will I loose my data?

[janzy]

I'm currently running v4.3 DSM on my HP n54l.

The bios hack has been done and I have 1 250gb drive and 3 3TB drives in the bays running as jbod.

Can I shutdown the unit and move the 250Gb drive to the ood area and then put another 3tb drive in the empty bay without loosing my data?

Thanks