After fastboot swiped the ROM of CM13, ADB sideload was used to swiped the ROM, but every time there was an error on the phone

E: failed to mount /cache (No such device)

The fastboot-w command can not be used to retrieve the cache from the cache. It can not be used to retrieve the cache from the cache. The fastboot-w command can not be used to retrieve the cache.

-w erase userdata and cache (and format if supported by partition type)

Double-clear operations will also be done, and partitions will be rebuilt

wiping userdata...
Creating filesystem with parameter
    Size: 13610496000
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 8160
    Inode size: 256
    Journal blocks: 32768
    Label:
    Blocks: 3322875
    Block groups: 102
    Reserved block group size: 815

Failed to mount /cache error will not be reported again after the adb sideload is executed.
E:Can’t mount /cache/recovery/log