DIMM E2 on server 2/2 operability: inoperable. We saw this fault on a UCS B2. DIMM E2 on server 2/2 operability: inoperable. We installed an ESXi 5 host on this blade and it had worked fine for some time. However, it crashed (pink screen on the ESX console) a couple of times and we started wondering what was going on. We recovered it by rebooting the blade, but that was not a final solution. We were told that the cause could be hardware related, so we decided to take a look at the UCS manager. Under Faults and Alarms we saw one entry for this particular blade server, namely a problem with the DIMM operability: DIMM operability: inoperable fault – UCSMSearching on cisco. DIMM becomes inoperable, you need to replace the DIMM. DIMM E2 on server 2/2 operability: inoperable Fault seen from the UCS manager. Cisco TAC said that the error threshold was exceeded and that it needed an RMA. UCS B200 M5 Blade Server: Access product specifications, documents, downloads, Visio stencils, product images, and community content. You can see what the UCS Fault Code: F0. UCS C- series. We opened a ticket with Cisco TAC to have this confirmed and, indeed, they said that we had to replace the DIMM, as it had passed the threshold of ECC errors. We created an RMA, but while we were waiting for it to arrive, we decided to switch this DIMM to another bank within the same B2. The DIMM appeared to work normally in its new location and it has continued like that so far (this happened 3 months before this is being post). The fault was cleared: DIMM inoperable fault recovered – UCSMHowever, the TAC warned us that the error may re- appear on the same DIMM in the future and suggested that we monitored the server for some time. You can also check the memory status from the UCSM CLI with this command: SYSFAB- A# scope server 2/2. SYSFAB- A /chassis/server # show memory. DIMM Location Presence Overall Status Type Capacity (MB) Clock—- ———- —————- ———————— ———— ————- —–1 A0 Equipped Operable DDR3 8. A1 Equipped Operable DDR3 8. A2 Equipped Operable DDR3 1. B0 Equipped Operable DDR3 8. B1 Equipped Operable DDR3 8. B2 Equipped Operable DDR3 1. C0 Equipped Operable DDR3 8. C1 Equipped Operable DDR3 8. C2 Equipped Operable DDR3 1. D0 Equipped Operable DDR3 8. D1 Equipped Operable DDR3 8. D2 Equipped Operable DDR3 1. E0 Equipped Operable DDR3 8. E1 Equipped Operable DDR3 8. E2 Equipped Operable DDR3 1. F0 Equipped Operable DDR3 8. F1 Equipped Operable DDR3 8. F2 Equipped Operable DDR3 1. G0 Equipped Operable DDR3 8. G1 Equipped Operable DDR3 8. G2 Equipped Operable DDR3 1. H0 Equipped Operable DDR3 8. H1 Equipped Operable DDR3 8. H2 Equipped Operable DDR3 1. We replaced the DIMM with the new one and returned the damaged part back to Cisco.
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November 2017
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