Re: Probloem mounting mtd with jffs2

Lsreddy,您好！

	you should create jffs2 fs by using:

    eraseall /dev/mtd2
    cp jffs2.img /dev/mtd2

    jffs2.img is the jffs2 fs image file created  by mkfs.jffs2  in host computer. (you should know little-edian or big-edian!)
  
then mount.

======= 2003-10-30 08:03:00 您在来信中写道：=======

>Dear All,
>mounting mtdblock with jffs2 fails says not found magic number for jffs2
>filesystem.Does it mean that i have to create jffs2 fs on mtdblock2, before
>mount.It also syas in some place Old bitmask found at location 0xxxxxx.At
>the end it says faild to mount to mtdblock.Please find the info pasted
>bellow.I use montavista linux corss compilting evironment for arm xscale
>architecture.
>I use mvl 2.4.18 kernel.Please let me know how to mount to the mtd partion.
>thanks,
>regards,
>lsreddy.
>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
># mount -n -t jffs2 /dev/mtdblock3 /mnt/jffs2/
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000:
>0x28cd instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000004:
>0x006e instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010:
>0x436f instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000014:
>0x7265 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000018:
>0x6564 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000001c:
>0x4f4d instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000020:
>0x5a4e instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000030:
>0x436f instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000034:
>0x7265 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000038:
>0x6564 instead
>Further such events for this erase block will not be printed
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020000:
>0xae8e instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020004:
>0xefae instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020008:
>0x8edc instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0002000c:
>0xa4c7 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020010:
>0x1eab instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020014:
>0xf5ca instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020018:
>0xbfc5 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0002001c:
>0xff12 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020020:
>0x53ca instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00020024:
>0x5d9a instead
>Further such events for this erase block will not be printed
>Old JFFS2 bitmask found at 0x00026920
>You cannot use older JFFS2 filesystems with newer kernels
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00040000:
>0x9ee8 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00040004:
>0x2b7b instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00040008:
>0x7cc8 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0004000c:
>0x5c36 instead
>---
>---
>---jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0000:
>0x26bf instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0004:
>0xbf51 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0008:
>0x4f7b instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e000c:
>0x1286 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0010:
>0xf64c instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0014:
>0xc911 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0018:
>0x166c instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e001c:
>0x9ac5 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0020:
>0x3368 instead
>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006e0024:
>0x5d60 instead
>Further such events for this erase block will not be printed
>Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
>empty_blocks 0, bad_blocks 0, c->nr_blocks 56
>mount: Mounting /dev/mtdblock2 on /mnt/jffs2 failed: Invalid argument
>
>
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= = = = = = = = = = = = = = = = = = = =
			

　　　　　　　　致
礼！
 


2003-10-31




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