I really need to do that! We’ll have to get back to you on that I know how to back up my files (but I don’t.) My computer crashed Backup I don’t know where to begin I had it all done, then… This isn’t really the current version My Email got lost I thought I.S. backs up our computers John Beckett
The Only Sane People Are PARANOID
Who Are You? Some of Each
What We’ll Cover • Goal • No more major data loss • Items can be recovered as of a given date • Design • Working and reference sets – the key concepts • Tools (not as expensive as you might think) • Process • When am I going to do this? • Where does data go when it dies? • Special Challenges • Discussion
A Special but Common Case • That sinking feeling you get when the program crashes after you’ve put three hours into a critical document and the meeting is in 10 minutes. THE CURE • Save the document before you type anything into it. That means you’ve given it a name. • Now is the time to deal with duplicate names! • Habitually hit control-S anytime you pause. • Especially if somebody interrupts you
What Am I Protecting? Working Set Reference Set Things that accumulate, but are not changed once created (cumulative) Need to be protected from loss, but state at a given time is less important because they are not changed e.g. Picture collection, Previous Classes • Things I need, modify, and use on an ongoing basis (work in progress) • Archived according to my business cycle • e.g. My class materials are archived weekly and at the end of a semester, then folded into “Previous Classes”
What About Projects? A project is a type of working set • It has a beginning date • Work artifacts are involved • Video footage • Drafts • It is completed at some point • It has an end-product that may become part of your primary working set or your reference set Archive and Delete These
Mediathat work for me Working Set Reference Set USB drive Enough space (500+gb) to hold it all Size at a given price increases regularly Cost: New drive every 2 years ~ $1.00/week • DVD (4.7.7 or 8.5gb) • Non-rewriteable! • Enough space to contain all I’m doing currently • Next technology will be blu-ray • Cost <= $1.00/disk
Software Toolsthat work for me Working Set Reference Set (USB Drive) Copy project across Rename the directory if we keep multiple generations • Roxio Easy Media Creator Click’n’Drag Click’n’Drag
When Am I Going To Do This? Working Set Reference Set At the end of the Working Set Cycle Semester: when grades are turned in Include PDFs of grade submission screens from Datatel Project: when it has been presented and before beginning on the next • Friday • Preparation day, placing our secular responsibilities aside • Just before heading out on a trip • Like getting cash and arranging for pets to be fed If it isn’t backed up, it isn’t done!
Where Does Data Go When It Dies? Working Set Reference Set Cumulative set of information Discard old when it’s really irrelevant Remember: Space available at a given price increases over time But: Size of your projects may increase over time • CDs and DVDs are permanently stored on the spindles you buy them on • Label the spindle: • Time span • Subject • How to destroy? • Microwave for 3 seconds
Syncing • Master copy on laptop, shared (with password) • “Offline files” on desktop • Automatically sync’d when you plug in • Allows you to survive total loss of a laptop hard drive with minimal loss of data (probably) • Requires space on both drives • Warning: If you do something bad yourself, the sync function may propagate that error to the main drive, so save it before you plug in! • May require technical help to set up
What About RAID?Special note for techies & power users • Raid is not backup, since media are not removable • Raid is designed to improve the overall reliability of your hard drive • In return for additional cost and management responsibilities, RAID-5 gives you the ability to survive some (mechanical) hard drive failures • RAID systems below 5 are notorious for giving false sense of security while yielding little or no reliability improvement (JB’s opinion)
Special Challenges • Personal Files • Are you asking Southern to pay for archiving files of purely personal interest such as family pictures? • Media Projects • Footage and work files can be astonishingly large. An external USB drive, or part of one, may be needed to handle these • Content Management Systems and Social Networking Sites • These save information in a database, not as files – so you do not have a “working set” as such • e.g. Could you prove what/when a student turned in for their projects? • Identity Theft • Could your backup be stolen? Are security-critical files encrypted? • This is why I would be loath to use an off-campus backup system, especially if information about students was involved.
Ideas and Questions • http://computing.southern.edu/jbeckett