通過以下命令檢視分割槽：

# 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是通過啟動引數傳進去的

setenv bootargs 'mem=32M console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=squashfs mtdparts=hi_sfc:256K(boot),1280K(kernel),2496K(rootfs),4160K(user)'

因為flash一共8M，所以剩餘4160K給user。

mtd的name就是根據這裡來的，可以換做其他名稱。

系統起來以後，通過這個命令 掛載user分割槽到home，jffs2必須是核心支援的

# mount -t jffs2 /dev/mtdblock3 /home
 

 剛開始找不到user分割槽，查詢半天才找到原因：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

 linux的mount支援的檔案系統:
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.

note:man 8 mount

檢視Linux當前支援的檔案系統：cat /proc/filesystems
[[email protected] proc]# cat filesystems
nodev   sysfs
nodev   rootfs
nodev   bdev
nodev   proc
nodev   cpuset
nodev   binfmt_misc
nodev   debugfs
nodev   securityfs
nodev   sockfs
nodev   usbfs
nodev   pipefs
nodev   futexfs
nodev   tmpfs
nodev   inotifyfs
nodev   eventpollfs
nodev   devpts
nodev   ramfs
        iso9660
nodev   mqueue
        ext3
nodev   rpc_pipefs
nodev   autofs
nodev   nfsd
[[email protected] proc]#