switch 2960 upgrade failure issue

[ahmedmaged9432]

i have switch 2960-X with version 15.0 have updated to 15.2 but after update to newer version , uplink was down and shows me cisco error msg then i have tried to get back to old version but it keeps reloading to the updated version , after many times to reloaded to bootloader mode  i need to rollback but usb is not working  as below :

switch: dir usbflash1:
ERR: usbd_bulk_transfer fail status 32
ERR: Read ERROR start 0 blks 1
ERR: usbd_bulk_transfer fail status 32
ERR: Read ERROR start 0 blks 1
ERR: usbd_bulk_transfer fail status 32
ERR: Read ERROR start 0 blks 1

what can i do to have the old version and install

[balaji.bandi · Accepted solution]

you must use FAT16 system on a ubs stick maximum of 2 GB capacity,

Switch: flash init  ( try this may not work, but worth issue command

Switch:  boot usbflash0:ciscoimage.bin (change this as per the your image name)  0 or 1 depends USB recognised.

connected the console post complete boot process while doing to understand.

[ahmedmaged9432 · Accepted solution]

i have 4 GB usb stick how to format it by FAT16 

[balaji.bandi · Accepted solution]

you can do as below :

https://www.instructables.com/Format-USB-Flash-Drive-to-FATFAT16-not-FAT32/

[saurabh kubavat]

yes 2960 switch work with less then 2 gb usb and fat 16 format.

*i used 1gb usb with FAT16 format on a usb stick, placed iso in it and it worked with me.

usb is now visible and i can see IOS file now

i have booted with ios and switch is working fine now.