Can I have 2 Time Machines for 2 backups?

Question

I have an external hard drive that I use for my time machine. Recently I've been having some problems with my iMac that are hard drive related. I wasn't able to repair using disk utility and had to erase and reinstall Snow Leopard and then transfer everything back from time machine.
After this I realize just how fragile this all is. I have many photos and videos of my family from years ago and was relieved that I had everything backed up. Hard drives are so inexpensive these days, I feel it may be wise to have another backup in the unlikely event both hard drives were to have problems at the same time.
Can I have two Time Machines? If not, what are my options?
Thanks for any suggestions on this topic.

Answer 1

Yes, but not simultaneously. You can switch the desired backup drive using TM preferences, but TM cannot backup to two drives concurrently. However, I would suggest not using TM for your second backup. Instead consider making a bootable clone on the second drive. You can then use a third-party backup utility to incrementally update the clone. Because this software is running independently of TM you can have both a TM backup and a third-party backup. With TM backing up hourly you can set the second backup schedule to backup weekly and/or monthly.
If something does go amiss with your main system drive, then you can boot from your clone in order to restore function to the main drive.
To avoid using up space on the TM drive be sure you add your second backup drive to the TM Exclude list.
Basic Backup
Get an external Firewire or USB drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. (Note: Most PPC Macs cannot be booted from a USB drive.) You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Retrospect Desktop (Commercial)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. Carbon Copy Cloner (Donationware)
6. SuperDuper! (Commercial)
7. Intego Personal Backup (Commercial)
8. Data Backup (Commercial)
9. SilverKeeper 2.0 (Freeware)
10. MimMac (Commercial)
11. Tri-Backup (Commercial)
Visit The XLab FAQs and read the FAQ on backup and restore. Also read How to Back Up and Restore Your Files.
Although you can buy a complete FireWire drive system, you can also put one together if you are so inclined. It's relatively easy and only requires a Phillips head screwdriver (typically.) You can purchase hard drives separately. This gives you an opportunity to shop for the best prices on a hard drive of your choice. Reliable brands include Seagate, Hitachi, Western Digital, Toshiba, and Fujitsu. You can find reviews and benchmarks on many drives at Storage Review.
Enclosures for FireWire and USB are readily available. You can find only FireWire enclosures, only USB enclosures, and enclosures that feature multiple ports. I would stress getting enclosures that use the Oxford chipsets (911, 921, 922, for example.) You can find enclosures at places such as;
Cool Drives
OWC
WiebeTech
Firewire Direct
California Drives
NewEgg
All you need do is remove a case cover, mount the hard drive in the enclosure and connect the cables, then re-attach the case cover. Usually the only tool required is a small or medium Phillips screwdriver.