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I am working on i.MX 6Quad SABRE-SD with Android 9. I am facing some problem when copy the some data to system/app from USB Mass Storage,

I got error, when I mount the system to write access:

sabresd_6dq:/ # **mount -o remount,rw '/system'**

**EXT4-fs (dm-0): previous I/O error to superblock detected
Buffer I/O error on dev dm-0, logical block 0, lost sync page write
EXT4-fs (dm-0): re-mounted. Opts: block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8**

And also I got error when copy the some data to system/app from USB Mass Storage.

sabresd_6dq:/system/app # cp /mnt/media_rw/2A61-DD07/ota/update.zip  /system/app

EXT4-fs error (device dm-0): ext4_mb_generate_buddy:757: group 11, block bitmap and bg descriptor inconsistent: 32768 vs 0 free clusters

EXT4-fs (dm-0): previous I/O error to superblock detected

Buffer I/O error on dev dm-0, logical block 0, lost async page write

Buffer I/O error on dev dm-0, logical block 1, lost async page write
  • Why are you using device-mapper with /system? dm-crypt? dm-verity? Or something else? – Irfan Latif Oct 3 '19 at 11:36
  • Is there any possible to disable dm-crypt and dm-verity? – VKS Oct 3 '19 at 12:11
  • Disabling is the next step. I don't know what and why are you using. I'm asking you. From where did you get system.img and kernel? – Irfan Latif Oct 3 '19 at 12:44
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Configuration to unmount the system,

1, adb shell

2, reboot bootloader

3, fastboot oem unlock

Reboot the devices,

4, adb root

5, adb disable-verity

6, adb root

7, adb reboot

8, adb root

8q, adb remount

9, adb push adb push 'D:\VINOTH\' /system/app/

Wait until finish

10, adb reboot

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