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Mercury Accelsior PCI Express SSD

I have just installed a Mercury Accelsior PCI Express SSD 480GB drive in my 2012 Mac Pro. My question : Can I ue it as my main boot drive in the pci slot by copying the HD over to it with the operating system?

Posted on Apr 10, 2014 7:22 PM

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Posted on Apr 11, 2014 1:30 AM

Nope. You need to either do a clean OS install or use a cloning program to copy the OS contents.



Doing a normal drag-n-drop will not copy all files.

12 replies

Apr 11, 2014 4:57 AM in response to DieselFuelForLife

Thanks for the reply. I kind of figured that. My fear is that once the copy is complete the drive will remain"ejectable" as it is now. It and the other SSD drive I installed as a scratch disk are all able to be ejected and disappear from the desk top even thought they are all internal. Any ideas around this to make em permanently visible?

Thanks again.

Apr 11, 2014 8:33 AM in response to capt.

The boot disk cannot be ejected, even if you're booting from a USB stick or DVD. Any disk that is not being booted from or being actively flagged for use by an open application can be ejected.


Their webpage tagline is "Boot, Launch, Create, and Save Faster", which means the card is bootable.


The best option is to do a clean install and use Migration Assistant to copy over your settings and programs.

Apr 11, 2014 10:33 AM in response to capt.

The Mac Pro silver tower does not contain firmware to do Internet Recovery independently.


It would be wise to create a Recovery Disk Assistant copy of your existing Recovery_HD (onto a separate thumb drive) before you make your move. A Recovery_HD may be difficult or impossible to create on the Acccelsior-based SSDs.


Mac OS X: About Recovery Disk Assistant


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Apr 11, 2014 3:43 PM in response to DieselFuelForLife

The point I was trying to get across is that you are venturing into an area where SSD problems may not be quite as recoverable as on old-fashioned rotating drives, and that the Silver Mac Pro towers do not have the benefit of built-in Firmware that can get you Utilities and simple Internet reload on a whim.


I intended to advocate using Recovery Disk Assistant to create a separate Recovery_HD on a 1GB USB thumb drive. I am sorry if that did not come through loud and clear.


You can certainly use an 8GB thumb drive and create a Full Installer if you prefer. I believe that will have a Recovery_HD on it as well.

Apr 13, 2014 2:39 PM in response to Martin Pace

Everyhting is up and running smoothly!! Thanks to everone for their help.

I finally used Super Duper to clone/copy the OS to the Accelsior drive and selected it as my startup disk in preferences and it booted up right away, no prblems. It is now non-ejectable as wel as the SSD drive I installed as the scratch. A Time MAchine backup of it and I think I am covered should things go sideways. I am going to keep the original HD for awhile just in case. I tried to use Recover disk assistant but it would not install saying the recovery disk on this computer is damaged or not present.?

Apr 13, 2014 3:12 PM in response to capt.

One of the differences between SD! and CCC is creating recovery partition (offering to)


I would also clone the SSD, may not need to even be as large, and could shrink and create a small slice on any drive, data or even TimeMachine. And if you do use CCC it is worth the fee, it will. One reason to use the clone instead of Recovery is Recovery mode when you run DU will not trim blocks which you want to do. In fact after cloning it is a good idea to run Disk Utility and make sure TE is installed on all your system drives.


SD and CCC generally work to clone. But there have been more than a couple cases it did not. And in some cases had to clone to the SSD while using another drive bay or external, and then move it to the PCIe cards, at least Sonnet Tempo SSD and maybe others like OWCs.

Mercury Accelsior PCI Express SSD

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