[DragonFlyBSD - Bug #1231] (Closed) The problem with USB stick and msdosfs

Antonio M. Huete Jimenez via Redmine bugtracker-admin at leaf.dragonflybsd.org
Sat Mar 9 13:24:08 PST 2013

Issue #1231 has been updated by tuxillo.

Description updated
Status changed from New to Closed
Assignee deleted (0)


msdos(5) is much faster now. I use to copy big files to my usb stick, and I don't get those slow transfers.

Antonio Huete
Bug #1231: The problem with USB stick and msdosfs

Author: hasso
Status: Closed
Priority: Normal
Target version: 

da0: <pqi IntelligentStick 0.00> Removable Direct Access SCSI-2 device
da0: 40.000MB/s transfers
da0: 963MB (1974271 512 byte sectors: 64H 32S/T 963C)

$ sudo dd if=/dev/zero of=/mnt/file bs=512k count=100
100+0 records in
100+0 records out
52428800 bytes transferred in 1.744845 secs (30047824 bytes/sec)
$ time sudo umount /mnt
real    4m7.152s 	<- ?!?!?! 
user    0m0.008s
sys     0m0.047s

It doesn't happen with any other OS (tried Debian, MacOSX and Windows XP) 
and there is no problem in DragonFly with the very same formatted to UFS 

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