From mboxrd@z Thu Jan 1 00:00:00 1970 From: Reindl Harald Subject: Re: Encrypted software RAID1 with Debian Stretch Date: Thu, 14 Sep 2017 19:01:02 +0200 Message-ID: References: <28c61e8c14f44ec6727b8f3fb3c80c98@riseup.net> <59A92C91.7010508@youngman.org.uk> <87y3pjv6jw.fsf@esperi.org.uk> <3a85ea27-602a-3f5b-3537-d4159a56c2ed@thelounge.net> <87377qvh7t.fsf@esperi.org.uk> <59B95891.9040809@youngman.org.uk> <87r2v9sfkm.fsf@esperi.org.uk> <59BA6FAF.9020501@youngman.org.uk> <878thhsa0w.fsf@esperi.org.uk> <20170914183932.001ffe25@natsu> <87wp51qq60.fsf@esperi.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <87wp51qq60.fsf@esperi.org.uk> Content-Language: de-CH Sender: linux-raid-owner@vger.kernel.org To: Nix , Roman Mamedov Cc: Wols Lists , linux-raid List-Id: linux-raid.ids Am 14.09.2017 um 17:02 schrieb Nix: > On 14 Sep 2017, Roman Mamedov said: > >> On Thu, 14 Sep 2017 14:08:15 +0100 >> Nix wrote: >> >>> Backups based on not-yet-reliable filesystems are, uh, less effective. >> >> You're just grasping for straws at this point. Single-device Btrfs and >> its core features like snapshotting and compression are very solid, it is >> silly trying to "cast doubt" on those. > > I'm not grasping for straws, but I do think I'm a lot more conservative > than you where backups are concerned! depends also on the type of backup, normally you have more than once anyways * microserver with NFS, dedicated to run a vmware backup-appliance * that beast holding 31 days of anything is backuped once per month on a external disk, there are two identical external disks, one is always located off-house and both are containing the *supsended* backup appliance inclduding memory so, and the btrfs backup machine is located on the other side of the town, does dauly backups and rnshshot for 7 days and is reachable via ssh/sftp and key-auth - that one is mostly for "i have deleted a single file or folder can you restore it" why BTRFS? because of the compression! the other stuuf above is 1 time XFS and the external disks ext4 *that* is how a backup plan looks like because when you lose your complete backup because one damaged filesystem you have no backup plan at all (take it offeding if you want to do so...)