i.MX Processors中的主题 Re: mounting a root file system

mounting a root file system

SANJEEV1z — Wed, 19 Dec 2012 10:08:20 GMT

hi,

we brought new i.MX6q SABRELITE board,

anybody has document about "how to mount a root file system. "

if so, please share

regards

sanjeev

Re: mounting a root file system

daiane_angolini — Wed, 19 Dec 2012 12:25:51 GMT

You will copy any "rootfs" to the SDCard, and then you will set the kernel command line (the default one will mount the rootfs)

Please, let me know what commands/steps you already made

Re: mounting a root file system

SANJEEV1z — Thu, 20 Dec 2012 06:01:52 GMT

hi daiane,

i want to mount roof file system through nfs

regards

sanjeev

Re: mounting a root file system

qiang_li-mpu_se — Thu, 20 Dec 2012 07:35:23 GMT

You can reference to the attached Linux BSP user guider.

Re: mounting a root file system

SANJEEV1z — Thu, 20 Dec 2012 08:34:19 GMT

please send me Linux BSP user guider

Re: mounting a root file system

ajaypatel — Thu, 20 Dec 2012 11:17:55 GMT

For i.MX6q SABRELITE board, root file system is in form of ramdisk image which is a part of the boot.img. boot.img is loaded on first partition of SD card which will not mount directly.

If you want to mount the root file system to access it, you have to follow these steps :

1. Get the urmadisk.img file. You can find this file from Android source code or from the prebuilt image set of the i.mx6q SABRELITE.
2. Unpack urmadisk.img using following command :

dd if=uramdisk.img of=ramdisk bs=64 skip=1

3. Now extract it : zcat ramdisk >my_ramdisk
4. Mkdir rootfs
5. Cd rootfs
6. cpio -id < ../ my_ramdisk
7. After above steps you can find root filesystem files in rootfs folder.
8. After any modification in filesystem, you can repack the rootfs using following commands:

find ./ | cpio -H newc -o > ../newramdisk

cd ..

gzip newramdisk

9. You can use mkimage command to create new uramdisk.img :

mkimage -A arm -T newramdisk -C none -n newramdisk -d newramdisk.gz newuramdisk.img

Thanks,

Ajay-

Re: mounting a root file system

daiane_angolini — Thu, 20 Dec 2012 15:36:57 GMT

SANJEEV1z follow the User Guide that Qiang Li had included in his reply.

Start from step 1

When you face problems, please, let us know. Post the log and which step you´re trying.

When you have finished the User Guide, you will be able to choose from where you will boot, and you will understand what you´re doing.

baby-steps, ok?

Re: mounting a root file system

SANJEEV1z — Mon, 24 Dec 2012 05:54:15 GMT

thanks daiane

Re: mounting a root file system

daiane_angolini — Tue, 25 Dec 2012 20:23:55 GMT

Please, keep us updated

Re: mounting a root file system

SANJEEV1z — Wed, 26 Dec 2012 12:02:06 GMT

hi daiane,

about mounting root file system, from the below link, i got BSP

i simply put rfs file(got from the link), into server machine

and i executed the commands as in PDF section 3.3.

and i mounted file system:)

thanks and regards

sanjeev