Re: btrfs-scrub: slow scrub speed (raid5)

Sebastian Döring
2020-02-06T18:13:56Z

(oops, forgot to reply all the first time)

> Is RAID5 stable? I was under the impression that it wasn't.
>
> -m

Not sure, but AFAIK most of the known issues have been addressed.

I did some informal testing with a bunch of usb devices, ripping them
out during writes, remounting the array with a device missing in
degraded mode, then replacing the device with a fresh one, etc. Always
worked fine. Good enough for me. The scary write hole seems hard to
hit, power outages are rare and if they happen I will just run a scrub
immediately.