On Sep 21, 2008, at 11:07 AM, Al Poulin wrote: > snip
> I agree, but I would like to see more discussion here of Time Machine > and Time Capsule. It seems that this technology is not yet fail- > safe. There have been recently, comments about "Time Machine" problems [various]. I.E it's NOT an infallible fix for the Backup problem. > Time Machine may be more robust when hardwired than with Time > Capsule; is this the thrust of the experience to date? > Time Capsule = wireless connection?? > And a clone > via Carbon Copy Cloner or SuperDuper is more robust than what you get > with Time Machine; true? That is my thinking. > > As for RAID 0, I see: > http://en.wikipedia.org/wiki/RAID > saying: "RAID 0 (striped disks) distributes data across several disks > in a way which gives improved speed and full capacity, but all data on > all disks will be lost if any one disk fails." > I.E. Productivity (speed) improvements, but no 'Backup' advantage. > So, for back up purposes, I see Time Machine/Time Capsule as being > handy for recovering user files for whatever reason, especially if bad > things happen between cloning events. It seems to be a "Whole Machine", Version Control system -- Being touted as a form of 'Backup' which it is NOT. > But the safest back up is a > clone to an external hard drive that is disconnected when not actually > cloning or recovering. > > More discussion please? > > Al Poulin "Backup" is to allow 'Disaster Recovery'. Type of disaster Recovery Method Power disconnect Restore Power, re- boot. IF the software you are using is reasonably designed --No Problems. Munged data file Retrieve data from previous copy [re entering data, as necessary to bring up to date]. Time Machine, retrieve previous copy [Where Time Machine works well]. HD crash Replace HD, restore from Time Machine. Or Replace HD, restore from System Backup MB died Replace MB, Hopefully, that's all that is needed. These are all Single Event failures. Think about, Fire Damage, Vandalism, Etc. When there are 'Multiple Failure Events' at the same time, then things get interesting. In another Life, when asked about "Backup" strategies, my recommendations were ------- [This was back in the days of floppies] Full System Backup, whenever there was a major change in software, or every 6 months, whichever occurred sooner. DATA, Backup the DATA files from an application as often as needed to let you feel comfortable about the effort needed to 'get back to normal'. For EACH of these 'Backup Sets', System & Data, there should be a MINIMUM of 3 complete sets of Floppies [Data Cartridges, CDs, what ever method used] These 'Sets' being rotated, re-using [overwriting the oldest]. [When using 'Data Cartridges', do NOT count additional entries on the same cartridge as separate sets. Use another cartridge.] ************************************************** MISSING INFO. *********************************************************** Storage of the 'Backup Data Set' --- Needs to be somewhere OTHER than with/ beside/ next to the 'backed up' system. I.E. at work, take them home for storage, at home, borrow space for a storage box in the Brother-in-law's garage, etc. --- Someplace where a 'local' disaster won't destroy your "way back to 'normal'". Remember, all this is the Insurance Premium against disaster. ************************************************************************ ******************************************************** And yes I have fought with 100+ sets of 'backup floppies'. [VERY time consuming, and irritating. BUT that was the technology available at the time.] You may be thinking 3 sets of everything? That's overkill --- IF all goes well, and you don't ever run into any need, then yes, it is 'overkill'. But consider this 'not too farfetched scenario' You have a problem! Grab the most recent 'Backup', and start restoring ---- Glitch is still there! research problem, most recent 'backup' is 'foobar'. Simple, get the next one back --- Still grinched!!!--- more research --- Hardware problems [ Floppy drive read head scratching the floppy, Data Cartridge Drive "Eating" the tapes] Only one more 'Backup' left to try. At this point, my advice would be to find another system (beg, borrow, friend, foe, however you do it) and make a couple of copies of all of the media (Floppy, Data Cartridge, whatever) that that last 'Backup' copy resides on. Otherwise, you stand the chance of destroying any possibility of recovery. [That will never be the case if you are using 'Time Machine', Right? ---- Right, as long as there are NO PROBLEMS with 'Time Machine' {Different Basket, still only one egg}] Backup Strategy is a very 'personal' thing. What needs to be 'backed up' and to what extent. You have 'Fallen into' being the 'Family Repository' for 'Family Pictures' --- The next question is, how long do you survive if they are all lost? Get the picture? You have all your 'Tax Record Information', on-line. What sort of disaster is it to recover enough information to satisfy the IRS that you weren't making BIG $ three years ago? Again, Get the picture? You WON the election, and are now Treasurer of 'Elks', Your Church, The local Republican Party, whatever. ------- What sort of problems will 'recovery' be for those records? Chuck D.. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. 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