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I would like to change the number of logical blocks on a drive and the block size by modifying the write buffer.

The output of read capacity on that drive shows me number of logical blocks as 27344764928. How can I change that value to some lower value?

Do I need to modify a write buffer/mode page of that drive? If yes, how can it be done?

# sg_readcap /dev/sdap
READ CAPACITY (10) indicates device capacity too large
  now trying 16 byte cdb variant
Read Capacity results:
   Protection: prot_en=0, p_type=0, p_i_exponent=0
   Logical block provisioning: lbpme=0, lbprz=0
   Last logical block address=27344764927 (0x65ddfffff), Number of logical blocks=27344764928
   Logical block length=512 bytes
   Logical blocks per physical block exponent=3 [so physical block length=4096 bytes]
   Lowest aligned logical block address=0
Hence:
   Device size: 14000519643136 bytes, 13351936.0 MiB, 14000.52 GB

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