[Discuss] RAID question

[pw]

GNU ddrescue.

https://www.gnu.org/software/ddrescue/

P

On 16-04-30 04:05 PM, Patrick wrote:
> Hi.  :-)
>
> Does anyone know if there's a Linux utility for drive cloning,
> which compares two drives and *only* writes changes to the
> destination drive where it finds differences?  Using dd would
> also work, but would end up doing a lot of unnecessary work in
> the process [and performing a lot of unnecessary writes].
>
> I had this idea to build a hardware RAID 1+0 array using SD
> cards and some junk off eBay, but maintaining it if/when a card
> fails could get interesting...  It would also be convenient if
> I could remove a single RAID 0 drive, use it for a while, then
> reintroduce it [with changes] to the mirrored 1+0 array.
>
>
> Thanks,
> Patrick.
>