Error creating FAT32 over Nand flash

[Ivan Li]

Some progress for it: I found the sector number mentioned in error message resides in BAD block.
Is there any fix for that?

----- Original Message ----- 
From: "Ivan Li" <lijinlei1 at 163.com>
To: <linux-mtd at lists.infradead.org>
Sent: Tuesday, August 25, 2009 9:35 PM
Subject: Error creating FAT32 over Nand flash


> Hi guys,
> 
> I have some problems with creating FAT32 fs over nand flash.
> I created FAT32 fs over nand flash with below command:
>> flash_eraseall /dev/mtdblock6
>> mkdosfs -v -F 32 /dev/mtdblock6
> mkdosfs 3.0.2 (28 Feb 2009)
> unable to get drive geometry, using default 255/63
> /dev/mtdblock6 has 255 heads and 63 sectors per track,
> logical sector size is 512,
> using 0xf8 media descriptor, with 638976 sectors;
> file system has 2 32-bit FATs and 8 sectors per cluster.
> FAT size is 623 sectors, and provides 79712 clusters.
> 
> with USB mass storage gadget I exported this FAT partition to WinXP. When I tried to copy some files into it, I got errors both on WinXP and Linux console:
> In WinXP I got an error dialog, say "Can't copy ****, data error (CRC error).
> In serial console I got:
> end_request: I/O error, dev mtdblock6, sector 77584
> end_request: I/O error, dev mtdblock6, sector 77568
> Buffer I/O error on device mtdblock6, logical block 9696
> lost page write due to I/O error on mtdblock6
> end_request: I/O error, dev mtdblock6, sector 77576
> Buffer I/O error on device mtdblock6, logical block 9697
> lost page write due to I/O error on mtdblock6
> 
> I don't know if FAT32 can't handle bad blocks correctly, or something else.
> Any ideas?
> 
> The Nand Flash I am using is Samsung K9F4G08U0A, (512M = 4096 blocks, 1 block = 64 pages, 1 page = 2048 bytes, spare area = 64 bytes.)
> 
> Kernel configuration: 
> CONFIG_BLOCK, CONFIG_MTD, CONFIG_MTD_PARTITIONS, CONFIG_MTD_CHAR, CONFIG_MTD_BLKDEVS, CONFIG_MTD_BLOCK, CONFIG_MTD_NAND...
> 
> Thanks in advance.
> 
> Ivan
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