[ale] Mirroring drives without RAID

[Alex Carver]

Well, any system unless Windows or Mac (there is a potential that this
drive gets plugged into one of those) so it has to be portable.

I think the most straightforward way to go is with the cron/rsync.  I
had just thought that there might be some kind of fake-RAID method that
would duplicate on the fly similar to RAID without actually using RAID
volumes.

On 2015-02-14 11:44, Michael Trausch wrote:
> Raid can be rebuilt in any system, if software mdraid. Btrfs can do this too; set it to duplicate both metadata and data on a two drive volume. Repair can be done with any modern system with up to date btrfs utils and kernel driver. 
> 
> Sent from my iPhone
> 
>> On Feb 12, 2015, at 4:42 PM, Alex Carver <agcarver+ale at acarver.net> wrote:
>>
>> Got an unusual question from someone at work.  He wants to set up a pair
>> of drives to store test data which is usually of significant volume
>> (several tens of GBs per test).
>>
>> He doesn't want to use RAID so that any single drive can be plugged into
>> any other computer to mount and recover the data directly.
>>
>> The first thought was just a daily cron job rsyncing the two drives but
>> I wanted to ask if there was some kind of solution that faked a mirrored
>> RAID onto two drives where each drive is just a standard
>> partition/volume set (i.e. it's composed only of ext2/3/4 partitions and
>> not a RAID partition/volume)?
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