09-27-2017 01:55 PM - edited 03-08-2019 12:11 PM
I need to load an IOS onto a 3850 due to a data corruption on the device. Can I just copy the IOS file onto a standard USB stick, or does it require some odd file format? Anything else I need to be aware of?
09-27-2017 02:07 PM - edited 09-27-2017 02:10 PM
Hi
Yes, you can use any standard USB memory stick, but filesystem format must be FAT.
Also this link can be useful.
http://www.techrepublic.com/blog/data-center/using-a-usb-flash-drive-with-your-cisco-router/
Hope it is useful
:-)
09-27-2017 02:59 PM
Not all USB sticks and sizes are supported. Don't use anything bigger than 16 Gb. I've had good success rates when using a Samsung Bar (image below).
07-09-2020 04:16 AM
For anyone else out there having this issue: The drive needs to be formatted as FAT (a.k.a FAT16).
FAT can only be used on partitions of up to 4GB so if you have a flashdrive larger than that, you'll need to use diskpart (or your preferred partition software) to create a partition of max 4GB. Then you will be able to format that partition as FAT and the router will recognise it.
These are the diskpart commands on Windows. THIS WILL WIPE THE CONTENTS OF YOUR USB PENDRIVE:
diskpart
list disk
select disk <INDEX OF USB DISK>
clean
create part primary size=4000
active
Done! Now you can use Windows Explorer to format the drive as FAT.
Cheers!
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