Question

Which non-Apple drives work reliably with the latest Mac Pro RAID card (early 2009 Nehalem)? I 'm interested in drives that are >= 1TB in size.

Answer 1

I'll let you in on a little (not so) secret.

An "Apple" drive is just a drive from another brand, with an Apple sticker stuck over the top. So as far as reliability goes, just choose one from a recognised manufacturer (Western Digital, Seagate, Maxtor, etc) and you won't have any issues.

Personally I'm using WD Green drives.

The only thing to be wary of is that some controllers (I don't know about apple in this case, but it wouldn't surprise me given their history) will refuse to work with off-brand drives. I had a RAID controller from an old dell that would not work with anything except Dell drives, even when the other drives were identical, just with a different part number (same manufacturer, but non-dell branded).

That said, there's only one way to find out.

Answer 2

Even though Apple uses major brand drives in their systems, they may contain custom Apple firmware. I personally would not use non-Apple drives on any Apple hardware raid. You don't want to risk an intermittent issue cropping up because of a firmware incompatiblity. I've seen some Apple hardware RAID cards work with non-Apple drives and then suddenly have intermittent failures after a bit of use. If you want to use non-Apple drives, then invest in a third party RAID card that does support standard drives.

While many hardware RAID vendors do limit compatibility with some drives, I feel it is wrong of Apple to limit it to only their outrageously expensive ones.

Answer 3

Alexander, search the various forums for people using the Mega RAID cards supplied by Apple for their XServe G5s. I believe people were still reporting issues even with the RAID card for the early 2006/2007 MacPros as well. Some people can get them to work and others cannot. We had them working for a while and then the RAID settings kept disappearing from the RAID card. We tried other Mega RAID cards, motherboards, and hard drives, etc. We found only the Apple branded drives would work correctly all the time. We even used identical drives minus the Apple branding and those drives did not work. Only difference was the Apple firmware on a drive. Up until that time we would install non-Apple drives on Apple RAID cards. Now we need to do extensive testing and research before doing so anymore.

It seems the 2008 MacPro Apple RAID card may work fine with non-Apple drives. We've been running a machine with them for a few months without seeing problems yet.

Always check the manufacturer's recommendations and always search forums to see if anyone is having issues with a particular configuration is not covered by the manufacturer's recommendations. Then make sure you perform your own testing before relying on it for a critical system. Just because it unofficially worked in the past does not mean it will work on newer hardware.

Answer 4

Be aware that most drives with a capacity > 1TB are so called desktop drives. This means they are specified for 8h/5d/week usage. You may even loose warranty if your drive usage goes beyond that. Since today it is very unlikely that your computer is running "only" 8h a day, for no more than 5 days a week, I recommend going for server grade drives. Yes, they are a little more pricey. (Like the ES series from Seagate.)

If you compare the failure rates of server and desktop drives you need to calculate in the different usage schemes to compare correctly. (Desktop 8h/5d/w, Server: 24/7/365) Server grade drives have substantially less failure rates.

Of course you should have current backups of your data at all times! (If it is not destroyed by the fire, then the extinguishing water will.)

If you intend to run your drives a RAID 5 you may want to get server grade drives with special RAID firmware. This is different in timing responses to the controller and will get you better reliability as well as performance.