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Linux SD card error -84

Former Member
Hi all,
I have done the tutorial to boot Linux from the SD card. I can boot it without any problem. I can mount the SD card and read everything in the SD card without problem. But if i try to create a new file on the SD card and do the command "sync" or "umount", it fail and i get 
mmcblk0: error -84 transferring data, sector 47744, nr 2, cmd response 0x900, card status 0xc00 end_request: I/O error, dev mmcblk0, sector 47744 mmcblk0: error -84 transferring data, sector 16384, nr 2, cmd response 0x900, card status 0xc00 end_request: I/O error, dev mmcblk0, sector 16384 Buffer I/O error on device mmcblk0p1, logical block 8192 lost page write due to I/O error on mmcblk0p1 end_request: I/O error, dev mmcblk0, sector 16385 Buffer I/O error on device mmcblk0p1, logical block 8193 lost page write due to I/O error on mmcblk0p1 mmcblk0: error -84 transferring data, sector 15439, nr 1, cmd response 0x900, card status 0x0 end_request: I/O error, dev mmcblk0, sector 15439 Buffer I/O error on device mmcblk0p1, logical block 7247 lost page write due to I/O error on mmcblk0p1 mmcblk0: error -84 transferring data, sector 14491, nr 1, cmd response 0x900, card status 0x0 end_request: I/O error, dev mmcblk0, sector 14491 Buffer I/O error on device mmcblk0p1, logical block 6299 lost page write due to I/O error on mmcblk0p1 mmcblk0: error -84 transferring data, sector 8193, nr 1, cmd response 0x900, card status 0x0 end_request: I/O error, dev mmcblk0, sector 8193 Buffer I/O error on device mmcblk0p1, logical block 1 lost page write due to I/O error on mmcblk0p1
Most time, what i have done disappears
I already check the "Write Protected". It's not a problem. I check with an other SD card, and i get the same issue.
Does any one have an idea?
I format the SD card in FAT32 with 32 ko allocation unit 
  • 0

    I'm guessing that you are using an SD card with both a BOOT partition and a rootfs partition.

    Normally BOOT is FAT32 so that the bootrom can read it.  Then rootfs is ext4.  You say that your partition is FAT32. Shouldn't it be ext4?

  • 0 in reply to 100padudle

    Hi,

    No, i have just one FAT32 partition.

    I tried what you tell, create two partition, one for the boot in FAT32 and one in ext4 for data

    This is what i get from the fdisk command

    Command (m for help): p

    Disk sdb: 3980 MB, 3980394496 bytes
    255 heads, 63 sectors/track, 483 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x7c70a044

    Device Boot      Start         End      Blocks   Id  System
      sdb1   *           1          65      522081    b  W95 FAT32
      sdb2              66         483     3357585   83  Linux


    I tried it and get exactly the same error.
    I also tried to mount the boot partition with the command

    $ mount -t vfat

    This also failed with the same error.

    I was wondering if change the Linux from 14.2 to 14.3 can't resolve the issue (driver issue?)

  • 0 in reply to 100padudle

    Hi,

    I just move to Linux 14.3. And i still have the same error.

    mmcblk0: error -84 transferring data, sector 15783, nr 2, cmd response 0x900, card status 0xc00
    end_request: I/O error, dev mmcblk0, sector 15784
    mmcblk0: error -84 transferring data, sector 15231, nr 2, cmd response 0x900, card status 0xc00
    end_request: I/O error, dev mmcblk0, sector 15232
    Buffer I/O error on device mmcblk0p1, logical block 15169
    lost page write due to I/O error on mmcblk0p1
    mmcblk0: error -84 transferring data, sector 7663, nr 1, cmd response 0x900, card status 0x0
    mmcblk0: error -84 transferring data, sector 95, nr 1, cmd response 0x900, card status 0x0
    mmcblk0: error -84 transferring data, sector 64, nr 1, cmd response 0x900, card status 0x0