This product is either discontinued or we cannot get that from suppliers.
SSD Drives (A3D26AA), Internal hard drive, 2.5" SFF, Serial ATA-600, 256 GB, Data Transfer Rate 600 MBps, Internal Data Rate 500 MBps, 2.5" SFF or 3.5" (with included bay adapter).
The 256GB SATA Solid State Drive from HP is an internal drive providing a transfer rate of 3 Gbps. It is compatible with HP Z200, Z400, Z600 and Z800 Workstation series. With no moving parts, the solid state drive provides.