Is parity recalculated after every reboot?

[MontgomeryDixon]

I'm a noob, so sorry if this is a dumb question.

 

I want to run Unraid on my desktop computer and do my work in a VM with passthrough. Can I shutdown Unraid every night or will this mess up the parity (assuming that parity was finished calculating before shutdown)?

[trurl]

Parity is realtime. Whenever any data disk is written parity is also updated.

[ChatNoir]

8 hours ago, MontgomeryDixon said:

I'm a noob, so sorry if this is a dumb question.

 

I want to run Unraid on my desktop computer and do my work in a VM with passthrough. Can I shutdown Unraid every night or will this mess up the parity (assuming that parity was finished calculating before shutdown)?

Are you talking about the initial parity build / regular parity check ?

[MontgomeryDixon]

10 hours ago, ChatNoir said:

Are you talking about the initial parity build / regular parity check ?

Regular parity check.

[trurl]

If you initiate a parity check or a scheduled parity check runs, if you don't complete the parity check before shutting down, then the parity check would not have completed, but parity would be just as valid as it was before starting the parity check.

 

Parity checks are not required to maintain parity because

19 hours ago, trurl said:

Parity is realtime. Whenever any data disk is written parity is also updated.

 

[trurl]

Perhaps your question is related to unclean shutdowns. If you don't cleanly shutdown your server, then you will get a parity check when you reboot. You must shutdown or reboot from the webUI if at all possible so Unraid can cleanly stop.

[trurl]

 

[MontgomeryDixon]

Thank you @trurl for the info. That makes sense now, I was confused. Thanks!