Pioneer SCSI-2 - Manual (Page 96)

Read(10)
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2.19 Read(10)
Operation code is (28h).
This ten byte READ command allows reads of up to 64K blocks. The logical blocks will have
the length set by MODE SELECT or the power-on default.
After a read operation, the drive holds the head at the last read track until an inactivity time-out
occurs.
NOTE: The DPO, FUA and RelAdr bits (not shown) in byte 1 are not supported, and must be
set to 0.