hans...@gmail.com wrote at about 09:35:49 +0700 on Friday, March 11, 2011: > On Fri, Mar 11, 2011 at 3:46 AM, Michael Conner <mdc1...@gmail.com> wrote: > > That is good to know. Actually things are a little better than I thought, > > the spare machine is Dell Dimension 2400 with a Pentium 4, max 2 gb > > memory. So I guess I could slap a new bigger drive into it and use it. My > > basic plan is to get backups going to one machine and then dupe those to > > an NAS elsewhere in the building. While we have a small staff, our > > building is 62,000 sq ft with three floors, so I can get them physically > > separated even if not really off site. For the web server, we have a two > > drive raid set up with two spare drive bays. Besides backing up with BPC, > > I would also dupe the drive on a schedule and take off site. > > > To expand on Jeffrey's comment below - the idea of "duping" your > backups is fraught with issues when the BPC filesystem gets past a > certain size. > > To handle the creation of a redundant backup, I would advise one of > the following: > > A - Periodically use BPC to run a full backup set to a different > target filesystem - this is simplest and quite likely the fastest, and > only becomes an issue if you have a limited time window - in which > case LVM snapshotting can help as Jeffrey mentioned. > > B - use a block-level cloning process (like DD or its derivatives, or > Ghost-like COTS programs if that's more comfortable for you, to do > partition copying to a removable drive. Some use temporary RAID1 > mirrors, but I don't recommend it. > > C - a script included with BPC called BackupPC_tarPCCopy, designed to > do exactly this process. I wrote a script BackupPC_copyPcPool that I posted to the list that should be a bit more efficient & faster than BackupPC_tarPCCopy...
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