↝ OWC / MacSales.com... ↜
↝ diglloyd Deal Finder... ↜
Buy other stuff at Amazon.com...
1.3 GHz i5, 8GB, 512GB SSD
Apple Refurbished, Factory Sealed, Apple 1 Year Limited Warranty
Backup Speed Cloning 245GB to a Disk Image
Related: backup, Carbon Copy Cloner, cloning, hard drive, NAS, SSD
Cloning volumes as a backup strategy is attractive as a backup strategy, but as discussed on the Cloning to a NAS page, there are some wrinkles (as compared to cloning to a local volume). So one solution is to clone to a disk image, which allows preservation of the full file structure.
Cloning performance to various solutions
This graph shows the relative speeds of making a clone to a disk image.
The fastest possible scenario is cloning from a fast striped RAID of SSDs to another striped RAID of SSDs—nothing is faster than that.
Another scenario is cloning to another Mac sharing its drives via file sharing, either an SSD or a hard drive. Of course access to either must go over the gigabit ethernet link, so that affects performance. Still, a file-shared fast SSD is clearly faster than a file-shared hard drive.
The slowest solution turned out to be the ioSafe NS2 NAS. Which demonstrates that a Mac with file sharing enabled makes a darn good NAS by comparison, and a Mac can use a mirrored hard drive solution for fault tolerance too. But of course a Mac is not firesafe and waterproof and doesn’t have all the workgroup features found in the ioSafe N2.
Bottom line: the ioSafe N2 NAS is no speed demon, but if the goal is protection from fire and water, then one can sleep soundly at night. Also, read speeds tend to be much faster than writing, and this cloning test is dominated by writes.
Time in minutes to finish the clone.
Up to 128GB for 2019 iMac 5K!
Up to 64GB for 2015/2017 iMac 5K
Save nearly 50% over Apple pricing
$719 SAVE $430 = 37.0% Apple 12.9" iPad Pro (Mid 2017, 512GB, Wi-Fi Only, Gold) in Electronics: iPads and Tablets
$5699 SAVE $600 = 9.0% Apple 15.4" MacBook Pro with Touch Bar (Mid 2018, Space Gray) in Computers: Apple Macs
$2500 SAVE $300 = 10.0% Apple 15.4" MacBook Pro with Touch Bar (Mid 2018, Space Gray) in Computers: Apple Macs
$1000 SAVE $500 = 33.0% Westone W80 Eight-Driver True-Fit Earphones with ALO Audio and M… in Electronics: Audio