On Mon, Jan 06, 2003 at 01:29:09PM -0600, [EMAIL PROTECTED] wrote: > Suggest that you consider setting up a dump-cycle of 1 week, with a tape > cycle of three weeks (5 tapes/15 tapes for weekdays only, 7/21 tapes for > seven days-per-week cycles). This will permit you to send out a complete > set of backup tapes once per week (for example, sending out the previous > weeks tapes on Monday) and getting back the set of tapes from two weeks > ago in exchange. You then start reusing the three week-old tapes for the > current week. You will need to have three sets of tapes, in case it takes > more than a day to exchange the tapes with your offsite repository. > > Week In-Use Off-Site To-Be-Reused > > 1 Set3 Set2 Set1 > 2 Set1 Set3 Set2 > 3 Set2 Set1 Set3 > 4 Set3 Set2 Set1 > .... > > Because of the one-week dumpcycle, you will always have a complete set of > dumps of each file system in the off-site tape set. It will grow > increasingly out-of-date during the week, but storing your local collection > of tapes in a fire-resistant vault should reduce your risks to an > acceptable level. >
A slight variation of this is a 4th set. You may have a need to recover very recent files and a need to keep a set off site. By not rotating off-site until a set has aged a week, you can keep the most recent set in-house at the cost of a week's older set off-site. -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 4455 Province Line Road (609) 252-0159 Princeton, NJ 08540-4322 (609) 683-7220 (fax)
