Due to the significant complexity and breadth of the software and hardware used in modern storage environments, there are many myths and misconceptions regarding the continuing need for disk defragmentation. It is understandably easy to accept many of them as replacements for file/disk defragmentation as many seek to solve the same issue, the fact that the disk is the weak link.
New disk subsystem technologies absolutely aid in a better performing system, but they do not solve issues generated at the file system level such as file fragmentation. Physical storage devices and controllers will optimise the location of blocks across the underlying physical spindles, but none are involved with how the file system requests I/Os: The need to defragment SAN, RAID, SATA, SCSI, NAS, HHD, SSDs devices continues today. READ MORE!