Q: Is a spun-down array synced and save?

[hawihoney]

If the array is spun down after (in my case) 15 minutes, is it possible that it's content is not synced (cache written to disks and applied to parity)?

 

We had a power outtage yesterday. I know that two DAS (Direct Attached Storage) boxes were spun down completely before this crash. Is it possible that parity is out of sync in that situation? I guess no, must be save. What do you think?

 

Thanks.

 

Edited September 17, 2024 by hawihoney

[JorgeB]

Difficult to say, just run a parity check.

[hawihoney]

2 hours ago, JorgeB said:

Difficult to say, just run a parity check.

 

I try to avoid that - thats my reason to ask. Three arrays were affected during the power outtage. 1 array was working and does parity check currently. 2 arrays were spun-down completely. Parity check on them takes 35 hours each.

 

I'm pretty sure that a spun-down array is save, but only the developer knows.

 

Edited September 17, 2024 by hawihoney

[JorgeB]

19 minutes ago, hawihoney said:

I'm pretty sure that a spun-down array is save

I agree that it should be OK, but can't say for sure.