Storage Expansion With a Speed Boost
Add a 2.5" SATA 6G Drive to your Mac or PC
Directly mount any standard 2.5" drive.
Up to 550 MB/s sustained speeds.
Enhance SATA 3Gb/s systems with SATA 6Gb/s support.
link here
also will this installation make it possibly to format & use
these 3 terabyte drives which seem to be invisible to disk utility?
10.10.5
2x2.26 Gh quad core xeon
I have a 6G ssd in there.
Thanks anyone !
Steve z
You link returns a generic MacSales/OWC page with:
Sorry, but we could not find your requested item.
Yes, you can get PCle cards that accept 2 1/2" SSDs and that will use a SATA III (6 GB/s) drive at its full speed. You can get PCLe cards that will accept two 2 1/2 inch SSDs too.
thank you
http://eshop.macsales.com/item/OWC/SSDACL6G.S/
so is this a significant upgrade for $58?
Am I buying increased read/write speed?
Maybe i dont have SATA III
I bought it a couple of years ago and
maybe there was not Sata III at that time?
Cant tell on the label.
Yes, the PCle card will allow operation of a STA II (6 GB/s) SSD at its full speed.
In this statement
"Maybe i dont have SATA III
I bought it a couple of years ago and
maybe there was not Sata III at that time?
Cant tell on the label."
I do not know what "it" is
" it " = the sata III ssd that runs my computer.
I reviewed the product from OWC, using it a 2010 Mac Pro and found it to be a solid product that I really liked.
Accelsior S Review: Give Your Mac Pro a Performance Boost
Highly recommended for those wanting to improve drive performance at a reasonable cost.
Tom
What specific SATA II drive is it. Some, especially older ones ae not that fast.
Also, do you have TRIM enabled on the SSD?
Sometimes/some SSD need that to maintain speed otherwise they get filled up with deleted data. For oe info see:
http://www.buildcomputers.net/trim-support.html
How you enable TRIM on a Mac depends upon the OSX version.
this is great Tom, thanks a lot
tho I am wondering how to do this for early 2009 4,1:
Earlier Mac Pro models had specific lane assignments by PCIe slot,
it IS SATA III 6G
owc mercury extreme electra
firmware 5.0.4
Trim?
max osx 10.10.5
"How you enable TRIM on a Mac depends upon the OSX version."
10.10.5
here is what the manual says for macPro 4,1 early 2009:
You can install additional PCI Express graphics and expansion cards. Before installing a card, check its specifications to make sure it can operate in your Mac Pro:  Slots 1 and 2 are x16, PCI Express 2.0 slots  Slots 3 and 4 are x4, PCI Express 2.0 slots All four slots support 16-lane cards.
OK how about this regarding OWC SSD's:
if you have an OWC SSD, though, you don’t need TRIM. The SandForce controller in our SSDs takes care of this “garbage collection” as well as performs various other tasks that keep your drive running at optimal speed, without the drop-off that you see with other brands. Especially note page two of this performance testing expert’s report where he feels so strongly about TRIM’s inefficiency that he calls call it “half-baked”…and that’s the kid friendly version of the phrase.
There is a debate whether or not you need TRIM for the OWC SSDs
To enable TRIM on 10.10.4 and later:
Only the 2006-2007 Mac Pros have configurable PCle slots
Mac Pro (Early 2008 to Mid 2012): About the PCI Express slots - Apple Support
from OWC:
"TRIM does not need to be enabled on our drives. They have built in processes that help to maintain them."
"Only the 2006-2007 Mac Pros have configurable PCle slots"
yes, configurable, but other iterations are factory configured
and compatible, as I read it, and as OWC sells it.
What OWC says with regards to TRIM is debatable.
is this a useful tool, early 2009 4,1: OWC Accelsior S
