On 12/5/24 5:14 PM, Robin Laing wrote:
I have looked at the tools and see that if you set a cron job for "scrub" that will minimize issues. Everything I read, "scrub" should be run at least monthly if not weekly or more often. Also issues with how free disk space is reported, even yesterday I current reports on freespace.
Do you know what "scrub" is? It's the same thing that mdraid does by default once in a while. It scans the drive to make sure the hard drive is still good. It's more useful with btrfs and raid than ext4 because there are checksums, so you can tell if the hard drive has mangled the data. You can't do that with ext4 because there's no way to validate the read data. You don't have to do it, it's just a safety check for you to check the hard drive.
The free space issue is people not understanding how btrfs works. Given subvolumes and COW, space usage is hard to define.
Even from reports of this year, it is stated that if you use BTFS, you need to be proactive on management, hence the comment about scrub. A statement that from what I have read, should be a script in crontab on install of btfs. Also, defrag on a regular basis with filefrag.
I wonder where you are seeing these suggestions because they really are strange.
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