, which has the name of the flash drive with an underscore appended. After mounting the device, then un-mounting and re-mounting it twice, there are three folders under media, called "UbuntuStuff", "UbuntuStuff_" and "UbuntuStuff__"
Description: Ubuntu hardy (development branch)
Release: 8.04
I've since noticed that this problem is also affecting network transfers - file copies across ethernet bottom out at 5MB/s, which, although better than the sub 1MB/s I get on my flash drive, is still very frustrating. On the plus side, the release candidate of Hardy allows file copies to work at full speed for a couple of minutes before the degradation kicks in, so if I'm fast, I can get my copying done.
My server is a DNS-323. and I'm mounting it as nfs, not using Samba.