man > make-bcache(8)

make-bcache(8)                         System Manager's Manual                        make-bcache(8)

NAME
       make-bcache - create a cache device

SYNOPSIS
       make-bcache [ -U UUID ] [ -b bucket-size ] device

OPTIONS
       -C     Create a cache

       -B     Create a backing device (kernel functionality not yet implemented)

       -U UUID
              Create a cache device with the specified UUID

       -b bucket-size
              Specifies  the bucket size. Allocation is done in terms of buckets, and cache hits are
              counted per bucket; thus a smaller bucket size will give better cache utilization, but
              poorer write performance. The bucket size is intended to be equal to the size of  your
              SSD's erase blocks, which seems to be 128k-512k for most SSDs. Must be a power of two;
              accepts human readable units. Defaults to 128k.

                                                                                      make-bcache(8)