[轉載] http://blog.csdn.net/xdshengk/article/details/46926489
通過以下命令查看分區：
- # cat /proc/partitions
- major minor #blocks name
- 31 0 256 mtdblock0
- 31 1 1280 mtdblock1
- 31 2 2496 mtdblock2
- 31 3 4160 mtdblock3
- 240 0 256 romblock0
- 240 1 1280 romblock1
- 240 2 2496 romblock2
- 240 3 4160 romblock3
- # cat /proc/mtd
- dev: size erasesize name
- mtd0: 00040000 00010000 "boot"
- mtd1: 00140000 00010000 "kernel"
- mtd2: 00270000 00010000 "rootfs"
- mtd3: 00410000 00010000 "user"
可以看到，mtdblockx對應mtdx，name是通過啓動參數傳進去的。
- setenv bootargs 'mem=32M console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=squashfs mtdparts=hi_sfc:256K(boot),1280K(kernel),2496K(ro
- otfs),4160K(user)'
因爲flash一共8M，所以剩餘4160K給user。
mtd的name就是根據這裏來的，可以換做其他名稱。
系統起來以後，通過這個命令 掛載user分區到home，jffs2必須是內核支持的
- # mount -t jffs2 /dev/mtdblock3 /home
剛開始找不到user分區，查找半天才找到原因：是user 大小搞成4190K了，flash是8M的，超過了最大值
這個是識別出user的：
SPI FLASH start_up_mode is 3 Bytes
Spi(cs1):
Block:64KB
Chip:8MB
Name:"W25Q64FV"
spi size: 8MB
chip num: 1
4 cmdlinepart partitions found on MTD device hi_sfc
Creating 4 MTD partitions on "hi_sfc":
0x000000000000-0x000000040000 : "boot"
0x000000040000-0x000000180000 : "kernel"
0x000000180000-0x0000003f0000 : "rootfs"
0x0000003f0000-0x000000800000 : "user"
Fixed MDIO Bus: probed
這個沒有識別user
Block:64KB
Chip:8MB
Name:"W25Q64FV"
spi size: 8MB
chip num: 1
mtd: hi_sfc: partitioning exceeds flash size, truncating
3 cmdlinepart partitions found on MTD device hi_sfc
Creating 3 MTD partitions on "hi_sfc":
0x000000000000-0x000000040000 : "boot"
0x000000040000-0x000000180000 : "kernel"
0x000000180000-0x0000003f0000 : "rootfs"
Fixed MDIO Bus: probed
himii: probed
以下轉載自 http://blog.chinaunix.net/uid-23835539-id-401937.html
Linux的mount支持的文件系統:
adfs, affs, autofs, cifs, coda, coherent,
cramfs, debugfs, devpts, efs, ext, ext2, ext3, hfs, hpfs, iso9660, jfs, minix, msdos,
ncpfs, nfs, nfs4, ntfs, proc, qnx4, ramfs, reiserfs, romfs, smbfs, sysv, tmpfs, udf, ufs,
umsdos, usbfs, vfat, xenix, xfs, xiafs.