4 Week cycle tape backups

[Kerplunk]

We have a 4 week cycle tape backup schedule here at work, but im curious to know how you would perceive this.

Okay, so this is how it goes:

Monday Tuesday Wednesday Thursday Friday
Week 1
Monday-1
Tuesday-1
Wednesday-1
Thursday-1
Friday-1

Week 2
Monday-2
Tuesday-2
Wednesday-2
Thursday-2
Friday-2

Week 3
Monday-3
Tuesday-3
Wednesday-3
Thursday-3
Friday-3

Week 4
Monday-4
Tuesday-4
Wednesday-4
Thursday-4
Friday-4

At which point would you withdraw a tape (s)? My understanding is that on the last day of the month all those tapes are in effect that months backups, Okay the part that I dont understand is do you withdraw all of them ? or do you just overwrite them? (assuming you dont!).

If anyone has experience with this, then i'd like to hear what you do or at least any idea.

 

[Kerplunk]

Thanks for all the informative replies guys.

Question - why would you need a backup from 3 months ago, when you have one from a week ago at hand? Would you ever need to go back that far?

This is the very reason, why I posted this thread. A user here wanted to go back to June (in November) and I thought that id I just looked at which backup tape was created on that day it would be there. But no.

From what I can see on our magical little Backup Exec, you seem to get a months worth of media information 1 - 31 of a month (depending on month).

Anyway, The question I was asking myself is how would this data of been kept/backed up if Every 4 weeks the tapes had been overwritten.

Okay, some nub might of made a drastic error and needed to go back but didnt notice until just now? :/

So, are people here sayign that On 'fridays' you should withdraw the tape and store them?

Perhaps im missing something blatently obvious but I dont see how you can have all data backed up and refer back to a specific file from January 06.