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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.
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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.

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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:<br />
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<a href="http://mirror.sysadminguide.net/ubcd/ubcd535.iso" rel="ugc">http://mirror.sysadminguide.net/ubcd/ubcd535.iso</a><br />
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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.
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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 [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.

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I have a Synology Diskstation that is attached to the network. &nbsp;It's not reporting any errors.<br />
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I unplugged a secondary hard drive on the machine and the error went away. &nbsp;I guess just a bad secondary hard drive.
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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.

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I've requested that this question be deleted for the following reason:<br />
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Not enough information to confirm an answer.
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I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.

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All of a sudden I'm getting an error on startup:<br />
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&quot;4th master hard disk error, press F2 to continue&quot;<br />
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I'm currently running chkdsk but would love opinions on why this is happening all of a sudden.
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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.

4th master hard disk error

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.