md does a monthly resync?? (was Re: Questions about RAID 6)
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From: Alex Samad on 4 May 2010 19:50 On Tue, 2010-05-04 at 14:50 -0500, Ron Johnson wrote: > On 05/04/2010 11:08 AM, Hugo Vanwoerkom wrote: > [snip] > > > > I forget your specifics, but you do RAID *and* backup regularly to an > > external lvm2? > > > > No, no RAID for me *at home*. But at work I manage databases on all > sorts of (to use a quaint old phrase) super-minicomputers, and if > they ever needed to "resynchronize" monthly, we'd have tossed them > out immediately, since for the money we spend on them, they're > supposed to stay in sync *always*. maybe resync was the wrong word to use, the consistency of the array is checked, it shows up in /proc/mdadm as resync hardware raid controllers do this as well, its like checking you backups tapes make sure you can restore if needed. > > -- > Dissent is patriotic, remember? > > -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/1273016433.20116.36.camel(a)alex-mini.samad.com.au
From: Hugo Vanwoerkom on 6 May 2010 15:50
Eduardo M KALINOWSKI wrote: > On Ter, 04 Mai 2010, Hugo Vanwoerkom wrote: >> martin f krafft wrote: >>> RAID is not a backup solution, it's an availability measure. >>> >> >> But as data availability goes up by using RAID doesn't the need for >> backing up that same data go down? Or is this just semantics? > > RAID does not prevent against you accidentaly deleting a file you did > not want deleted. And the deletion will be immediately reflected to all > disks in the array. > > Good point. I had overlooked that. Hugo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/hrv60u$8in$1(a)dough.gmane.org |