I really need some help with my c6100 (Dell C6100 XS23-TY3, 3 HDD per server). I'm using all four nodes and everything works great. Until one hard drive started to act strangely. the third hard drive in the ZFS pool was suddenly offline and I couldn't get it to go online. I thought it was broken and replaced it. Everything worked great for about a week and then this drive also was taken offline (Hitachi SAS 4GB). Order a new one, but this time the server wouldn't accept a new drive. I then moved the harddrives and the server to another place in the chassis to rule out the backplane. Same error. The cables from the SAS-card looked a bit beaten up, so I replaced them with a brand new cable package. Still no go. Now I really do not know what to try. Any suggestions?