HP dl180 g9 - raid5 hot spare disk

A friend got a new server with 8 HDDs, he created a raid5+1 hot spare. and installed the os. after that he wanted to test whether the hot spare would would and he pulled a disk from raid5. successfully the hot spare was added to the raid5 and rebuilt the raid5.

Now the question is that the HDD he earlier pulled; he wants to put it back and use as the new hot spare. since there is some data in this HDD since it was participating in the raid5 earlier, will this work as hot spare? or else will he have to format this disk? if so, how to format? from ACU?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

MASEE Solution Guide - Technical Dept HeadCommented:
You have to ADD this HDD as a hotspare from ACU.
Format will be done by the system.

Some/rare cases pulled out HDD will become faulty if pulled while working.
But you can try adding again as hotspare.
lapatiyaAuthor Commented:
My stupid friend pulled it while working from this brand new, just-installed server. so hope the HDD in brand new condition with some data on it. so are you sure that if he add this disk again to the server and edit the existing raid5 to have this as hot spare and it will work?

are you seure that in a future failure the hot spare disk (with exiting data) be erased before joined to the raid5 again?
MASEE Solution Guide - Technical Dept HeadCommented:
-->are you sure that in a future failure the hot spare disk (with exiting data) be erased before joined to the raid5 again?
Yes. But you have to make sure it is added as hotspare and healthy.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
C++ 11 Fundamentals

This course will introduce you to C++ 11 and teach you about syntax fundamentals.

lapatiyaAuthor Commented:
got it! thanks
lapatiyaAuthor Commented:
Thanks for the confirmation
MASEE Solution Guide - Technical Dept HeadCommented:
Do not forget to check the health of the HDD added.
If it is not healthy it will not function as hotspare.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Server Hardware

From novice to tech pro — start learning today.