Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Up to 1527MB/s sustained performance
Handpicked deals...
$1299 $1299
SAVE $0

$390 $270
SAVE $120

$1798 $1598
SAVE $200

$3297 $2797
SAVE $500

$3397 $2797
SAVE $600

$150 $90
SAVE $60

$1398 $898
SAVE $500

$3698 $2998
SAVE $700

$2998 $2498
SAVE $500

$1999 $1999
SAVE $0

$1799 $1299
SAVE $500

$1999 $1199
SAVE $800

$2299 $1599
SAVE $700

$2399 $2049
SAVE $350

$2799 $2399
SAVE $400

$2799 $1899
SAVE $900

$1199 $920
SAVE $279

$1349 $1049
SAVE $300

$997 $897
SAVE $100

$2099 $1699
SAVE $400

$1999 $1349
SAVE $650

$1999 $1599
SAVE $400

$1999 $1999
SAVE $0

$1329 $929
SAVE $400

$4499 $3999
SAVE $500

$329 $329
SAVE $0

$1499 $999
SAVE $500

$1499 $1289
SAVE $210

$2199 $1999
SAVE $200

$3399 $2199
SAVE $1200

$2468 $1768
SAVE $700

$1279 $1279
SAVE $0

RAID-5 vs RAID-4 with SSDs

OWC Thunderbay Mini

Thunderbay Mini configurations start at about $379 without drives. Thunderbay Mini RAID-5 edition also available.

RAID-4 is striping with a dedicated parity drive
RAID-5 is striping with distributed parity

MPG tested the throughput of the OWC Thunderbay 4 Mini using DiskTester run-sequential-suite on a late 2013 MacBook Pro Retina (Thunderbolt 2).

disktester run-sequential-suite --xfer-steps 4 --test-size 2G--starting-xfer 64K --ending-xfer 256MB

With 4 OWC Mercury Extreme Pro 6G SSDs, RAID-4 outperforms RAID-5 by about 10% for reads (compare green and blue lines). Write performance is identical.

Findings might or might apply to hard drives, whose performance characteristics differ from SSDs.

OWC Thunderbay Mini performance: 4 OWC 6G SSDs, RAID-4 vs RAID-5 for varying transfer size

Filling the entire volume with disktester fill-volume, observe that write speed for RAID-4 and RAID-5 is identical on SSDs. But read speed is about 12% higher for RAID-4.

disktester fill-volume --xfer 128M

OWC Thunderbay Mini performance: 4 OWC 6G SSDs, RAID-4 vs RAID-5 sustained transfer speed
View all handpicked deals...

Samsung 2TB T5 Portable Solid-State Drive (Black)
$390 $270
SAVE $120

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__