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Is Time Machine Enough?


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My MacBook's hard drive died back in December 2006. And, my first generation Mac mini (the old G4 model) decided to give it up around August of 2007. Since Leopard didn't arrive until October 2007, neither of these incidents could take advantage of Leopard's Time Machine.

Since then, I've actually had to use Time Machine twice to recover files that weren't backed up elsewhere. And, I tested a full restore on my MacBook by wiping out the drive (on purpose) and then restoring from a Time Machine backup. This is not enough testing to fully trust the process. On the other hand, Time Machine is batting 100% so far. My iMac and MacBook each have their own external drives dedicated to Time Machine backups. And, each one also has a second different external drive that I use to manually backup files.

One thing I realized I had not done since my Mac mini died was prepare a bootable external drive for my Intel-based Macs. So, I booted from the Leopard install DVD and built one. If you want to create a universal bootable external drive (Power PC or Intel), you can find information on this Apple support page:

Mac OS X 10.5: Creating and maintaining a bootable "universal" external disk

The next thing I did was check on the current state of image backups for OS X. This has not seemed to change since I took a look a few years ago.

Carbon Copy Cloner: It is fully functional shareware. The suggested donation on Mike Bombich's donate page is $10. It is compatible with Tiger and Leopard and supports incremental backups in addition to imaging.

SuperDuper!: Its availability is kind of interesting. There is a "lite" version (although it is not called that) which is free and provides drive cloning. If you register the software by paying $27.95, other features are enabled (including scripting).

Carbon Copy Cloner and SuperDuper! do more than just disk imaging. And, if I ever move beyond my simplistic (though functional for me) backup scheme, I would defintely spend more time looking at these two applications.

The final backup piece I took a look at were online options. I was not very happy with my ".Mac" service when I had it and did not renew it or buy into its successor MobileMe.

dotMac: I took a quick look at this Open Source response to ".Mac". It looks interesting and my concern has nothing to do with the project's technical aspects. My concern is that if I use it with my likely server target (my website's hosting service), I will exceed my bandwidth allotment simply by backing up my digital photos.

Jungle Disk is a $20 utility that uses the Amazon S3 Service (separate monthly recurring charges) for storage. There is also a Jungle Disk Plus Service that costs $1/month (per desktop) and provides additional services such as web-based access to files. Jungle Disk was recently acquired by Rackspace. The press release states that new and existing users will not see any changes. I've heard that enough times to adopt a wait-and-see attitude. And, I have some reservations about Amazon's S3 service stability.. That said, Jungle Disk + Amazon S3 seems like a reasonable way for an individual like me to implement offsite backups.

So, is Time Machine enough? It is probably a good starting point for most of us. I use it in combination with additional external drives and flash drives (for current work files) and burn multiple copies of DVDs for things like family photos and video clips. The hope is keeping a live migration of files (especially family photos) from one generation of external hard drives to the next as well as optical storage will help them survive over the years. So far, this has worked since I got my first digital camera in 1995 and started burning CDs, writing floppies, and copy files to new computers as they replaced old ones.

I generally don't mind reinstalling applications. So, restoring an image to become operational is not nearly as important as keeping two or more computers in running condition so one can be used while the other is restored. The move from client-side software to web services like Google Docs, Zoho Office Suite, and Evernote has also reduced the need for application installation for full operations. An Internet connection and web browser gets me to about 75% of operational readiness for daily work.

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Read More Entries by Todd Ogasawara.

8 Comments

thank you for this post.

Tom_E said:

Well, TimeMachine is good as long it works.
There are a bunch of simple failure reasons where TM will fail w/o further diagnostic messages:

- The backup filenames get too long. The backup prefix takes another 100 characters from the tight 1024 path length limit, so it is possible you can not use TM for your backup (seen on one machine)

- When the backup disk fails, TM apparently does not report "dad-save" enough there is no more backup going on. Seen with my dad's laptop where the backup disk was corrupted for whatever reason 3 months ago and didn't backup since.

- when the main filesystem gets corrupted and any file cannot be read, TM backup will abort with an generic "Backup failed" message instead of backing up the remainder. Happened on my powerbook with a recently trashed disk.

- when you reboot during an backup (System update..), you get an very alerty "backup failure" messages + state. IMO that trains users to disregard real issues.

Oh, and don´t use drives for backup that were previously imaged using ASR or Carbon Copy Cloner without reformatting. Cloning makes TM believe that the target and source disk are identical. Happened after cloning the Tiger volume to an external disk before upgrading and then, after an Leopard upgrade, using the external disk for TimeMachine.

IMO that's quite a list of oddities for one year handling half a dozen machines.

Jayce said:

Hi,

on my side, i use an external disk with two partition, one for TM, the other one for Tri-BACKUP.
Two seat belts for my paranoia. And yes, i also have backups of backups :-)

Tri-BACKUP's copy is bootable contrary to TM. When my iMac's disk died 1 month ago, i just replace the disk, boot on the backup, and redo the backup from my external disk to the internal one, 2 hours later i was back to my stuff!

I use psync to back up nightly to another disk inside my Mac Pro. Works without any intervention on my part and works really well. Bootable, of course, as well.

PetieG said:

Time Machine just worked flawless on an executive client of mine... He hasn't run it in a month so the faulty drive is out at a DR place... Looks good so far and his machine is back as it was one month ago. A well respected Mac Tiger client of mine said it is the one compelling reason to go to Leopard (i think there is more personally)... I personally use TM on my MBP15 and also use JungleDisk w/ Amazon S3. While Time Machine is great one lightening strike to your house and not only your Mac but your TM drive would be fried... I recommend offsite as well as TM just to be safe.

PetieG said:

Time Machine just worked flawless on an executive client of mine... He hasn't run it in a month so the faulty drive is out at a DR place... Looks good so far. A well respected Mac Tiger client of mine said it is the one compelling reason to go to Leopard (i think there is more personally)... I personally use TM on my MBP15 and also use JungleDisk w/ Amazon S3. While Time Machine is great one lightening strike to your house and not only your Mac but your TM drive would be fried... I recommend offsite as well as TM just to be safe.

Sven said:

For an online solution have a look at http://www.crashplan.com/
You essentially buy the software with which you can backup to other machines or sites. Additionally you can buy server space too. I've not used it, but I've heard some good things about it. Better than http://mozy.com/mac which has had reports of bad backups when restoring.
The problem I have is that if I were to back up my photos, mp3s, and other documents online, I'd spend quite some time uploading everything. Hopefully though, once done, only the differences between the backups will need to be stored.

So, what is the best solution? Buy an external drive and backup to that and hope it doesn't fail? Or pay for some remote space and spend some time uploading?

As an alternative to Super Duper and CCC, take a look at ChronoSync - http://www.econtechnologies.com/site/Pages/ChronoSync/chrono_overview.html. Not only is it a highly flexible backup app, which I use in conjunction with Time Machine, it also doubles as a synchronisation tool that enables me to maintain identical home folders on both my Macs.

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