64516 Views Previous 1 2 3 4 Next 56 Replies Latest reply: May 22, 2013 9:42 PM by Peter Thomsen Go to original post
I did have success using four 3TB drives in the Mac Pro just connected internally. Each was recognized as a 3TB drive. (And yes, I pulled them from the enclosure). I did some speed tests etc and they were not dog slow or anything.
I tried a number of different configurations on the current Mac Pro and a 3 year one with and without RAID. Only without the RAID card did the full 3TB show up for each drive. With the RAID card, only 2.2TB of each drive was recognized.
I have not tried it with 10.6.5 yet, but looking through the notes I don't see anything that would change the previous testing.
I also have a couple of 3TB Seagate GoFlex external USB hard drives that I want to put inside my Mac Pro. If I remove them from the enclosure, will they immediately work in my Mac Pro without re-formatting, or do I need to initialize and format the drives in OS X?
Also, how did you open the GoFlex enclosure? Did you manage to open it without damaging it?
I have tried to search for information about 4K sector size support in Mac OS X. I have found no mention on Apple sites of support or lack of support.
I have not seen anything, not even an anecdote, to indicate it is NOT supported.
Generally, when this occurs, it is because support is already built-in, and it is not mentioned because it is simply not an issue.
I posted half a dozen links in 3TB thread on PowerMac G5 taken from WD support and elsewhere, including Apple docs on support and the reasons behind GPT to support larger drives (as well as how it is needed for EFI based systems).
Intel may bring out more support for EFI with next generation of chips and the motherboards to support new socket, as well as the need to some extent to have support for booting Windows 64-bit and future on 2.5TB drives.
Hitachi 7K3000 3TB
Apple Secrets of GPT TN2166
There are some mentions of Mac OS X 10.4.6 or later for support of very large volumes.
Mac OS version 10.4 onwards (Tiger, Leopard and Snow Leopard) can use the GUID Partitioning Table scheme (GPT) which will align an Advanced Format drive correctly.
Mac OS versions using Apple Partition Manager (APM) will not align partitions correctly and will not provide optimum performance.
Thank you verry much for your extrem helpfull informations. Ok i though my HDD where not that old but anyway i have to invest money into HDD'S.
Here in Germany the Prices for MacPro's are anyway expensive. Apple sale theyr rears here in Euro for the same Price then in the US $. So our prices here is about 15 % over them in the US.
The used MacPro 2,66 XEON i get the offer for, is about 850 € including 4GB of RAM.
My Old G5 is anyway not anymore good usable for my need's, corse i need the new features from photoshop CS5.
Also thank you a lot for that verry heplfull links that you send me and the helpfull informations in the new file system.
Have a good time kind gerards and a happy new year!
I missed the replies, but yes, they show up perfectly out of the enclosure without the RAID card, even were pretty quick. I couldn't get the case open without a bit of bending, but I wasn't trying to spare the cases.
With the RAID card they only show up as 2.2TB. I suspect that the 3Tb WD and Hitachi versions will do the same, but have not tested them.
I think you could do that. You'd still be limited to 2.2TB per drive on the RAID card though and RAID 5 wouldn't be available with only 3 drives. My configuration is 4 x 2TB drives on the RAID card and then I plugged a 3TB drive into the 2nd optical slot that worked. I replaced it with a 500GB drive in there for day to day though since that was a faster drive and I didn't need the storage. I put it back into its external case and am using one 3TB drive as an external Time Machine backup.
Ideally, what is needed is a firmware update for the Apple RAID card to support larger drives like the Mac itself does. Shoot, I'd buy a new RAID card that did that.
I will ask it here to not create a new thread.
Is the 3TB HDDs problem related to RAID card or to Soft RAID in Mac Pro as well.
If I buy 3x3TB Hitachi and put ones in RAID0 inside Mac Pro with no RAID card installed should I expect the system see just a part of each disk (in stead of showing it as almost 9TB would bring me some 6.xTB?)
Rather than confuse and inject discussion of non-hardware RAID, and be clear there is Apple software RAID; and there is a commercial application/driver "SoftRAID" that is totally distinct (a program I recommend and have seen to be better - just read the "features" on their web site).
I'd have to say, do everyone a favor: Start your own thread: