iMac External Storage Recommendation

scott216

macrumors newbie
Original poster
Sep 14, 2011
15
0
NJ
I have a late 2007 Mac Pro that I want to replace with a 27" iMac. One reason for upgrading is I have a bunch (2TB) of family videos I need to edit in iMovie. Currently iMove brings my MacPro to it's knees, so I haven't done anything in a while and I need to catch up. I also use Aperture a lot. Everything else I do on my Mac is low performance in comparison. I don't do any gaming. No 4k video, just HD.

I'm leaning toward an iMac with 500GB SSD and external thunderbolt storage. 3-4TB should be more then enough. I'm looking for some advice on what to get for external storage.
 

hfg

macrumors 68040
Dec 1, 2006
3,577
281
Cedar Rapids, IA. USA
I use a Promise Technology Thunderbolt Pegasus J4 with 4 ea. 7200 rpm 1TB 2.5" HGST disk drives. The drives all appear to OS X as separate drives, so you can use Disk Utility to create RAID-0, RAID-1, RAID-10, JBOD (Concatenate) or separate disks. If you use all 4 drives as a RAID-0 for speed, you have a 4TB drive with SSD like speeds (be sure to keep a backup). It is small (size of a Mac Mini), quiet, and cool running.

RAID-0 DiskTest Speeds
config ....... Write / Read MB/s
1 disk ....... 115 / 129 (non RAID)
2 disk ....... 250 / 258
3 disk ....... 345 / 375
4 disk ....... 501 / 507

http://www.bhphotovideo.com/c/search?Ntt=promise+technology+pegasus+j4&N=0&InitialSearch=yes&sts=ta




-howard
 
Last edited:

joema2

macrumors 68000
Sep 3, 2013
1,591
797
...I have a bunch (2TB) of family videos I need to edit in iMovie....I also use Aperture a lot. Everything else I do on my Mac is low performance in comparison....leaning toward an iMac with 500GB SSD and external thunderbolt storage. 3-4TB should be more then enough. I'm looking for some advice on what to get for external storage.
I have a 2013 iMac 27, 3.5Ghz with 3TB FD and 8TB (6TB formatted) Pegasus R4 in RAID 5. It works very well for video and photo editing using FCP X, Lightroom and Photoshop CC.

The problem with RAID 0 is you lose any single drive in the array -- you lose it all. Provided it's all backed up regularly, I guess that's OK, but you'd have to budget for, spec and configure the backup storage.

The 512 SSD iMac 27 can be faster than the 3TB FD version in some narrow areas. In general I prefer the larger storage of the FD. If you know ahead of time you're going to have fast external Thunderbolt storage, I guess the SSD version might be better.

The problem is even a RAID 5 disk array should be backed up. RAID 5 only protects you from a single physical drive failure, not firmware, filesystem or user error. Whatever your internal and external storage config is, you must budget and plan for all *that* being backed up. In my case I use a 6TB WD MyBook Thunderbolt Duo to back up the Pegasus R4.
 

scott216

macrumors newbie
Original poster
Sep 14, 2011
15
0
NJ
Thanks for the info. I do plan on doing something different for backup.
 
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