>> You can turn on write back caching if you have a UPS as well >> (provided your UPS is wired into your system for a graceful shutdown) > > Hopefully you have a redundant PS unit. Having a UPS is not going to > help if your PS fails. That's a very good point never thought of that. Acrtually this RAID 1 setup I'm planning is for my desktop machine, problem is is's not built like a server so there is not the traditional slid in bay for a second PS as do many 1 and 2u rack servers have. Unless there is some specialty product available that somehow fits in to a tower case. Could you reccomend a redundant PS for a desktop machine (if they exist)? _________________________________________________________________ Connect and share in new ways with Windows Live. http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_012008