It should be A and B

From the document you referenced, this should not be used before the firmware upgrade is performed, but only after the upgrade is completed. Not E

Selected Answer: AE A and E are the ones

Selected Answer: AE https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/upgrading/from1-1-1/to1-4-1/UpgradingCiscoUCSFrom1-1-1To1-4-1_chapter2.html#:~:text=in%20a%20Chassis-,Completing%20the%20Prerequisites%20for%20Upgrading%20the%20Firmware,-This%20chapter%20includes https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Firmware-Mgmt/4-0/b_UCSM_GUI_Firmware_Management_Guide_4-0/b_UCSM_GUI_Firmware_Management_Guide_4-0_chapter_0100.html#task_i4c_bzx_42b:~:text=or%20other%20document.-,Checking%20Conformance%20of%20the%20Contents%20of%20a%20Firmware%20Package,-You%20can%20use

Will go for A, B. The question says: do stuff before. E is after the upgrade procedure. Smartl call home should be disabled. That leaves us with two options: B,C. B makes more sense, because 90% raises faults in UCSM

As per the document below, "when the bootflash partition exceeds 70 percent, faults are raised". It also says we should have at least 20% free space, otherwise Auto Install will not proceed. https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Firmware-Mgmt/4-2/b_UCSM_GUI_Firmware_Management_Guide_4-2/b_UCSM_GUI_Firmware_Management_Guide_chapter_010.html

Selected Answer: AC D => incorrect E => important, but after the upgrade B & C could both be right; checking available space is important, and 15% is the better threshold compared to 10%

Selected Answer: AC The ask is for "before the upgrade". That rules out E. Checking available bootflash space is in the prereqs, 20% is mentioned, and I’m guessing the question was written for older code so I’m going with 15%

Selected Answer: AC A. Full State and All Configuration backup Before any UCS firmware or infrastructure upgrade, Cisco best practice is to: • Take a Full State backup (system + configuration) • Take an All Configuration backup This helps ensure: • Full recovery if the upgrade fails • The ability to roll back to a known-good state This is standard pre-upgrade hygiene for UCS environments. ⸻ C. At least 15% bootflash free space Cisco UCS firmware upgrades need enough space on the Fabric Interconnect bootflash to: • Stage firmware images • Handle temporary files during activation Cisco recommends a minimum of 15% free bootflash space to safely do upgrades. Less than that can cause upgrade failures or incomplete image downloads.