Re: Fwd: manually destriping a 4 drive raid5 with one missing drive

[Phil Turmel <philip@turmel.org>]

On 10/23/2015 12:20 PM, Marek wrote:
> Not sure if it's destrip or destripe but it's basically like puzzle
> you take a block from each drive according to the layout you are using
> e.g. Left symmetric and then write it down in that order computing
> missing blocks from parity blocks - this way you would write an image
> which you can mount without using mdadm. Data restoration companies
> are using this technique.

No special tool required.  Obtain a new drive big enough to hold your
entire array and 'dd' from /dev/mdX to your new drive.

{ BTW: convention on kernel.org is to reply-to-all, trim unnecessary
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Phil