Re: How to backup of large md raid volumes?

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Am 20.05.2017 um 20:00 schrieb Wols Lists:
On 19/05/17 06:49, Reindl Harald wrote:


Am 18.05.2017 um 23:37 schrieb Ram Ramesh:
Any one have a method to backup large volumes like md raid6 (16TB)?
Since the backup will not fit in one disk (in many cases and mine too)
I am wondering, if there is a known/easy technique to backup using
multiple usb hard drives. I googed and found a few fancy backup
utils/systems like Amanda etc. They are overkill for me. I am choosing
not to back up simply because of the complexity of setup as the data
in my RAID volume is NOT precious and can be replaced with a week of
effort.

If any one can think of some thing simple, please point me to it and I
will do the reading to figure out

https://www.amazon.com/16TB-Desktop-External-Drive-WDBLWE0160JCH-NESN/dp/B01B6BN1CU


499$ is not that much for a 16 TB external backup disk and whn you
format it with BTRFS and enable compression you most likely have a lot
fo space and your backup finally is just a single rsync command

My only reaction to that is it's not a 16TB disk. It's a 16TB raid-0
array. We had a similar setup ages ago (when 500GB was huge) with a
500GB external USB drive. One of the 250GB drives failed and the entire
array was lost

well, it's a *backup* drive - when it's gone it's gone

we are using a bunch of them with 4 TB since 2011 for offsite-backups of the whole company cluster and they are a RAID0 too



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