ORDER #3185 one eMMC came broken

tstyopin

Hello!
I recently received my order (two LePotato with heatsinks and two eMMC 64Gb), carefully checked the integrity of the packaging, everything was excellent. But one card came defective, in dmesg and kern.log I see many errors in  like:

Jul 23 17:30:38 potato2 kernel: [ 3134.368488] BTRFS warning (device mmcblk0p2): csum failed root 259 ino 197449 off 5089218560 csum 0x98f94189 expected csum 0xed5c13ff mirror 1

Jul 23 17:41:44 potato2 kernel: [ 3800.829204] BTRFS warning (device mmcblk0p2): csum failed root 259 ino 186743 off 4955455488 csum 0x659258d6 expected csum 0xe4887b4b mirror 1

What is the procedure for exchanging a defective part?

tstyopin

Also, defective part is smaller:

Disk /dev/mmcblk0: 58.3 GiB, 62545461248 bytes, 122159104 sectors

good part:

Disk /dev/mmcblk0: 59.2 GiB, 63585648640 bytes, 124190720 sectors

And they look different (color, text quality), maybe a bad batch in a factory

loverpi

@tstyopin There was an update to the mmc driver in Le Potato. It improves high speed tuning parameters for eMMC. Can you try with the latest images to see if the bug still occurrs? If not, let us know here.

tstyopin

loverpi said:

@tstyopin There was an update to the mmc driver in Le Potato. It improves high speed tuning parameters for eMMC. Can you try with the latest images to see if the bug still occurrs? If not, let us know here.

Hello!
Thank you for comment! Seems that shipped LePotato image doea not work with btrfs filesystem well. I moved to ext4 (Compiled an Armbian image by myself), and problem is gone.