Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Get up to 16x more storage and 2x the speeds of the original drive
Apple MacBook 12-inch, Mid 2017 (Current Model)

$1599 Only $999

1.3 GHz i5, 8GB, 512GB SSD
Apple Refurbished, Factory Sealed, Apple 1 Year Limited Warranty

Backup Speed Cloning 245GB to a Disk Image

Last updated 2013-09-21 - Send Feedback
Related: backup, Carbon Copy Cloner, cloning, hard drive, NAS, SSD

See also How to Safely Transfer Data or Verify Backups and also general backup strategies and how-to.

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.

Cloning time in minutes to clone 245GB as a disk image various solutions
128GB Memory in iMac 5K

Up to 128GB for 2019 iMac 5K!
Up to 64GB for 2015/2017 iMac 5K

Save nearly 50% over Apple pricing
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 21 hours unless noted. Certain deals may last longer.
$2797 SAVE $600 = 17.0% Nikon Z 7 Mirrorless in Cameras: Mirrorless
$2798 SAVE $400 = 12.0% Sony a7R III Mirrorless in Cameras: Mirrorless
$3498 SAVE $1000 = 22.0% Sony a9 Mirrorless in Cameras: Mirrorless
$898 SAVE $100 = 10.0% $164 FREE ITEMS Sony DSC-RX100 VA in Cameras: Point and Shoot
$1879 SAVE $1071 = 36.0% ZEISS 15mm f/2.8 Distagon T* ZE in Lenses: DSLR

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__