SD-card failure detection

[raunz]

The current.db was indeed corrupted. I extracted from my new project backup the ./current.db file, which is correctly detected as "SQLite 3.x database, last written using SQLite version 3019003".

The file from faulted SD is just data
-rw-r--r-- 1 rauno rauno 581632 juuli 11 2017 current.db.katkine

$ file current.db
current.db: data
sqlite3 dump:
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
/**** ERROR: (26) file is encrypted or is not a database *****/
ROLLBACK; -- due to errors

One side note more: after restoring my backup from 2017, all the modbus JSONs and groups were restored, but in configuration the RS485 port remained to default disabled state. I had to manually reconfigure RS485 port and Modbus started to work again.

When I'm all set up again, I'll take the SD from logicMachine and back it up with 'dd if=/dev/sda of=lm4.full-dd.img conv=sparse bs=1M count=4000'. When a SD card failure bothers me again, I just need to copy the image to a new SD card (8GB+) and I'm back in business within 5 minutes

Thanks for the help!