Only one backplane with SAS expander (88Y7421) can be installed in a server and can be used connected to a single 8-drive backplane (88Y7419), a single 4-drive backplane (88Y7418), or two 4-drive backplanes (88Y7418). The SAS expander backplane cannot be used with the eXFlash backplane.
2.5"
Bezel panel
4
Serial Attached SCSI (SAS)
Y
IBM System x3750 M4