AM5728: Android filesystem issue with Fstab

weijie.li

Part Number: AM5728

I use android file system; modify fstab found when fstab.am57xevmbaord do SD inside, the front will be automatically added "#",I added the node will be annotated.

The fstab.am57xevmboard information in the SD card is as follows:

#/dev/block/platform/44000000.ocp/480b4000.mmc/by-name/system  /system  ext4 ro   wait
#/dev/block/platform/44000000.ocp/480b4000.mmc/by-name/cache  /cache  ext4 noatime,nosuid,nodev wait,check
#/dev/block/platform/44000000.ocp/480b4000.mmc/by-name/userdata  /data  ext4 noatime,nosuid,nodev wait,check
#/dev/block/platform/44000000.ocp/480b4000.mmc/by-name/recovery  /recovery emmc defaults  defaults

/devices/platform/44000000.ocp/488c0000.omap_dwc3_2/488d0000.usb* auto auto defaults voldmanaged=usb0:auto
/devices/platform/44000000.ocp/48880000.omap_dwc3_1/48890000.usb* auto auto defaults voldmanaged=usb1:auto
/devices/platform/44000000.ocp/4809c000.mmc/mmc_host* auto auto defaults voldmanaged=sdcard1:auto

please tell me how to modify fstab.

Thanks

over 7 years ago

0 Nick Saulnier over 7 years ago

TI__Guru** 101750 points

Hello Weijie,

1) I want to make sure I understand what your problem is and what you want to do. Could please restate your problem?

Regards,
Nick

0 Praneeth Bajjuri over 7 years ago

TI__Expert 6346 points

Current Release details at

http://software-dl.ti.com/processor-sdk-android/esd/docs/latest/android/Overview.html#processor-sdk-android-building-the-sdk

What is the Release version you are trying to use? We dont support SD card boot on current Android Versions SDKs

Updating and Rebuilding Android instructions are in the URL mentioned above

0 weijie.li over 7 years ago in reply to Praneeth Bajjuri

Intellectual 710 points

Hi

my used SDK version is ti-processor-sdk-android-am57xx-evm-04.00.00.04.

Thanks

0 weijie.li over 7 years ago in reply to Nick Saulnier

Intellectual 710 points

Hi Nick

My problem is that I can't modify fstab and make it valid.And i want to modify fstab and add my own partition.

Thanks

0 Praneeth Bajjuri over 7 years ago in reply to weijie.li

TI__Expert 6346 points

1. Have you formatted your SD card with correct rootfs permissions?

2. Some useful tips on editing SDcard/fstab at

http://omapedia.org/wiki/6AM_SD_card_boot#Hack_change_for_SD_card_support_in_Android

0 Nick Saulnier over 7 years ago in reply to weijie.li

TI__Guru** 101750 points

Additional notes from Praneeth's post:

That wiki link specifically provides instructions for adding SD card support, so it will only apply to SDK 4.0 and 4.1 - From Android SDK 4.2 onward, android must not boot from removable storage.

In order to make changes to fstab:
1) you could rebuild the Android filesystem.
a) use the repo sync tool to download the sources (as detailed in Praneeth's first link)
b) make the changes that you want to make (in your case, to fstab.am57xevmboard)
c) build the filesystem

2) Depending on the directory/file permissions, you may be able to use adb to modify files and test them without rebuilding the entire filesystem. In that process, you would use adb to pull the file to your local machine, make the changes, push the file back to the board, sync, and reboot the board.

Regards,
Nick

0 Praneeth Bajjuri over 7 years ago in reply to weijie.li

TI__Expert 6346 points

Weije,

Assuming the above answers your question.

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AM5728: Android filesystem issue with Fstab