Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Capacities up to 48TB and speeds up to 1527MB/s
Small Business Tax Write-Off?
Now is the time to purchase computer or photo gear for 2018 federal tax write-off. Consult with Lloyd.

CalDigit T3: 3-HDD RAID-5 vs RAID-0

Last updated 2014-01-11 - Send Feedback
Related: hard drive, RAID, storage, Thunderbolt

Performance with RAID-0 striping should run at the speed of the drives installed, or very close to it: three drives striped should run nearly 3X faster than one drive.

A RAID-5 (“striping with parity”) uses the capacity of drive for parity information (could be distributed among drives or dedicated to one drive). Hence, the best speed that can be expected of an 3-drive RAID-5 is 2X that of a single drive.

When a drive fails in a RAID-0, the volume is kaput. When a drive fails in a RAID-5, it degrades to a RAID-0. Hence one trades off some speed for fault tolerance.

Results

Tested with three fast Toshiba 7200 rpm DT01ACA200 series drives. Single-drive speed of the drives used is ~180MB/sec on the fast portion of the drives (left side of graph).

The RAID-5 volume was created using a beta version of SoftRAID 5.

The RAID-5 speed is about 2X the speed of a single drive and the RAID-0 speed is about 3X the speed of a single drive. Which is what one would expect.

The falloff over the capacity (left to right in graph) is an unavoidable function of hard drive speed across the capacity (it would not occur with SSDs).

CalDigit T3 Thunderbolt: RAID-5 vs RAID-0
Deals Updated Daily at B&H Photo
View BEST Deals Right Now
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 5 hours unless noted. Certain deals may last longer.
$599 SAVE $200 = 25.0% Canon 17-40mm f/4 EF L USM in Lenses: DSLR
$519 SAVE $130 = 20.0% Canon 70-200mm f/4 EF L USM in Lenses: DSLR
$449 SAVE $100 = 18.0% DJI Goggles Racing Edition in Video: Drones
$299 SAVE $50 = 14.0% $149 FREE ITEMS DJI Spark Quadcopter (Sunrise Yellow) in Video: Drones
$50 SAVE $100 = 66.0% Lowepro DroneGuard CS 400 in Video: Drones
$2497 SAVE $300 = 10.0% $29 FREE ITEMS Nikon 70-200mm f/2.8 AF-S NIKKOR E FL ED VR in Lenses: DSLR
$898 SAVE $500 = 35.0% Sony a7 II Mirrorless in Cameras: Mirrorless
$898 SAVE $506 = 36.0% $19 FREE ITEMS Sony a7 II Mirrorless with Accessory Kit in Cameras: Mirrorless

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2008-2017 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__