PowerEdge 1420 - no int 13 drives to support - array not marked as bootable

I have a PowerEdge 1420 with an Adaptec 1420SA card.

The array has failed and upon inspection in the Adaptec interface I can see that the array is not marked as bootable.

I'm thinking of trying several things:

1 - Remove 1 drive and try on both SATA ports to see if it boots

2- Repeat with the other drive

3- Repeat 1 and 2 having marked the array as bootable.

Does marking the array as bootable affect the data? Is there a better way to attempt recovery? The disks seem physically fine as they show up in the array manager but I don't know which one is the good one as it looks like the array failed a day or two ago but the server itself failed last night.

Thanks.