SEFX61Z-N
Sun SPARC Enterprise Server I/O Tray with 4 * PCI-E slots and 1 PCI-X slots for use with SPARC Enterprise M5000 and M4000 servers (note, M4000 servers pre-configured with 1 I/O tray maximum). 2nd I/O tray required on M5000 for use of optional disk drives