I have recently become interested in mini PCs, but one thing that is stopping me is a feeling that bit rot could cause me to lose data.
Is bit rot something to worry about when storing data for services such as Git, or Samba. I have another PC right now that is setup with btrfs raid1 and backups locally and to the cloud, however was thinking about downsizing for the benefit of size and power usage.
I know many people use the mini PCs such as ThinkCentres, Optiplex, EliteDesks and others, I am curious if I should be worried about losing data due to bit rot, or is bit rot a really rare occurrence?
Let’s say I have backups with a year of retention, wouldn’t it be possible that the data becomes corrupt and that it isn’t noticed until after a year? for example archived data that I don’t look at often but might need in the future.
Nightly automated runs of the chkbit script is the only thing that alerted me to the fact that either the SSD or storage controller in my Mac Mini had issues and was corrupting data. I was very thankful to have already had the automation in place for that exact scenario.
It theoretically shouldn’t be necessary for filesystems that have built-in checksumming.
This is what I use, will work with any filesystem (it writes hashes in hidden/dot files) and on any OS as long as Python is available: https://pypi.org/project/chkbit/
It runs ahead of my nightly backup. If it fails, the backup won’t proceed.
Edit: Because the script relies on hashing files, it uses tons of both disk IO and CPU when it runs, but the tradeoff is worthwhile to me.
