学步园

（1）查看MTD分区表


[cpp]
view plaincopyprint?

1. U-Boot$ mtdparts  
2. mtdparts variable not set, see 'help mtdparts'  
3. no partitions defined  
4.   
5. defaults:  
6. mtdids : nand0=nandflash0  
7. mtdparts: mtdparts=nandflash0:1536k(bootloder),512k(params),4m(kernel),16m(safefs),-(rootfs)  

U-Boot$ mtdparts<br /> mtdparts variable not set, see 'help mtdparts'<br /> no partitions defined</p> <p>defaults:<br /> mtdids : nand0=nandflash0<br /> mtdparts: mtdparts=nandflash0:1536k(bootloder),512k(params),4m(kernel),16m(safefs),-(rootfs)<br />

（2）载入默认分区表

 U-Boot$ mtdparts default

（3）激活分区

U-Boot$ ubi part safefs

Creating 1 MTD partitions on "nand0":<br /> 0x000000600000-0x000001600000 : "mtd=3"<br /> device_name0:mtd=3<br /> UBI: attaching mtd1 to ubi0<br /> UBI: physical eraseblock size: 131072 bytes (128 KiB)<br /> UBI: logical eraseblock size: 129024 bytes<br /> UBI: smallest flash I/O unit: 2048<br /> UBI: sub-page size: 512<br /> UBI: VID header offset: 512 (aligned 512)<br /> UBI: data offset: 2048<br /> scanning error 0<br /> UBI: attached mtd1 to ubi0<br /> UBI: MTD device name: "mtd=3"<br /> UBI: MTD device size: 16 MiB<br /> UBI: number of good PEBs: 127<br /> UBI: number of bad PEBs: 1<br /> UBI: max. allowed volumes: 128<br /> UBI: wear-leveling threshold: 4096<br /> UBI: number of internal volumes: 1<br /> UBI: number of user volumes: 1<br /> UBI: available PEBs: 0<br /> UBI: total number of reserved PEBs: 127<br /> UBI: number of PEBs reserved for bad PEB handling: 2<br /> UBI: max/mean erase counter: 4/1<br />   

查看当前激活的分区：
U-Boot$ ubi part


Device 0: nand0, partition safefs

（4）挂载分区

U-Boot$ ubifsmount safefs

UBIFS: recovery needed<br /> UBIFS: recovery deferred<br /> UBIFS: mounted UBI device 0, volume 0, name "safefs"<br /> UBIFS: mounted read-only<br /> UBIFS: file system size: 14192640 bytes (13860 KiB, 13 MiB, 110 LEBs)<br /> UBIFS: journal size: 9033728 bytes (8822 KiB, 8 MiB, 71 LEBs)<br /> UBIFS: media format: w4/r0 (latest is w4/r0)<br /> UBIFS: default compressor: LZO<br /> UBIFS: reserved for root: 0 bytes (0 KiB)

（5）查看分区的内容

U-Boot$ ubifsls

<DIR> 3840 Tue Apr 20 07:42:09 2010 bin<br /> <DIR> 480 Fri Aug 28 02:32:54 2009 dev<br /> <DIR> 2416 Thu Jan 01 00:18:47 1970 etc<br /> <DIR> 5464 Tue Apr 20 07:54:28 2010 lib<br /> <DIR> 480 Tue Apr 20 07:42:01 2010 mnt<br /> <DIR> 160 Fri Aug 28 01:37:57 2009 opt<br /> <DIR> 224 Tue Apr 20 09:19:29 2010 tmp<br /> <DIR> 160 Fri Aug 28 01:37:57 2009 sys<br /> <DIR> 736 Thu Feb 26 07:25:19 2009 var<br /> <DIR> 608 Fri Aug 28 02:32:54 2009 usr<br /> <DIR> 296 Fri Aug 28 01:37:57 2009 boot<br /> <DIR> 224 Tue Apr 20 07:42:01 2010 home<br /> <DIR> 160 Fri Aug 28 01:37:57 2009 proc<br /> <DIR> 2528 Tue Sep 14 08:50:07 2010 sbin<br /> <DIR> 160 Fri Aug 28 01:37:57 2009 root<br /> <LNK> 11 Tue Sep 14 08:24:07 2010 linuxrc<br /> 706 Wed Sep 15 08:47:30 2010 burn.usb<br /> 52 Wed Jun 30 06:30:21 2010 readme<br /> 697 Wed Sep 15 08:47:43 2010 burn.cf<br /> 664 Wed Sep 15 08:47:17 2010 burn.sd

（6）查看某个文件

U-Boot$ ubifsload 80008000 readme

Loading file 'readme' to addr 0x80008000 with size 52 (0x00000034)...<br /> Done

U-Boot$ md 80008000