Storage flash using sdwire creates non-fully bootable images

[eballetbo]

This has been tested using a sdwire version 1.4. I attempted to flash an image using the usual command:

j storage flash auto-osbuild-am69sk-autosd9-qa-regular-aarch64-1721379799.69421d99.raw

And resulted in a non-fully bootable images. The image goes to the initramfs recovery prompt instead of the login prompt. The cause of that is the following message:

[    2.063217] JBD2: no valid journal superblock found
[    2.063261] EXT4-fs (mmcblk1p4): Could not load journal inode

I checked the image by flashing using the usual command.

dd if=auto-osbuild-am69sk-autosd9-qa-regular-aarch64-1721379799.69421d99.raw of=/dev/sda bs=4M conv=fsync

And boots as expected.

As discussed with @mangelajo we think that buffered writing is not working properly resulting in a corrupted image flashed.

[mangelajo]

Correct, we need to make the storage writes un-buffered (i.e. like dd oflag=direct ) and/or to make sure we sync buffers out at the end.

[NickCao]

Should be fixed by jumpstarter-dev/jumpstarter#356, reopen if issue persists.