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Two internal ports and 4GB of flash-backed write cache belong to the 761874-B21, the HP Smart Array P840/4GB FBWC 12Gb 2-ports Int FIO SAS controller. FIO marks a factory integrated option, chosen when a ProLiant is configured to order, and the option includes the Smart Storage Battery.
HP offers it for the ProLiant DL380 Gen9 and ML350 Gen9. When ordering controllers for the DL380 Gen9, the matching cable has to be chosen from the cable options, among them the 783007-B21 12LFF Rear 2SFF or 3LFF P840/440 SAS cable kit. HPE SmartCache comes standard, with no licensing required, when a Smart Array P840 controller is installed.
The ML350 Gen9 pairs the P840 with expansion hardware. The 769635-B21 12Gb SAS Expander Card supports 24 drives and works with a P440 or P840 controller. The 769637-B21 ML350 Gen9 Second Expander FIO Kit cannot be selected without it, and when it is selected a second processor, the X4 RPS Enablement FIO Kit 725870-B21 and this 761874-B21 must also be ordered. The 811216-B21 ML350 Gen9 2nd Expander Card is used with the 769635-B21, a second processor, an X4 RPS enablement kit and a P840 for up to 48 drives in the SFF chassis.
The P840 without the FIO marking is the 726897-B21, a separate part number. Related controllers and host adapters for Gen9 ProLiant servers are in HPE server interface cards.
| Part number | 761874-B21 |
| Name | HP Smart Array P840/4GB FBWC 12Gb 2-ports Int FIO SAS Controller |
| Type | factory integrated option (FIO) |
| Cache | 4GB flash-backed write cache (FBWC) |
| SAS speed | 12Gb |
| Internal ports | 2 |
| Smart Storage Battery | included |
| SmartCache | standard with a P840 installed, no license required |
| DL380 Gen9 cable kit option | 783007-B21 (12LFF rear 2SFF or 3LFF P840/440) |
| ML350 Gen9 expansion | 769635-B21 expander (24 drives); 769637-B21 and 811216-B21 second expanders |
| Non-FIO twin | 726897-B21 |
| Compatible with | ProLiant DL380 Gen9, ML350 Gen9 |