4th master hard disk error

All of a sudden I'm getting an error on startup:

"4th master hard disk error, press F2 to continue"

I'm currently running chkdsk but would love opinions on why this is happening all of a sudden.
hrolsonsAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
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.

Carlos IjalbaIT Systems DirectorCommented:
I assume that you have a RAID controller with x disks attached, and that the controller is reporting a disk failure, so you should press F2, go into the controller's menu, and do a disk rebuild or a replacement, depending on the errors reported.
rindiCommented:
Chkdsk won't help, it is only good for testing file-systems, and not the disk itself. For that you would need the disk manufacturer's diagnostic utility which you can find on the UBCD provided it isn't an SSD:

http://mirror.sysadminguide.net/ubcd/ubcd535.iso

But usually if the BIOS already protests, it is a SMART error, and then the diagnostic will tell you to replace the disk. So get a replacement.
hrolsonsAuthor Commented:
I have a Synology Diskstation that is attached to the network.  It's not reporting any errors.

I unplugged a secondary hard drive on the machine and the error went away.  I guess just a bad secondary hard drive.
LeeTutorretiredCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
rindiCommented:
Replacing the bad disk as I mentioned is about the same as disconnecting it, as the asker did, so my answer was correct.

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
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
Storage Hardware

From novice to tech pro — start learning today.