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...
Upgrade the memory of your 2018 Mac mini up to 64GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$1799 $1399
SAVE $400

$2999 $2399
SAVE $600

$131 $131
SAVE $0

$539 $539
SAVE $0

$18599 $17599
SAVE $1000

$600 $400
SAVE $200

$274 $174
SAVE $100

$1799 $1399
SAVE $400

$1399 $1049
SAVE $350

$150 $50
SAVE $100

$380 $340
SAVE $40

$489 $389
SAVE $100

$274 $174
SAVE $100

$400 $300
SAVE $100

$699 $699
SAVE $0

$499 $499
SAVE $0

$4500 $4500
SAVE $0

$1000 $1000
SAVE $0

$700 $700
SAVE $0

$1499 $699
SAVE $800

$700 $700
SAVE $0

$1499 $699
SAVE $800

$450 $110
SAVE $340

$369 $200
SAVE $169

$1699 $1399
SAVE $300

$649 $649
SAVE $0

$1498 $998
SAVE $500

$999 $949
SAVE $50

$1099 $999
SAVE $100

$400 $300
SAVE $100

Mercury Extreme Pro 3G Single Drive Performance

This page discusses single drive sustained transfer rate.

Mac Pro single drive sustained transfer rate

Sustained transfer tests were performed using the DiskTester fill-volume command. For the single-drive test, the SSDs were plugged into the Mac Pro internal SATA drive bays.

For a single drive, write speed hits 257MB/sec and read speed about 270MB/sec. The drop-off at the end is typical of all drives, and related to operating system behavior.

What’s so impressive is that the speed stays high, even on the 2nd pass, and even after I wrote 1/2 million 128K files to a RAID 0 stripe of the two drives, a scenario that will badly internally fragment many SSDs.

MB/sec filling the entire drive capacity
Click for larger image

MacBook Pro 17" 2009 single drive sustained transfer rate,

The 2009 Apple MacBook Pro series has an internal SATA connection which is impaired in some inexplicable way, starting with 2009 unibody models (older models might be affected also). Write performance tends to be sub-par and erratic, and I’ve seen this with more than one brand of SSD, though read performance is high. Because the MacBook Pro stands to gain more than just about anything in terms of performance, this is is disappointing.

The test results shown here used the 2009 Apple MacBook Pro 17" 2.93GHz model. Average speeds for Disktester fill-volume were 179 MB/sec write, and 261 MB/sec read. This is outstanding performance of course, but it’s still a disappointment to see the 257 MB/sec of the same drive in the Mac Pro lose 78 MB/sec, dropping to 179MB/sec in the MacBook (semi?) Pro. As well, performance is not consistent. This is particularly an issue for Photoshop scratch volume performance.

Immediately following this test, I confirmed that the results above with the Mac Pro remained as good as ever, showing that the MacBook Pro SATA port is the culprit, not the SSD itself. I also tested a second copy of the SSD, and found similar results, so it wasn’t one particular unit. Just as the Sonnet E4P shows superior performance to the Firmtek SeriTek card, so too can different SATA interfaces vary in performance. Perhaps a 2010 MacBook Pro will fix this problem.

MB/sec filling the entire drive capacity on 2009 unibody MacBook Pro
Click for larger image

Save the tax, we pay you back, instantly!
View all handpicked deals...

Olympus OM-D E-M1X Mirrorless Digital Camera (Body Only)
$2999 $2399
SAVE $600

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__