Thanks for replying. This system is not in support with EMC or other vendor, so have to troubleshoot myself. I ended up replacing the disk and so far no further alerts on the disk. Hope it was simple disk failure.  @ Roger - E-mail alert I got had these messages:  Time Stamp 01/24/14 02:40:23 (GMT) Event Number a18 Severity Critical Error Host CX700A SPA Device Bus 1 Enclosure 1 Disk 0 Description CRU Drive Causing Loop Failure  Time Stamp 01/24/14 02:40:24 (GMT) Event Number 7127897c Severity Error Host CX700A SP N/A Device N/A Description Disk(Bus 1 Enclosure 1 Disk 0) failed or was physically removed.  Time Stamp 01/24/14 02:40:24 (GMT) Event Number a07 Severity Critical Error Host CX700A SPA Device Bus 1 Enclosure 1 Disk 0 Description CRU Powered Down  Time Stamp 01/24/14 02:40:25 (GMT) Event Number 906 Severity Error Host CX700A SPA Device Enclosure 1 Disk 14 Description Unit Shutdown 
Hello, Cx700 system triggered alerts for disk Bus 1 Enclosure 1 Disk 0 like 'CRU Drive Causing Loop Failure' and after sometime 'Disk(Bus 1 Enclosure 1 Disk 0) failed or was physically removed'. Data is copied to Hot Spare as I see 'All rebuilds for a FRU have completed' message. Just wondering if the Loop failure message is anything to check before replacing disk, please advise. Thanks!
Cx700 - CRU Drive Causing Loop Failure