On Sat, 2003-02-15 at 13:49, Ged Haywood wrote: > Hi Dan, > > On 15 Feb 2003, Dan Hensley wrote: > > > 1. Attach the CF reader and card to my Linux machine. > > 2. dd if=/dev/sda1 of=file1.dd > > 3. dd if=file1.dd of=/dev/sda1 > > 4. dd if=/dev/sda1 of=file2.dd > > > > Then I compare file1.dd and file2.dd. Both files are a total of 7979008 > > bytes. Of these, 13266 bytes are different between the two files. > [snip] > > What can cause this to happen, and are there any fixes? > > I get (*very approximately) the same sort of thing happening on a usb > ZIP drive. When I use the same drive and same example of 250MByte > disc on one machine (Intel chipset) it's fine, on another (SIS) it's > completely useless. Both are using 2.4.19 kernels. You can see that > many of the modules are identical in size (comforting:), there's a lot > of common code in there. I think the fault is probably in the HCI but > it could be interrupts or something. I have put it on my TODO list to > find out what the problem is, but if you saw my TODO list...
Hmmm, interesting. I didn't think about the chipset. In case it helps, here's my information: 00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 03) 00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40) 00:07.1 IDE interface: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE (rev 06) 00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 16) 00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 16) 00:07.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40) 00:09.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08) 00:09.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 08) 00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) 01:00.0 VGA compatible controller: nVidia Corporation NV15 [GeForce2 GTS] (rev a3) I don't have another Linux machine handy to test this, to see if another chipset would change the results. My old Linux machine is a PPro 200, and I'm not even sure if its USB ports work. I also don't remember what kernel version I have. Thanks, Dan ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
