There have been already quite some topics here on this forum about RAID1 (HW and also SW). To repeat some: There is a long and complex path between the data in 'computer RAM' and storage media (non-volatile memory). Like the VIA USB3 chip in the RPi4 to mention 1. If along that path your data gets corrupted, you won't notice, it gets stored corrupted 2x times. You only know later, can be weeks or months, that some program reading it will hiccup, crash or else.Just in case you are interested, that Radxa Quad Sata adapter you're using supports RAID1 in hardware: https://forum.radxa.com/t/setting-up-ha ... oller/5863
In my case it is now clear to me that the Intel J1900 (server board with BMC etc) somehow has corrupted on-disk structures. There is a small chance that something in the Debian12 OS is the cause, but I can't prove it, the board is dead, its RAM is still working in other motherboard. I discovered the corruption yesterday, filesystem went read-only. No data loss, it is just a metadata issue, but can't write to it anymore. So now I am glad I had already another 8TB HDD prepared with cloned/identical filesystem structures in another computer that is only running once a day just for sync/replication. So instead of 'Redundant Array of Inexpensive Disks', I use 'Redundant Array of Inexpensive NAS' more or less.
Long time ago I experimented with automatic distributed filesystem/NAS, but that is just way to much overkill for a home I concluded. And they run all the time, so assuming HDDs and traditional Intel core based motherboard, you will never get to the low power I currently achieve.
Statistics: Posted by redvli — Tue Mar 04, 2025 9:58 am