To: Dave Hanson who wrote (1217 ) 6/8/1998 6:34:00 PM From: Sean W. Smith Read Replies (2) | Respond to of 14778
Should preface this by saying I agree with Peter's point that ideally, one would have both backup solutions. "4 Gig Travan Tape - $30 4 Gig Drive - $200 no comparison here..." Well, again, that depends. I can get a fast, cool 7 gig EIDE drive that will work in _any_ modern PC for less than just the drive and one tape--wheras the travan has to be installed in the PC I'm trying to restore. Granted, if you have gigs and gigs of data to backup, tape becomes much cheaper. For me, who just backs up my data and OS partitions, this isn't the case. Its just not a 1 for 1 comparison. If I were to do the HD backup thing at a minimum I would need 3 drives. 1 to use for todays backup. 1 rotated in my local safe. 1 in a bank vault. 1 Tape Drive + 3 Tapes is still much cheaper than 3 HD's. The difference gets larger as the #'s increase. Remember I am not psuhing for tape. Tape is only one option, removable disks, and CDR's are also excellent choices depending on your individual needs and tolerances. This is true only if you backup the entire drive as one partition. If so, than this is right. But in most cases, it's the data and the OS that really need backing up. Data is key. All agree here.... Well this gets into a backup strategies for which their are many. There are clearly differences between disaster recovery and backup. A couple of things to think about. Why is the OS so important? - I can install Windows 95 in 45 minutes and it will take 2 weeks to install and configure all my software. OS doesn't seem very important in that perspective. If you use traditional backup software. You have re-install the OS to restore the tape backup.... This leads you to something like Drive Image which is great for disasters but doesn't do incremental backups well. Which leads to large data sets which I used in my example.Again, a fair point given your configuration. Since I configure differently, I can easily keep 6 or more images of my boot partitions all on the extra hard drive, and try each of them out in < 5 minutes. Again this doesn't interest me. A backed up OS without my apps is useless. It takes far more time to install and configure and install all the apps than to configure the OS. Have you ever had a failure and had to restore and re-install using this system?? How long did it take??Is this reasonably convenient on modern travan drives? I must admit, I'm not very familiar with modern travan systems. I reckon they works much better than the crappy little tape drives I recall from the early-mid 90s. They have improved dramatically from an ease of use, reliability and speed perspective.A fair point. I've never had a problem, but then I've only had a few minor drops, and I gather tapes are built to withstand pretty high g forces? yeah, they do great up until the cases crack. rember removable disks and CDRW's are useful as well.You grant that HDs are faster, and I would certainly grant that speed isn't the primary factor. I would ask, just how quick are 4 GB tape drives these days? (BTW, is it 4 gigs uncompressed?) 25-30M/Min with compression on a SCSI TR4. 4 Gig uncompressed.By extra convenience, I mean things like accessing the data on the spare drive easily on another system, using advanced bios setups to access them given a failure and make backups on the fly (i.e. Fastrack RAID), and similar permutations They make all flavors of devices internal/external, SCSI, IDE, and Parallel Port versions. I don't see how install an IDE HD on another system is easier than isntalling an IDE Tape. Its certainly not easier than a parallel port/SCSI external Tape/Jaz/SyJet/Etc....I gather you've had good luck with tapes, and know your way around them. Do the drives require much TLC and replacing? Yes, Tapes do require TLC and replacement. Other removable media more robust in this category...Again, by having multiple partitions. I have a 11.5 gig drive, with compressed data and OS partitions of no more than 5-600 megs apiece. That gives you a lot of room to "play around" without deleting anything. OK, thats fair. See my point about what to backup. And you have this drive on removable rails and take it out of your machine every night???Jaz and Syquest often can do this (albeit at slower performance), agreed reliability issues are definitely overblown. (Another reason to have a larger rotation pool, 1 of anything can go bad). cross machine compatibility is excellent on these devices. Again you can get EIDE, SCSI, Parallel. All are very portable. Personally I own 3 Zips, 1 Jaz, and a Syquest 135 all Parallel port and have used them on HUNDREDS of machine with 0 problems!Sincere thanks for the rejoinder. Since you are obviously both much better versed with tape backup than I am and sold on it as a reliable solution, I (and others, I'm sure) would welcome any further thoughts you have on the matter--best configurations, best brands, your own backup routine, etc. that you'd care to share. You may well convince me to give tape another try. :) Remember I am not pushing tape. I would recommend almost anything over the previosuly recommended solution. I beleive very strongley about it. Have 1 backup device of any kind is not wise. True removable technology gives you an opportunity to increase those odds by a factor of N while maintaing robustness and keeping cost to a minimum. Points to consider if you use this.... A. How many spare HD's do you have. more than 1? B. Is it truely removable? C. Do you keep it in a fire safe? D. Do you keep one offsite for added security? If you answer no to any of those questions you should rethink your backup strategy. I would be glad to share more on my methods in a later post.... Thanks for the replies.... Sean