A method and system to improve the operations of a registered memory module. CRC meta data is compared with either the CRC generated from the data read from the disk drive or the CRC generated from the data reconstructed from the parity drive. An outer curler segment is coupled to the shell support member. The invention is characterized in that the mass of the weight is set to about 40% or more of the mass of the striker. Packet loss and packet jitter may also be measured and compared to levels guaranteed by the service level agreement. The apparatus may include an extender coupled to the receiver and providing a shelf that is more rearward than the shelf of the receiver.