1. 查看emmc 的分区信息 ，发现只有mmcblk0boot0 和 mmcblk0boot1，用户是不能用的
#ls /dev/mmcblk0* -lh
brw-rw---- 1 0 0 179, 0 May 1 00:21 /dev/mmcblk0
brw-rw---- 1 0 0 179, 8 May 1 00:21 /dev/mmcblk0boot0
brw-rw---- 1 0 0 179, 16 May 1 00:21 /dev/mmcblk0boot1
还可以使用如下命令查看，发现 没有分区
#fdisk -l
Partition 1 has different physical/logical end:
phys=(486,254,63) logical=(487,29,54)
Disk /dev/mmcblk0: 7464 MB, 7826571264 bytes, 15286272 sectors
238848 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Disk /dev/mmcblk0 doesn't contain a valid partition table
2. 使用fdisk 进行分区, 需要指定起始位置 和终止位置，需要保存
fdisk /dev/mmcblk0
然后使用 mkfs.ext2 /dev/mmcblk0p1
然后查看
#fdisk -l
Partition 1 has different physical/logical end:
phys=(486,254,63) logical=(487,29,54)
Disk /dev/mmcblk0: 7464 MB, 7826571264 bytes, 15286272 sectors
238848 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes
Device Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
/dev/mmcblk0p1 0,1,1 1023,3,16 16 1048591 1048576 512M 83 Linux
[root@Loongson-gz:/]#
3. 查看 分区的文件系统格式
[root@HuoLong-OS ~]# blkid /dev/mmcblk0p1 /dev/mmcblk0p1: UUID="c903f73a-86fc-4a49-9448-35f75823b4c6" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="f05bf4e2-01" [root@HuoLong-OS ~]# [root@HuoLong-OS ~]# lsblk -f /dev/mmcblk0p1 NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT mmcblk0p1 ext4 1.0 c903f73a-86fc-4a49-9448-35f75823b4c6 5.5G 18% / [root@HuoLong-OS ~]# [root@HuoLong-OS ~]# file -s /dev/mmcblk0p1 /dev/mmcblk0p1: Linux rev 1.0 ext4 filesystem data, UUID=c903f73a-86fc-4a49-9448-35f75823b4c6 (needs journal recovery) (extents) (64bit) (large files) (huge files) [root@HuoLong-OS ~]# [root@HuoLong-OS ~]# [root@HuoLong-OS ~]# df -Th Filesystem Type Size Used Avail Use% Mounted on /dev/root ext4 7.1G 1.3G 5.5G 19% / devtmpfs devtmpfs 427M 0 427M 0% /dev tmpfs tmpfs 443M 0 443M 0% /dev/shm tmpfs tmpfs 177M 3.6M 174M 3% /run tmpfs tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs tmpfs 443M 0 443M 0% /tmp [root@HuoLong-OS ~]# [root@HuoLong-OS ~]# mount | grep mmcblk0p1 /dev/mmcblk0p1 on / type ext4 (rw,relatime)
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