Symptom

+ On Nexus 9K, when attempting to boot NXOS version 9.x from USB via the loader prompt you may see the output below, followed by getting kicked back to the loader prompt. ================================================ Bootable Disk is detected. Device Name: Micron_1100_MTFDDAV256TBN Version 2.18.1260. Copyright (C) 2020 American Megatrends, Inc. FPGA SPI Flash Micron(Numonyx) N25Q128 Board type 4 IOFPGA @ 0xd8000000 SLOT_ID @ 0xf Set fan speed to 60% Filesystem type is ext2fs, partition type 0x83 ACI chassis Trying to read config file /boot/grub/menu.lst.local from (hd0,0) Filesystem type is fat, partition type 0xc Trying to read config file /boot/grub/menu.lst.local from (hd1,4) Filesystem type is ext2fs, partition type 0x83 Trying to read config file /boot/grub/menu.lst.local from (hd1,5) Filesystem type is ext2fs, partition type 0x83 Auto boot configuration file is absent. Autoboot image boot failed. Trying recovery image Trying to read config file /boot/grub/menu.lst.recovery from (hd1,4) Filesystem type is ext2fs, partition type 0x83 Trying to read config file /boot/grub/menu.lst.recovery from (hd1,5) Filesystem type is ext2fs, partition type 0x83 Auto boot configuration file is absent. No autoboot or failed autoboot. falling to loader ================================================

Conditions

+ This issue only occurs when attempting to boot NXOS version 9.x from USB + This issue does not occur when booting 7.x NXOS images from USB + This issue does not occur if the 9.x NXOS image is booted from bootflash

Workaround

1. Have 7.x and 9.x NXOS versions on USB 2. In loader, boot 7.x version from USB 3. Once successfully booted in 7.x, copy the 9.x image file from USB to bootflash via the "copy" command 4. Modify the boot statements from the 7.x image to the 9.x image using the "boot" command 5. Reload the switch to boot to the 9.x image

Further Problem Description