Windows needs to see a partition table (or "Master Boot Record") on the device; that is, it wants to tsee the entire raw disk image. Linux needs to see just the partition that contains the file system.
If you format the partition on Windows, you may then use the loop device to mount it on linux with "losetup -o 512 myfile /dev/loop0". If you want to format it on linux, you need to write an MBR on the first block so that Windows will like it. Mkdosfs will create a filesystem in a regular file, but it will not write an MBR. Fdisk writes the MBR, but it will not act on a file, only on a block device. Kent Forschmiedt Wildseed, Ltd. http://www.wildseed.com -----Original Message----- From: Vladimir Trukhin [mailto:[EMAIL PROTECTED] Sent: Thursday, January 06, 2005 9:29 PM To: Alan Stern Cc: linux-usb-devel@lists.sourceforge.net Subject: Re: [linux-usb-devel] g_file_storage and Windows - problem in connection on pxa255 Hi Alan, Thanks for your fast reply! Alan Stern wrote: >On Thu, 6 Jan 2005, Vladimir Trukhin wrote: > > >>Due to mkdosfs does not work with USB directly (it failed with " unable >>to get drive geometry for '/dev/uba1' "), >> >> > >It probably would have worked better if you had used usb-storage instead >of ub. > > > I switched to kernel 2.4.26 on my PC (Slackware 10) and tryed to use usb-storage module. But fdisk told me " Unable to read /dev/sda ". At the same time /proc/bus/usb/devices shows that device is connected: ------------------------------------ T: Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 6 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1 P: Vendor=0525 ProdID=a4a5 Rev= 3.03 S: Manufacturer=Linux 2.6.10-pxa255-ez-x5 with pxa2xx_u S: Product=File-backed Storage Gadget S: SerialNumber=3238204A756C C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms ------------------------------------ That's rather strange cause it works fine with an ordinary Flash Memory Card in the same USB socket. Also, if I use kernel 2.6.9 on my PC and ub driver instead of usb-storage the board works properly. >>........ >>udc: USB reset >>udc: USB reset >>g_file_storage gadget: full speed config #1 >>udc: USB reset >>udc: USB reset >>g_file_storage gadget: full speed config #1 >>... and so on. >> >> > >That looks normal. > > > <>Everything in your log looked normal. And it should only have taken > a few > seconds. What happened during the remainder of the 3-5 minutes of > waiting? Well, I found one thing which is probably important. If I specify 'removable' parameter for g_file_storage module my WinXP eventually connects to the board after about 2...3 minutes of resetting. But if not, it never connects. And Windows stops to reset approximately in 5 minutes. In both cases it shows that USB Mass Storage Device is working properly in the Device Manager. Also, in the first case (after successful connection) I can see that Storage Volume->Generic Volume appears in the Device Manager in 2 or 3 minutes since plugin (and about 20 resets with 5...20 sec timeouts between them). I tryed to connect the board to the another PCs (WinXP and Win2k). The result was the same. But for Linux host it doesn't matter whether or not I use 'removable' option. The Storage Gadget works properly in both cases. Best regards, Vlad Trukhin PS: I'm sory for double posting my first message. Actually, this was the first time I'd tryed to communicate through a such message list. ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
