RH8100 V3 PCIe slots

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The RH8100 V3 supports hot-swappable and non-hot-swappable PCIe cards, and a maximum of 16 PCIe cards can be installed in front and rear I/O modules.
1. The rear I/O module supports 10 standard PCIe cards: four hot-swappable and six non-hot-swappable ones. For details, visit http://support.huawei.com/ehedex/pages/DOC1000010818YEE0409N/18/DOC1000010818YEE0409N/18/resources/en/out/rh8100_V3_user_guide_en/SemiXML%28rh8100_v3_inst_semi%29/rh8100_v3/inst/it_rh8100_v3_100004_trouble.html.

2. FM-A provides two PCIe riser cards with six PCIe slots for PCIe 3.0 x8 and PCIe 3.0 x16 cards. For details, visit http://support.huawei.com/ehedex/pages/DOC1000010818YEE0409N/18/DOC1000010818YEE0409N/18/resources/en/out/rh8100_V3_user_guide_en/SemiXML%28rh8100_v3_inst_semi%29/rh8100_v3/inst/it_rh8100_v3_100007_FM.html.

3. FM-B and FM-C do not support PCIe cards.

Other related questions:
Which is PCIe slots provided by different PCIe riser module in RH1288 V3
PCIe riser module 1 provides slot 1, and PCIe riser module 2 provides slot 2. NOTE: The PCIe slots mapping to a vacant CPU socket are unavailable. The following describes the mapping between PCIe slots and CPUs, and the PCIe specifications of the RH1288 V3. PCIe Slot CPU PCIe Standard Connector Bandwidth Bus Width Slot1 CPU1 PCIe 3.0 x16 x16 Slot2 CPU2 PCIe 3.0 x16 x16

RH8100 V3 I/O module
The RH8100 V3 provides front and rear I/O modules. Front I/O modules include FM-A, FM-B, and FM-C. For their appearances, visit http://support.huawei.com/ehedex/pages/DOC1000010818YEE0409N/18/DOC1000010818YEE0409N/18/resources/en/out/rh8100_V3_user_guide_en/SemiXML%28rh8100_v3_inst_semi%29/rh8100_v3/inst/it_rh8100_v3_100007_FM.html. ? FM-A houses hard disks and RAID controller cards, and provides a maximum of six standard PCIe slots (PCIe riser modules are required). The slots support PCIe SSD cards and GPUs and do not support standard PCIe cards (such as NICs, IB cards, and HBAs) with external cables. ? FM-B and FM-C house hard disks and RAID controller cards, and do not provide standard PCIe slots. Rear I/O modules provide four slots for hot-swappable PCIe cards and six slots for non-hot-swappable PCIe cards.

Whether the HFCs are hot-swappable
The HFCs of the RH8100 V3 do not support hot swap. Forcible removal will result in server power-off. Power off the server before replacing an HFC. For details, see http://support.huawei.com/ehedex/pages/DOC1000010818YEE0409N/18/DOC1000010818YEE0409N/18/resources/en/out/rh8100_V3_user_guide_en/SemiXML%28rh8100_v3_inst_semi%29/rh8100_v3/inst/it_rh8100_v3_100029.html?ft=0&id=server_poweroff_5.

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