Hello, Not typically.  If you are refering to Dell/EQL storage, if you do not leave some space unallocated that can impact performance.  Especially if you are using snapshots or replication. Depending on the size of the array, in the range of 5% unallocated is preferred. Regards,  
Hi,can disk performance (IOPS, MBPS and latency) deteriorate and become worse after a while ? Thank you.
disk deterioration