MacPro Backup/RAID Solution

Both options are no backup at all.
Backup your data on external drives that are safe if your MacPro fails.
I would prefer an external Raid1 enclosure for two drives.

 

How are both options no backup? What are the odds of all 3 HDD's failing? Even if the PSU fails, alot of HDD's have protection from power surges now.

 

Of course everyone has different claims to a backup.

But on the long shot that you got an overvoltage all your drives in the Pro would probably fail.

I personally would not keep all the drives in the Pro.
Considering that a software Raid1 is everything but fast, i would exclude that option.

To backup my data with the drives I would do the following:

Keeping two drives in the Pro. First for the system and data, second one for Time Machine.
Then I would buy an external enclosure for the third drive.
That drive would store a bootable backup (Carbon Copy Cloner) of the system drive.

 

RAID 1 is a mirror, so anything on the first drive, is duplicated on the second. This is meant for availability (up-time) as it's real function (achieved via data redundancy, NOT backup. The reasoning is simple, as any error is also cloned. This is particularly an issue for user error.

Time machine is a backup, whether the drive is installed internally, or externally.

Setup 1 would work if the system needed to be available 24/7/365.

Setup 2 would work. Main drive, and a mirror (RAID1) used for Time Machine. A little paranoid for personal use, but viable. It has a price though. If you delete a backup copy accidentally (say house keeping, as the drive is getting full), it will be duplicated. Which is to say, it's GONE. It would be better to keep the TM drives separate, and just direct TM to use both drives. That way, if you make a mistake, the data's still on the other disk (assuming you didn't erase it from both).

If it's photo's/videos to be stored (irreplaceable data), you might just want to use the 3rd drive in an external enclosure, and direct TM to both the internal and external drives. This would help in case something odd does happen, such as a blown PSU.

Just a thought.

 

My take on this is to use Set Up 3:
1 TB System Drive
1 TB Time Machine
1 TB SuperDuper clone of System Drive, Weekly or Monthly

Or Set Up 4:
1 TB System Drive
1 TB RAID 1 Mirror of System Drive
2 TB Time Machine
1 TB System Drive SuperDuper Clone - Once per month

For TM is better to have a HDD bigger than the one you are backing up.

RAID 1 is for not loosing your Mac operational time.
Time Machine is to be able and go back to recover old states, files gone, errors...
Super Duper Clone - a clone of your HDD as when you clone it.

 

I'd say Set Up 3, as it's simple, and the usage seems to be personal use. So the uptime (availability) provided by a RAID 1 of the OS, isn't needed.

The only possible change, would be increase the capacity of the TM disk. But that can wait if needed, as the prices will fall, and larger models will ship. Which ever the OP chooses.

 

when does Apple come up with bigger HDD than just 1 TB ??????

 

Come on, if they charge $300 for a 1TB WD Black drive which is $85 on NewEgg how much do you think the 2TB drives ($230 or so at non-drug induced pricing) would go for and who would actually pay for it as a BTO option?