Re: problem killing raid 5

[Michael Tokarev <mjt@tls.msk.ru>]

Patrik Jonsson wrote:
> Michael Tokarev wrote:
[]
>> But in any case, md should not stall - be it during reconstruction
>> or not.  For this, I can't comment - to me it smells like a bug
>> somewhere (md layer? error handling in driver? something else?)
>> which should be found and fixed.  And for this, some more details
>> are needed I guess -- kernel version is a start.
> 
> Really? It's my understanding that if md finds an unreadable block
> during raid5 reconstruction, it has no option but to fail since the
> information can't be reconstructed. When this happened to me, I had to

Yes indeed, it should fail, but not stuck as Daniel reported.
Ie, it should either complete the work or fail, but not sleep
somewhere in between.

[]
> This is why it's important to run a weekly check so md can repair blocks
> *before* a drive fails.

*nod*.

/mjt