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Raid Calculator

V

Vicey

Weaksauce
Joined
Jul 3, 2010
Messages
70
Hey everyone, I was looking around on my phone for a RAID Calculator in the App Store and I couldn't find one that offered all the options I wanted. They either didn't have the RAID modes I wanted to use, didn't allow the specifying of a high number of disks or didn't have the disk capacities I wanted to use. So then I tried google and found a few websites but again lacked some features, mostly outdated ones that didn't have 3TB or higher disks listed.

So I decided to write my own and to make it just a simple no-nonsense webpage. So I added what I believe to be the most popular RAID modes to it (JBOD, 0,1,2,3,4,5,6) added in Hard Disks from 160GB to 6TB (Which I don't think are even out yet) and allow you to specify up to 9999 disks in a single array. It then shows you the post-format amount of storage you'll receive. Not the Kilo = 1000, but Kilo = 1024 formatted size.

Now the calculator is pretty dumb, it expects you to at-least understand RAID and its limitations. The calculator will not stop you from being able to specify a RAID6 with only 2 disks for example, but it will list the usable storage as just 0.0TB / 0.0GB

Anyway here is the link: http://www.renmx.com/raidcalc/index.php

I hope you like it. If you find any bugs or anything incorrect just reply in this topic and I'll fix it. If you want any other RAID modes or disk capacities added to it simply post those here and I'll add those too. I hope you will find this useful :)
 
This is a great calculator.
EDIT: Fixed :cool:
 
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Have you thought about adding RAID10 or RAID0+1?

This should be stickied and the official [H] RAID Calculator. :)
 
Ok I've added RAID 1+0, 0+1, 5+0 5+1 6+0 and 6+1

I think they are all correct I looked up the information online if anyone sees any issues with these or something that isn't correct please post and I'll correct it :)
 
please add 450 and 600 drive sized for us fibre channel folks. ;)
 
Done. I've added 150GB, 450GB, 600GB and 900GB sized disks. If you would like any others added simply reply and I'll be happy to add them in :)
 
Most RAID controllers need symmetric arrays for nesting. So a 6 disk RAID10 array would have the same capacity as a 7 disk array, but the 7 drive array would revert to having a hot spare.

And your nested RAID levels can have different capacities.

For instance a 12 disk RAID50 array can either be 4x3 (800GB with 100GB drives) or 3x4 (900GB with 100GB drives).

I've got 12 drives in an array and did a whole bunch of studies about which was faster (RAID 10, 0+1, 50, 60, 5, 6 etc.), and concluded I was maxing out the bus or controller card so it was a moot point :). I settled on RAID 50 for 1.08TB net (3 x 4 drive RAID 5 arrays in RAID 0) from 120GB SSD's. This is my OS drive, hits about 1,200 MB/s and consumes about 30 watts total; much better than my old 15k drives!

IMG_1397_W.jpg
 
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Somethings busted

600gb drives
Raid 1
24 Drives

RAID1
*Usable Storage: 0.5 TB / 558.8 GB
RAID1 Mirrors your data from one drive to all the other drives for redundancy
:eek:
 
Can you explain in a little more detail what is wrong with it?

From what I understand RAID1 mirrors the data from one drive to another correct? - I'll be happy to fix the problem if I know what the problem is :D
 
nice program

600gb drives
Raid 1
24 Drives

7.2 TB usuable?

something is wrong for any drives number, with 600gb and raid 1. same answer
 
That would mean 50% of the storage disks are being mirrored to the other half. This is how I had it set originally but another user in the thread said that was incorrect and I should instead set it the other way. Which way should I have it set?
 
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edit: oops, that's right, 1 disk and multipule mirrors. Maybe some are confusing this with something WHS does...
 
That is how I had it set originally until Red Falcon the first user to reply to the thread told me that was incorrect and I should change it to how it is now. I took his advice as I don't have experience with RAID1 and only put the specifications in how I read it online.

I guess he was wrong and I should change it back to how I had it?
 
Nope, that's correct, 600gb drives with 1,000 drives in RAID 1 would still be 600gb usable; every single drive would have exactly the same data.

A RAID 1 creates an exact copy (or mirror) of a set of data on two or more disks
Click to expand...
 
correct,

so maybe limit the input when people select Raid1 to be 2 drives only?;)

Tho you can have 3 or 4 (and more) way mirrors
 
I think it gives a good example of exactly what RAID 1 is meant to be in theory. Not practical whatsoever, but it explains it well.
 
Ok I've set it so you can now only select 2 disks when selecting RAID1.

Thanks a lot everyone for helping me with this :D
 
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