Re: Seeking advice and documentation on non-standard software RAID1 setup
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Andrei Popescu wrote:
> So here is what I thought of:
>
> - make a software RAID1 on my laptop between a SD card and a partition
> on the builtin HDD
> - whenever I want or need to use the other laptop I use the SD card to
> boot from it and work in my environment
>
> This way I can enjoy my work environment on whatever machine I work and
> also have a sort of backup.
>
> My questions are:
>
> 1. Is this setup possible and/or feasible?
Probably yes, though I have never tried this. This would mean that your
disks ie. the raid has to be rebuild each time you reconnect the disks.
- From my experience this is a rather time consuming.
You also get a problem, if for some reason you modify both disks
independently. (Say you quickly edit some stuff on A while the second
disk is attached to B or unplugged).
> 2. Where should I start?
> 3. Any other issues I haven't thought of (I have zero experience with
> RAID)
I'd suggest using unison or some other application to keep both disks in
sync. unison is rather fast at syncing the disks and even has some
capabilities of merging (mainly usefull for text files) in case you
modify your files on both replicas in between two runs of unison.
Effectively you will always have one 'offline' backup: either the
external disk (when working on the home laptop) or the laptop at home
(when working with the external disk).
Just my 2ct,
- --
Johannes
In questions of science, the authority of a thousand is not worth the
humble reasoning of a single individual.
- - Galileo Galilei, physicist and astronomer (1564-1642)
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