Ask the Expert

How much hard disk drive space should I actually use?

It was once a common practice to use only up to 80% of the total hard disk drive capacity for optimal performance -- beyond 80% of capacity usage and it was time to buy more disks. Is still a good formula to follow? If so, does it apply to different RAID configurations?

Requires Free Membership to View

I still like to follow this rule of thumb, no matter how much data is concerned, and not for performance reasons. Rather, once 80% of my storage is used, I start worrying about running out of space. It may surprise you to learn that actual storage utilization is usually much lower than 80%! In my study of utilization across industries and operating systems, I found the average utilization of production systems was actually below 40%.

This was first published in December 2004

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: