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Well, the question is how much data is lost when one drive fails completely and i get a single bad sector on another while rebuilding. Do I lose the whole segment? And how big those segments are? If one segment would be one file, then I would lose just one file.
– Lukáš Řádek
Commented Oct 27, 2021 at 7:50
You might include your question in your inital posting.
– r2d3
Commented Oct 27, 2021 at 14:35
I feel like I did. I am simply wondering how much data will I lose with one disk failed and single bad sector on one of the remaining drives.
– Lukáš Řádek
Commented Oct 27, 2021 at 16:28
Shoot a torpedo against the deathstar in Star Wars. What will happen? What are the odds? Break a node in the internet. What will happen? In addition to what will really happen with the disk your interface may act differently depending on your RAID5 solution provider.
– r2d3
Commented Oct 27, 2021 at 16:33
The bigger your drives and the more data you have, the bigger your chance of data loss with RAID5. It's simple math. Check drive specs for error rates. Example: 1 in 10^14 means you'll probably see unrecoverable error(s) around the time you have written ~10TB to that drive. Combine that with MTBF and 2 drives will statistically ~halve your file system's lifetime. 3 drives will statistically reduce it to just a bit above a third of the time before data loss...
– svin83
Commented Nov 11, 2022 at 11:14

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