Originally Posted by MichaelVest
100 gig HardDrive! I would fill that in a couple of days. I guess you really don't understand the problem.
I think it would take more than a couple of days. But 100gb is too small for many of us and for that matter one would even find it hard to buy that small of a drive now days.
The real problem in the backup procedure outlined in the original post is that it is not safe. He is backing up his critical data on a thumb drive and it sounds like he just backs up each time over the last backup. So if he ever gets a virus or some other problem where the data has gone bad, but he doesn't know it, then he has backed up bad data over his last good backup.
There is no shortcut or simplistic answer to backup. Having owned and operated a software company for over 20 years (till I sold it 7 years ago) I can speak from experience. Early on we had an accounting employee who would back up all of the accounting data each day onto a 8 inch floppy disk (things were smaller in the early 80s). Each day the person would back up the data over the top of the previous day's backup. Well the data had gone bad and was bad for about 6 months before anyone realized it and so there was no backup. Just bad backups. At that point we made a major change.
In a nutshell, the way you backup is to get a number of units of media which will hold an entire backup being made at one time. If you have to rely on swapping media, then you are asking for trouble.
You backup Monday, on Monday's Media
You backup Tuesday, on Tuesday's Media
and so forth for the week.
Now on Friday, in addition to Friday's Media backup, you make another backup which you name week1.
Now on the following Monday, you backup again using the Monday media and so forth.
On Friday you start a new media called week2
and so forth till the end of the month
At month's end, you backup as usual but add a new media called month 1.
At this point you have a backup for the last 5 days on separate media.
You have a backup for all of the weeks of the month, one for each week.
You have a backup for the month on a media.
Now you can begin recycling the day and week media, but the month media goes into storage.
At end of month 2 you start a new media called month 2 and so forth.
For extra safety, you make redundant copies of the weekly and monthly medias and keep the 2nd copy off premises.
Also, for even more safety, you can rotate the daily and weekly media between 2 or more sets so that for month 2 you are using new weekly and daily media, while the first month's media is in storage. Then you rotate out that block and bring back the first set.