Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Handpicked deals...
$1275 $1275
SAVE $0

$140 $100
SAVE $40

$346 $170
SAVE $176

$689 $469
SAVE $220

$4499 $2649
SAVE $1850

$1699 $1199
SAVE $500

$5999 $5499
SAVE $500

$181 $141
SAVE $40

$7699 $7199
SAVE $500

$4499 $2649
SAVE $1850

$400 $330
SAVE $70

$4499 $2649
SAVE $1850

$4999 $4599
SAVE $400

$2350 $1950
SAVE $400

$1699 $1299
SAVE $400

$799 $699
SAVE $100

$200 $157
SAVE $43

$1997 $897
SAVE $1100

$250 $110
SAVE $140

$1398 $898
SAVE $500

$1199 $1099
SAVE $100

$3999 $2499
SAVE $1500

$200 $170
SAVE $30

$3999 $2499
SAVE $1500

$1498 $1398
SAVE $100

$2497 $1897
SAVE $600

$748 $598
SAVE $150

$899 $699
SAVE $200

$1300 $1100
SAVE $200

Upgrade the memory of your 2019 iMac up to 128GB

CalDigit T3: 3-HDD RAID-1 Mirror

Last updated 2014-01-10 - Send Feedback
Related: hard drive, RAID, RAID-1, storage, Thunderbolt

A RAID-1 mirror replicates the data across N drives (N = 3 here) for fault tolerance: in a mirror, N-1 of N drive can fail with no loss of data or functionality.

For reads with a RAID-1 mirror, there is potential to read from more than one drive, thus enhancing read performance. It is never as as good as RAID-0 striping because the reads are offset (staggered) among the drive members of the mirror, but an optimized controller or driver can extract some benefits.

Results

Tested with three fast Toshiba 7200 rpm DT01ACA200 series drives using SoftRAID 5 with reads from all drives enabled.

MB/sec:
Single drive: 184 write / 181 read
2-drive mirror: 184 write / 198 read
3-drive mirror: 184 write / 271 read

CalDigit has three SATA controllers in the T3, and this apparently pays off by delivering 178 MB/sec writes speed (single drive speed), and 274 MB/sec read speed, which is about 54% faster than the ~1804MB/sec speed of a single drive used here. It’s a far cry from the theoretical 3X speed that a sophisticated hardware controller could in theory obtain, but here at MPG we have yet to see such a device.

Bottom line: a triple RAID-1 mirror in the CalDigit T3 delivers outstanding fault tolerance along with read speed sufficient for the vast majority of computing tasks.

Write speeds are in gray and are identical whether it is a single drive or a 2-drive or 3-drive mirror—this is as expected.

CalDigit T3 Thunderbolt: RAID-1 mirror speed (2 and 3 drives) vs single drive
View all handpicked deals...

Nokia 2.2 TA-1179 32GB Smartphone (Unlocked, Tungsten Black)
$140 $100
SAVE $40

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__