Whether the RH5885H V3 can be upgraded from 4-socket to 8-socket

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The RH5885 V3 and RH5885H V3 cannot be upgraded from a 4-socket to an 8-socket configuration. You can purchase 8-socket RH8100 V3 servers and use them to substitute for RH5885 V3 and RH5885H V3 servers.

Other related questions:
Whether an RH5885 V2 8-socket server can be divided into two 4-socket servers
In principle, an RH5885 V2 8-socket server is not allowed to be divided into two 4-socket servers unless the customer requests it. If it is divided and a CPU error occurs on one server, the CPU error will also be reported on the other server. In this case, you need to use the BMC for 4-socket servers instead.

Differences between the 4-socket RH5885 V2 and 8-socket RH5885 V2
An 8-socket RH5885 V2 server is made up of two 4-socket RH5885 V2 servers connected through four QPI cables. One of the 4-socket RH5885 V2 servers serves as the master node and the other as the slave node. Hardware differences: ? Rear I/O module: For the 4-socket server, the rear I/O module can be configured with two hard disks and the QPI cables cannot be connected. For the 8-socket server, the rear I/O module cannot be configured with two hard disks and the QPI cables are required. ? Hard disk quantity: 10 (4-socket server); 16 (8-socket server) ? CPU configuration: The 8-socket server must be configured with all CPUs and the 4-socket server can be configured with two or four CPUs. ? DIMM configuration: For the 4-socket server, DIMMs must be symmetrically installed on the memory risers. For the 8-socket server, apart from the symmetry requirements, the DIMMs must be installed on two nodes and the DIMM configuration must be the same on the two memory risers. ? RAID configuration: The 8-socket server requires only one RAID controller card, which must be installed on the master node. Software differences: ? The slave node of the 8-socket server has no BIOS. Therefore, no BIOS information is displayed on iMana. ? The power button on the front panel of the slave node of the 8-socket server is available, but there is no related power control page on the iMana WebUI. ? The iMana of the slave node of the 8-socket server does not provide black box, power-on strategy, system start strategy, and serial port switchover functions.

Whether two RH5885 V2 4-socket servers can be combined into one 8-socket server
Two RH5885 V2 4-socket servers cannot be combined into one 8-socket server. To upgrade a 4-socket server to an 8-socket server, you need to use the BMC for 8-socket servers and upgrade the BIOS version to a version for 8-socket servers.

What is the function of Socket Disable for Fault Resilient Boot (FRB) in the RH1288 V3
This feature isolates the faulty socket during startup to improve system reliability.

Minimum number of DIMMs in a two-socket server
A minimum of one DIMM can be installed in a two-socket server.

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