According to http://www.bitsavers.org/pdf/ansi/X3T9/X3T9.3_185_RevE_SASI_Apr82.pdf the FORMAT command has opcode 0x04, just like with SCSI.
According to http://www.bitsavers.org/pdf/ansi/X3T9/X3T9.3_185_RevE_SASI_Apr82.pdf the FORMAT command has opcode 0x04, just like with SCSI.