I.MX6 32G SD卡测试

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 *                       I.MX6 32G SD卡测试

 * 说明：

 *     这是刘涛测试32G卡的情况。

 *

 *                                    2016-10-17 深圳 南山平山村 曾剑锋

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一、参考文档：

    [solved] couldn't mount because of unsupported optional

        https://forums.gentoo.org/viewtopic-p-7259024.html

二、32G SD卡挂载情况测试：

    . fat

        ok

    . ext2

        ok

    . ext3

        root@freescale ~$ mount -t ext3 /dev/mmcblk1p1

        root@freescale ~$ mount /dev/mmcblk1p1 /mnt/mount/

        root@freescale ~$ mount -t ext3 /dev/mmcblk1p1 /mnt/mount/

        EXT3-fs: barriers not enabled

        kjournald starting.  Commit interval  seconds

        EXT3-fs (mmcblk1p1): using internal journal

        EXT3-fs (mmcblk1p1): mounted filesystem with writeback data mode

    . ext4

        root@freescale ~$ mount /dev/mmcblk1p1 /mnt/mount/

        EXT3-fs (mmcblk1p1): error: couldn't mount because of unsupported optional features (240)

        EXT2-fs (mmcblk1p1): error: couldn't mount because of unsupported optional features (240)

        EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts: (null)