Sorry to bump the question already but if I am going to return this 2405
then I want to tell them sometime tomorrow.
In short my situation is this: together the LSI and the Adaptec cost ~£290 and it means I have a hardware RAID 10 and a software RAID 5 - far from ideal. If I am to return these it might cost ~£15 and the single replacement card
will cost ~£340. This is the solution that "feels right" to me but it will cost £355-£360 in total.
Another possible solution is to return only the LSI (~£140 back to me) and buy a cheaper SATA RAID card this will put me in roughly the same position storage-wise I'm in now but I might be ~£50 better off. This solution "feels wrong" and does potentially come with serious issues but in total only costs £240-£245.