You can update the firmware using the sandisk ssd f/w upgradation toolkit from
SanDisk SSD Toolkit download
http://kb.sandisk.com/app/answers/detail/a_id/9328/
SanDisk Ultra SSD Firmware release notes
http://kb.sandisk.com/app/answers/detail/a_id/10192
if you cant upgrade using toolkit, try to burn the iso image using some image burning software like power iso, boot the system using the newly burned disk and it will definately update and will resolve the issue
