[Disksim-users] Does DiskSim support disk array reconstruction/rebuild?

[Steve Schlosser]

No, Disksim does not support its own rebuild.  You would have to
generate this workload yourself.  I would do this by simulating an
5-disk array with no redundancy, generating simultaneous reads from
the four non-failed disks, adding in some think time to simulate
re-building the data from parity, then issuing writes to the fifth
disk.  While this is running, you could run some foreground requests
as well.  You could do this pretty easily by writing a program that
uses the disksim_interface to issue your requests to the disk and
drive the simulator - see the syssim program as an example of how to
use disksim_interface.

-steve

On 3/7/07, Jack Wang <ouki at hotmail.com> wrote:
>
> Hello Disksim user community,
>
>  I am working on a project and I would like to use Disksim to simulate my
> algorithms. But I am not sure if the Disksim supports what I am trying to
> do.
>
>  Does Disksim support disk array reconstruction simulations? Let's say I
> have RAID5 array with five disks. In case of hard disk failure, I need to
> simulate the disk rebuilding process while serving I/O requests. The
> reconstruction time need to be calculated and the drawback to the I/O
> performance needs to be counted as well.
>
>  I would appreciate if anyone could give me an answer, together with a brief
> hint on how to accomplish that. Thanks.
>
>  Jack
>
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