This morning I recognized openHAB had crashed and was no longer available by any GUI or even PuTTY. After switching power off and back on I could see very little info about the issue in the log. As NUL bytes are not shown in code fences I’ll post a screenshot of the log. [image] The line has 1148…

Thank you for the hint. Actually I’m not using an SD card (sorry to miss that info in the original post; edited it now to include it). The whole system runs and boots from SanDisk Extreme PRO USB 3.1 Solid State.

[image] Mhgglmmr: SanDisk Extreme PRO USB 3.1 That is a USB stick that can get corrupted the same as an SD Card.

Basically true, but I thought to have picked an option with extremely low chance for such failure. I intentionally didn’t use a cheap USB stick I had laying around but a solid state flash drive with way too much capacity for wear leveling and “liftime warranty”. Is there any way to find out for sur…

SSDs are a different architecture that USB Sticks and SD Cards.

Exactly. So my current understanding is that the stick I have is technically a SSD, just with a shape similar to a USB stick, thus being much more reliable than SD cards or USB sticks. Therefore I would be surprised if the issue is caused by corrupted memory. But I’m not a memory technology profess…

[image] Mhgglmmr: So my current understanding is that the stick I have is technically a SSD, just with a shape similar to a USB stick, thus being much more reliable than SD cards or USB sticks I don’t think so. That would require a battery and a DRAM cache, eventually, both of which I think y…

It’s important to realize that power failures can and will also cause file system corruptions, especially on flash memory. 3.5" type SSDs can also have this problem though they often have room to insert some capacitors or batteries that give the SSD enough time to dump out the currently ongoing writ…

Alright, thank you all very much for your support. Actually there has been a power outage during the recent storm Ciara. That would make sense. I’ll make another backup, set the system up from scratch and urgently finish my UPS setup (parts laying here for months now).

openHAB Community

openHAB crashed, log full of NUL bytes

Setup, Configuration and Use Runtime

mstormi (Markus Storm) February 24, 2020, 8:31am 2

Neither do we. It’s no wellknown issue.
If I was to guess, your SD card got corrupted.
To play it safe, exchange it and use ZRAM next time.