Backing up user files
Here’s a scary statistic for you: The Mean Time Between Failure (MTBF) on hard disk drives is generally reported by manufacturers as 300,000 hours or more. That means that, on average, a disk will fail after 300,000 hours of use. That sounds like a long time–300,000 hours is 12,500 days, or about 35 years on average. Not so bad, right? The scary part is that I’d estimate there are at least 50,000 spinning disks on campus right now, which means that there are probably multiple disk failures on campus every day.
We recently had a hard disk drive failure in a customer’s machine that was not backed up. She lost years of stored email, along with a database and other documents which took uncountable hours to create. We’ve all heard similar horror stories, or lived through them, yet we still seem to make the same mistakes.
Some people back up their files to writable CDs or DVDs; removable media are cheap and it just takes a couple of minutes, right? That’s my backup scheme on my personal machine at home. Now ask me, how long has it been since I actually backed up my home machine? (Answer: No idea, but it was at least 6 months ago, probably a year or more. But thanks for reminding me–I’ll go do it tonight.) For backups to be effective, they really need to be automatic and invisible to the user.
Fortunately, the campus has an inexpensive automated system: UC Backup, which is based on IBM’s Tivoli Storage Manager. For just 30 cents per gigabyte of data stored, you can install the TSM client on your machine and be protected in case of data loss. The office of the Vice Chancellor for Research provides an additional subsidy; researchers can get their data backed up for only 15 cents per gigabyte while funds allow. (See UC Backup’s page for information on signing up for the service and the research subsidy).
LSCR would like to see all of our customers’ files (both staff and faculty) regularly backed up by UC Backup or a similar system. I’d recommend the same for all computer users in L&S departments. The cost is low and the benefit is large; our institution has a huge liability out there due to irreplaceable data not being backed up. We’ll be contacting our departments to encourage them to sign up all their users with UC Backup, if they’re not already. (Over half of our administrative staff users are already being backed up through UC Backup, but for our faculty it’s a very low percentage).
Side note: The campus-wide IT Strategic Plan identifies backup as a critical issue, and sets a goal of having 80% of faculty and staff backed up by July 2006. [Obviously the plan needs some updating.] Personally, I think that the current UC Backup model doesn’t put the campus in position to accomplish this goal; the low cost is OK, but the administrative overhead required to manage the billing, even for that small a charge, creates a barrier significant enough to keep many departments and individuals from rolling out this professional backup service. I would like to see the service be free of cost to the user up to some reasonable threshold of data storage; 10GB or so. It’s really not worth generating hundreds of BFS transactions for $1.50 each.
