Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd B&H Deal Finder...
Buy other stuff at Amazon.com...
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$147 $80
SAVE $67

$260 $130
SAVE $130

$48 $28
SAVE $20

$580 $320
SAVE $260

$1699 $1199
SAVE $500

$799 $299
SAVE $500

$15199 $13699
SAVE $1500

$7995 $7495
SAVE $500

$1399 $1049
SAVE $350

$1299 $1099
SAVE $200

$700 $500
SAVE $200

$764 $399
SAVE $365

$290 $250
SAVE $40

$169 $99
SAVE $70

$370 $300
SAVE $70

$200 $170
SAVE $30

$250 $235
SAVE $15

$3899 $3699
SAVE $200

$2799 $2499
SAVE $300

$1199 $999
SAVE $200

$2999 $2399
SAVE $600

$18599 $17099
SAVE $1500

$600 $450
SAVE $150

$1149 $799
SAVE $350

$420 $170
SAVE $250

$1499 $649
SAVE $850

$1499 $649
SAVE $850

$420 $170
SAVE $250

$369 $239
SAVE $130

$1699 $1399
SAVE $300

$1498 $998
SAVE $500

$999 $949
SAVE $50

$1099 $999
SAVE $100

Upgrade the memory of your 2019 iMac up to 128GB
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!

Thunderbay Mini with SSDs: Incompressible Data

OWC Thunderbay Mini

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

To increase the lifespan of the flash memory, Sandforce-based SSDs compress data.

Data compression in an SSD reduces write performance when the data is incompressible (JPG, compressed PSD or TIF, most video, encrypted data, etc).

Many other SSDs do not compress data, but also require TRIM (not needed for Sandforce SSDs). It’s a total performance picture that must be assessed: performance under one’s own actual working conditions along with longevity.

In MPG’s multi-year experience with OWC SSDs (Sandforce-based), real-world performance has been excellent (e.g. Photoshop), and lifespan has never been a concern.

Worse case performance: incompressible data

disktester fill-volume --xfer 128M --pattern randomblock

The graph below shows performance with RAID-0, RAID-5 and single SSD for highly compressible data (zeroes) vs worst-case incompressible random data.

As can be seen, incompressible data takes a substantial toll on write performance, but has negligible effect on read performance. See the red bars for each.

Since many types of data are written once and read many times, the impaired write performance is of no consequence. Moreove, real world tasks can shine even when there is heavy write activity (see the Photoshop diglloydHuge results).

See also the results with the OWC 960GB Mercury Electra 6G SSD, which is much faster.

Toggle compare single SSD vs RAID-0 vs RAID-5.

OWC Thunderbay Mini performance: Photoshop scratch disk vs MacBook Pro Retina 1TB internal SSD
OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).



Deals Updated Daily at B&H Photo
View all handpicked deals...

Peak Design Everyday Backpack (20L, Heritage Tan)
$260 $130
SAVE $130

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__