In the past week, I have had two of my friends come to me with backup drive blues. In one case, their backup hard drive had failed, in the other case, they needed to know which backup drive to buy, probably because their old backup drive had failed. In both cases, I believe they lost precious data.
Over the past few years, I have had more than 5 backup hard drives fail on me. Interestingly enough, I have only had one internal drive fail in all that time. Most of the time, the actual problem is not the drive but the el-cheapo USB to SATA chips and logic boards used in backup drive housings. Two of my failed drives worked fine once I plugged them into the SATA ports on my Mac Pro - one is still running fine 1 year later. The remainder had the click-click beep of crashed heads because the drives had been dropped or otherwise manhandled.
Here are a few things I do to ensure that I never again face the backup blues.
Use multiple backup drives
I purchase those 500GB WD Passport drives, the playing card pack sized, very slow, portable hard drives that are powered off the USB port. I buy them because they cost $99, have no power cords to lose; and I buy a lot of them. Each computer I have that has 500GB or less storage on it has one of these as a Time Machine backup drive. I also drag and drop my home folder onto a second one every month or so. So my data is now in 3 places, on the computer, in Time Machine and manually on a third.
For my machines that have larger storage, I use larger USB drives, also set up as Time Machine drives. One of these is internal as its controller failed but runs just fine inside my Mac Pro. And I copy swathes of my data onto a series of the smaller 500GB drives, admittedly not frequently enough. Once again, my data is in 3 places.
Use multiple computers
Since I have a Mac Pro and a MacBook Pro, I have the advantage of also duplicating my data on 2 machines. Once again, a quick drag and drop over the network keeps the two in sync. Of course, since the laptop has a smaller drive, not everything goes across.
If you do not have two current computers, grab your old clunker out of the closet, install some big hard drives and use that. If no old clunker, use your partner's computer. If no partner, see if your employer will permit you to use up space on your work laptop.
The cloud
At this stage I do not yet use the cloud for backup. I have a Dropbox account that I use for some stuff and an iDisk at MobileMe that I use for others. Some people use BackBlaze, Mozy, Carbonite, iDrive or other online backup products, but I cannot recommend them as I do not use them. And a lot of people like me who have web server accounts use the excess space for backup, thanks DreamHost.
The big issue with online backups is the time it takes to do the initial backup and the time to do incremental backups. Its not the cloud server's fault, these folks have heaps of bandwidth, its the ISP's fault for not providing sufficient, or at least burst, upload bandwidth to consumers.
Things you should never do
Never, ever, use a backup drive as primary storage. The number one cause of the blues in backup drive blues is because people put all their photographs on a single backup drive and only on that drive, and it fails. If you have to use an external drive because your internal drive is not big enough, do yourself a favor and buy a bigger internal drive; or make sure your data is on at least 2 external drives.
Don't leave your backup drive on and spinning all the time. This is not a problem for the drives themselves but these flaky controllers seem to burn out. Backup drives are designed to be used, then left off until used again.
Don't install the software that comes on these USB drives. Never do this! Ever! The software is buggy, annoying, usually incompatible with other manufacturers stuff, slows your computer down, and probably reports back to the mothership. Your operating system can handle these drives just fine without it.
Don't spend money on those disk recovery services. Chances are, they will plug the drive into a new case and it will just work. Or they will replace the heads and it will still not work. Its a lot cheaper to backup to multiple drives than it is to get the data back after the fact, if at all.
More than one basket for eggs
The first rule of backup is that the data exists in at least 2 places, on the primary drive and on the backup. That way, if either drive fails, and it will, you have the data on the other. I have it in 3 places in case 2 fail (it has happened to me).
The second rule of backup is to do so regularly and in multiple ways. Time Machine is brilliant, but a drag and drop every month onto an $99 USB drive is worth it for the peace of mind.
I don't care which backup drive you buy, just get more than one. They really are cheap, and your precious data is not worth losing.
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Aside: Western Digital, please get rid of that WD SmartWare virtual CD. Its rubbish, drives your customers nuts every time they plug in their drives (especially Time Machine users) and anyone who actually installs the software has problems.