echo 10 dirty_writeback_centisecs
echo 10 dirty_expire_centisecs
Now it should basically write to the stick continously instead of every
3000 centisecs (30 secs).
I learned when I found that transferring terabytes through my gigabit
results in 30s long pauses, then 80mb/s for a few seconds and
elevator=noop solved it for me also, but just as murz says: sometimes
under heavy disk activity (dd iso - empty sata drive) some parts of
Xorg will pause, sometimes for several minutes.
I can also see that noop writes to the usb drives without pausing.
Normal elevator writes for a few seconds,
sbec67: The difference isn't the file systems, it's that hard drives are
treated differently to USB sticks. As I wrote before... copying to
external drives gives me 15MB/s sustained.
--
file transfers on USB disk are very slow
https://bugs.launchpad.net/bugs/197762
You received this bug
Leann Ogasawara: Here are your requested log files.
Hold this helps somewhat.
** Attachment added: Log files for 2.6.28.6
http://launchpadlibrarian.net/23157695/computer-logs.7z
--
file transfers on USB disk are very slow
https://bugs.launchpad.net/bugs/197762
You received this bug
Bus 001 Device 043: ID 152d:2338 JMicron Technology Corp. / JMicron USA
Technology Corp. JM20337 Hi-Speed USB to SATA PATA Combo Bridge
20mb/s write.
Bus 001 Device 040: ID 1b1c:1a90 (Corsair Voyager GT)
1.5mb/s
Differences in attached lsusb -v (pata vs voyager) seem to be...
iConfiguration
Same problem here.
Corsair Voyager GT 16gb (among the fastest USB sticks around)
Linux hitler 2.6.28.2 #3 SMP Sat Jan 31 14:04:46 CET 2009 x86_64 GNU/Linux
4gb memory
Ubuntu 8.10
pci=routeirq has no effect.
# time mount-dd-umount.sh
20mb takes 7 seconds = 2.8mb/s
30mb takes 6 = 5mb/s
100 takes
