From: Les M. <les...@gm...> - 2010-08-20 15:10:45
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On 8/20/2010 9:46 AM, Farmol SPA wrote: > -------- Original Message -------- > Subject: Re: [BackupPC-users] Backup backuppc > From: Mirco Piccin <pi...@gm...> > To: General list for user discussion, questions and support > <bac...@li...> > Date: Fri Aug 20 2010 16:28:05 GMT+0200 (ora Legale Europa Occidentale) >> the point is that a snapshot : >> - is very fast, and then you can copy off the machine using netcat or >> rsynch, without worries about BackupPC activity. >> Believe me, now you are sure that BackupPC is "sleeping" during the >> copy, but tomorrow and tomorrow again with one more server/pc to >> backup, and another one, and so on..? >> - if the logical volume is a removable USB disk partition , you can >> simply remove that usb disk and store it everywhere, without >> additional copy. > > So: > > 1. I create a snapshot lv of the backuppc source lv on an external > USB device; No, you make a snapshot on the internal drive containing the archive - or you unmount the archive partition. > 2. I unmount the snapshot; Snapshots aren't mounted and don't change - thus the advantage of using them. > 3. I eject the disk. You copy the snapshot or unmounted archive partition using dd or a similar image level copy technique that takes one pass across the disk to complete. If you are starting over, there is another way - make a software RAID1 mirror with the USB drive included (or specified as "missing". Then you can connect and resync the mirror and get the effect of an image copy even with the partition mounted. However, the copy activity will keep the drive so busy you can't realistically do much else on it at the same time. -- Les Mikesell les...@gm... |