Hi, > On Thu, 28 Apr 2005, Hendrik Muhs wrote: > > > > It looks like you're suffering from the "GO_SLOW" problem the PL-3507 has > > > when running at high speed. This has been fixed in 2.6.12-rc3. Try > > > running the latest kernel and see if it works any better. > > > > I have tested 2.6.12-rc3 and it is not better. As I said in my previous mails > > the problem seems to be more generic. I also have problems with the oxford > > 922 chipset and firewire (maybe a problem with the SCSI subsystem or some > > mainboard chipset specific issue???). > > > > So, it seems that I have to try to find the kernel version, after it breaks. > > If I remember right it does not work with 2.6.8, so probably I will start > > with 2.6.7. > > > > So hopefully I can make a better error report on this.
I now found out a little bit more in this issue: I tried down to Kernel 2.6.6 without luck, also 2.4.30 does not give me better results. At least I found out why a live linux (Knoppix) had better results: Simply the mount option sync was the cause, without sync I get 3-4 MB/s which is still to slow, but at least much faster than before. > > It would help to know exactly what's happening. Are the writes really > slow, or are the transfers constantly interrupted by errors and the need > to reset the drive? Yes, constantly interrupted ist the right description. Interesting is, that with sync, the interrupts are more often, without sync one "write period" is longer, but the pause seems also be longer. I can watch this process with the LED of the drive, it copies for 1-2s, then stops for 0.5s than writes again (I am still copying one big file). > > For a better error report, turn on USB Mass Storage verbose debugging in > the kernel configuration. I could not see any error messages with USB Mass Storage turned on. As I have said, I have got this problem with FireWire, too. Also no other drive errors are reported, everything seems ok. If you have any other ideas where I can put debugging stuff in, please tell me. Hendrik Muhs ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
