All TLER really does is give a drive a little more time to respond before the RAID controller declarers it unresponsive and kicks it off the array.....
Before using the old machine method, I would try burning it to a CD as a iso and try to boot from that....if it works great! Western Digital Drives - TLER Setting Help [Text View] - AVS Forum
also with pictures and a alternative methodTLER and MD Arrays » Ethertubes.com
As a side question exactly why are you doing this?