I use DiskOnChip as backing media, and also mount it on /truefs/,As you say it is better to mount it later. Is it ok to read/write on /truefs while at the same time r/w throught windows platform?
It seems that while add or delete the file on the smartphone, this change can't reflect on windows platform's view, I could only see that changes after rmmod/insmod the g_file_storage, Is this normal? Why can't the change reflect real time?
It seems fat16 filesystem has filename limited 8 character, is it proper to use fat16 or fat32 on UFI device?
thanks for commenting my doubts.
write-protect.From: Alan Stern <[EMAIL PROTECTED]> To: tong changda <[EMAIL PROTECTED]> CC: linux-usb-devel@lists.sourceforge.net Subject: Re: [linux-usb-devel] how to format backup media for mass-storage Date: Fri, 18 Feb 2005 22:30:32 -0500 (EST)
On Sat, 19 Feb 2005, tong changda wrote:
> Doc is Disk on Chip
> Following your advice I run fdisk on my smartphone(pxa271)'s DOC to
> make a partition, then using mkdosfs on this partition(mkdosfs -F 16
> /dev/tffsa1), Now there is a disk driver appear, but it is
> But I could mount as vfat to read/write file on it.and
> There remains several problems(insmod g_file_storage.o file=/dev/tffsa)
> 1) it is write-protect, printk shows open_backing_file set ro=1 as
> checking IS_RDONLY(inode) is true, Is it because of ill use of fdisk
by> mkdosfs?
No, your use of fdisk and mkdosfs is correct. Did you check the permissions on /dev/tffsa (ls -l /dev/tffsa)? Maybe you don't have write permission.
Did you have it mounted when you loaded g-file-storage? That might cause a problem.
> 2) I can't see the file on the disk file. But I could see the files
> mount it on /truefs/, and could r/w file on it. Is the problem of > mkdosfs(v2.8)? or there is some issue with pxa271 driver.
I don't think there's any problem with mkdosfs. Maybe there is an issue with the pxa271 driver. Do you see any error messages in the dmesg log? Have you tried turning on debugging in the g-file-storage driver? (Change the line that says "#undef DEBUG" to "#define DEBUG".)
Alan Stern
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