D-Link Forums

The Graveyard - Products No Longer Supported => D-Link Storage => DNS-343 => Topic started by: imranc on September 12, 2013, 09:17:01 AM

Title: Total Disk Space raid5
Post by: imranc on September 12, 2013, 09:17:01 AM

Hey Guys,

Ive searched the form in every way possible and went through 20 of the 31 pages on the forms.  I had one of my drives fail in my 343 which I have replaced. The NAS recognized the new disk right away and had no issues formatting it. Set up I currently have is 4 X 2TB drives set to raid 5.  I cant recall what the total usable disk size should be replaced.  This is what I see when I log into the device:

Total Hard Drive Capacity:     5900656 MB
Used Space:     3134071 MB
Unused Space:     2766585 MB



Am I missing anything?

Sorry for the newb question and appreciate any feed back you are able to give.

Thanks

Title: Re: Total Disk Space raid5
Post by: JavaLawyer on September 12, 2013, 09:34:56 AM

Your numbers look correct. The raw storage space for 4x2 TB HDDs is approximately 8 TB. RAID-5 needs approximately 25% of the available space for redundancy, which makes recovery from a dead HDD possible.

8TB * 0.25 = 6TB = 6,000,000 MB = ~5,900,656 MB

Title: Re: Total Disk Space raid5
Post by: imranc on September 12, 2013, 11:46:00 AM

thank you JavaLawyer.  Much appreciated

Title: Re: Total Disk Space raid5
Post by: JavaLawyer on September 12, 2013, 12:09:25 PM

Glad to help!

If you're into math, here's a more detailed explanation I previously posted in the ShareCenter FAQ board:     
DNS ShareCenter - Total Usable Storage Space  (http://forums.dlink.com/index.php?topic=48259.0)

The ShareCenter FAQ board is also a good resource for information pertaining to your ShareCenter.