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 write-protect. But I could mount as vfat to read/write file on it.
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 and mkdosfs?
2) I can't see the file on the disk file. But I could see the files by 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 tried hard without any success Thanks
fat32From: 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 10:13:45 -0500 (EST)
On Fri, 18 Feb 2005, tong changda wrote:
> Hi,
> Build Mass-storage based on pxa271, Now I want to format DOC as
on> filesystem.
What is DOC?
> First I run fdisk on Mobile on /dev/tffsa ,
What is Mobile?
> add a new partition,
> change filesystem type as 0xb(fat32) then write, Now I could mount vfat
media?> mobile
How could you mount a vfat filesystem without creating one (mkdosfs) first?
> and read/write file on it, but connect with windows , No disk drive > appear. The only way to appear a disk driver is first mkdosfs -F 32 > /dev/tffsa, then fdisk it.
No. If you use fdisk, it must be done before using mkdosfs.
> But choose the disk driver indicate that it need > to be format,
That's because you ran fdisk _after_ mkdosfs instead of _before_.
> But format result in "Disk is write-protect".
> What is the requirement of the dos image to work as mass-storage
The requirement is that the media not be write-protected.
> What is the correct way to format it? Do I need mkdosfs?
Yes. Use fdisk to create one partition, then use mkdosfs to format that partition.
Alan Stern
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