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Switching from flexraid...


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#21 Doofus OFFLINE  

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Posted 14 October 2019 - 01:12 PM

Bit rot seems to be a bit of a myth. There doesn't appear to be many confirmed incidents, let alone anything catastrophic. Duplication/backups would seem to be the preferred safeguard.

This Reddit discussion is interesting

https://www.reddit.c...heck_solutions/

Edited by Doofus, 14 October 2019 - 04:50 PM.


#22 Doofus OFFLINE  

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Posted 14 October 2019 - 01:13 PM

For the record, I have three drivepools, two with duplication and I also run scanner.

#23 TeamB OFFLINE  

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Posted 14 October 2019 - 04:21 PM

Perhaps bit rote was not the correct term.

What I am referring to is where you have a large file that is very infrequently accessed, perhaps months or even years between accesses, sectors used by the file can fail due to magnetic properties or physical changes on the disk, these normally just show up as bad sectors in a scan for hard fails (pysical) and they are silently (mostly) fixed is they are just soft fails.

If you are not accessing the sectors the drive does not check them by itself.

I did not do deep scans (sector by sector checks) of my drives for the first 3 years of "collecting" media and one day a bunch of my media was not readable, when I did do a sector scan I had enough bad sectors of a 3 year old drive that I lost a bunch of stuff.

Not a big deal as I could just "collect" them again in a better version this time but I did lose some photos that was a bit of a pain.

Anyway I find dong sector data scans regularly is preferable for me and Stablebit scanner can scheduile this and checks by data integrity in the background regularly, over the years it has found failing disks well before SMART data flagged the drive as failing.



#24 Doofus OFFLINE  

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Posted 14 October 2019 - 04:53 PM

That's where duplication saves your bacon. With balanced and duplicated files, that should protect you well enough. I do have scanner set to automatically health check, though.

#25 TeamB OFFLINE  

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Posted 14 October 2019 - 05:25 PM

I use SnapRAID, it has "saved my bacon" a few times.


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#26 Doofus OFFLINE  

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Posted 14 October 2019 - 05:39 PM

I use SnapRAID, it has "saved my bacon" a few times.


Does that just use parity?

#27 TeamB OFFLINE  

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Posted 14 October 2019 - 05:48 PM

Does that just use parity?

Yes.

 

My config I have 4 data drives and 2 parity drives

 

https://www.snapraid.it/faq#howmanypar


Edited by TeamB, 14 October 2019 - 05:51 PM.

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