Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Rigorously lab tested and OWC certified.

CalDigit T3: 3-HDD RAID-5 (Striping with Parity)

Last updated 2014-01-11 - Send Feedback
Related: Storage, RAID, Thunderbolt
CalDigit T3 volume icon

A RAID-5 uses one drive of N for parity information. It can be thought of as a RAID-0 stripe with one parity drive (“striping with parity”), for fault tolerance. Should one drive fail, the RAID degrades to a RAID-0 stripe.

The best speed that can be expected of an N-drive RAID-5 is the speed of an (N-1) RAID-0 stripe, because the parity drive must also be written to. However, even hardware RAID-5 might struggle with that goal; there is some overhead.

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).

A RAID-5 volume of 4TB was created using a beta version of SoftRAID 5, using three 2TB drives.

The SoftRAID 5 driver delivers performance right at the best possible speed of around 360MB/sec — impressive. The falloff over the remaining capacity is an unavoidable function of hard drive speed across the capacity (it would not occur with SSDs).

CalDigit T3 Thunderbolt: RAID-5 speed of three fast 2TB hard drives
Rigorously lab tested and OWC certified.
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 16 hours unless noted. Certain deals may last longer.
$2699 SAVE $300 = 10.0% Canon 11-24mm f/4 EF L USM in Lenses: DSLR
$3297 SAVE $800 = 19.0% Nikon D810 DSLR with 24-120mm in Cameras: DSLR

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__