Goung, While running mkdosfs passing the number of blocks as an argument should solve your problem. The number of blocks can be obtained by running the fdisk command (4th column). The sample output of fdisk command when run on hda is shown below.
[EMAIL PROTECTED]:~# fdisk /dev/hda The number of cylinders for this disk is set to 4864. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) Command (m for help): p Disk /dev/hda: 40.0 GB, 40007761920 bytes 255 heads, 63 sectors/track, 4864 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 1 4377 35158221 83 Linux /dev/hda2 4378 4864 3911827+ c W95 FAT32 (LBA) Regards, Sudhakar ________________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Goung Sent: Thursday, May 22, 2008 11:59 AM To: davinci-linux-open-source@linux.davincidsp.com Subject: Error in formating SDHC 8G card in DM6446?? Hi, I am using Linux version 2.6.10_mvl401-davinci_evm and already using patch 045 from TI. It work fine in 2G SD card whit FAT32 or other file systems, but when i format SDHC 8G using FAT 32, it gets some troubles: The size is wrong , the message as follow: # ./mkdosfs -F 32 /dev/mmcblk0 mkdosfs 2.11 (12 Mar 2005) # df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/mmcblk0 1022 0 1022 0% /mnt/sd And then i test read/write operation in /mnt/sd, it encounter the follow messages: #cp /mnt/sd/test.img /mnt/sd/test1.img (test.img size is 10MB) cp: Read error: Input/output error But when i using format in desktop (fedora core 6 in desktop) by usb card reader, the size is correct. #./mkdosfs -F 32 /dev/sda1 # df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/mmcblk0 7807 0 7807 0% /mnt/sd and then i test read/write operation in /mnt/sd, everything is ok. I guess it may be wrong in MBR when format, but i don't know how to fix this problem. Any help will be very appreciated Thanks very much for your answer. ----------------------------------------------------- test log -------------------------------------------------- ---using ext2 in 8G SDHC card -------- #lsmod Module Size Used by Tainted: PF sdio_memory_fd 28032 0 - Live 0xbf03c000 sdio_davinci_hcd 27388 0 - Live 0xbf034000 sdio_busdriver 88528 2 sdio_memory_fd,sdio_davinci_hcd, Live 0xbf01d000 sdio_lib 11232 3 sdio_memory_fd,sdio_davinci_hcd,sdio_busdriver, Live 0xbf019000 dsplinkk 68632 0 - Live 0xbf007000 cmemk 12476 0 - Live 0xbf002000 dspon 1376 0 - Live 0xbf000000 #mkfs.ext2 /dev/mmcblk0p1 Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 1001920 inodes, 2002092 blocks 100104 blocks (5.00%) reserved for the super user First data block=0 62 block groups 32768 blocks per group, 32768 fragments per group 16160 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Writing inode tables: 0/62 1/62 2/62 3/62 4/62 5/62 6/62 7/62 8/62 9/6210/6211/6212/6213/6214/6215/6216/6217/6218/6219/6220/6221/6222/6223/6224/6225/6226/6227/6228/6229/6230/6231/6232/6233/6234/6235/6236/6237/6238/6239/6240/6241/6242/6243/6244/6245/6246/6247/6248/6249/6250/6251/6252/6253/6254/6255/6256/6257/6258/6259/6260/6261/62done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 24 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. #mount /dev/mmcblk0p1 /mnt/sd #mount |grep sd /dev/mmcblk0p1 on /mnt/sd type ext2 (rw,nogrpid) #df -m | grep sd /dev/mmcblk0p1 7698 0 7307 0% /mnt/sd #cp /tmp/ftp_temp/test.img /mnt/sd #cp /mnt/sd/test.img /mnt/sd/test2.img #df -m | grep sd /dev/mmcblk0p1 7698 36 7271 0% /mnt/sd Everythings is ok . ---------------------------------------using FAT32 in 8G SDHC card -------------------------------------- #./mkdosfs -F32 /dev/mmcblk0p1 mkdosfs 2.11 (12 Mar 2005) #mount /dev/mmcblk0p1 /mnt/sd #mount | grep sd /dev/mmcblk0p1 on /mnt/sd type vfat (rw,nodiratime,fmask=0033,dmask=0033) #df -m |grep sd /dev/mmcblk0p1 1022 0 1022 0% /mnt/sd #cp /tmp/ftp_temp/test.img /mnt/sd #cp /mnt/sd/test.img /mnt/sd/tes2.img The size of mount in sd folder is wrong with 1022 (0.99G). -- Best Regards, Goung. _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
