I have been tasked with adding some large disks to a server that is several years old. The raid card in this server can support 12 disks, but its age prevents it from achieving any raid disk > 3TB.
I know a lot about RAIDs but not a lot about LVM.
In the end, I have setup two RAID5 arrays of 3TB each. On the server, it would be nice to use LVM to combine them into one disk. Two questions:
Am I gaining anything at all by using RAID in the first place if I'm just going to combine it all in the end using LVM?
Am I losing the security of RAID5 by combining the two RAID5 disks into one disk using LVM? Does it defeat the purpose of using RAID5 to begin with.