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
