Effective May 25, 2012, IBM® will withdraw from marketing the following feature. On or after the effective date of withdrawal, you can no longer order this feature directly from IBM.
Features associated with 2145-CF8 and 2145-CG8 not listed in this announcement continue to be available.
For new orders, the customer requested arrival date (CRAD) can be no later than June 22, 2012.
146GB Solid-State Device 2145-CF8,CG8 Feature number : 4601
Please see the announcement letter here