diff --git a/src/emu/machine/scsibus.c b/src/emu/machine/scsibus.c
index 72f667ec06d..e74384ac549 100644
--- a/src/emu/machine/scsibus.c
+++ b/src/emu/machine/scsibus.c
@@ -130,6 +130,7 @@ void scsibus_device::scsi_data_w( UINT8 data )
 		// only one line active.
 		case SCSI_PHASE_BUS_FREE:
 			last_id=scsibus_driveno(data);
+			sectorbytes = devices[last_id]->GetSectorBytes();
 			break;
 
 		case SCSI_PHASE_COMMAND:
@@ -690,11 +691,6 @@ int scsibus_device::get_scsi_cmd_len(int cbyte)
 	return 6;
 }
 
-void scsibus_device::init_scsibus(int _sectorbytes)
-{
-	sectorbytes = _sectorbytes;
-}
-
 scsibus_device::scsibus_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
     : device_t(mconfig, SCSIBUS, "SCSI bus", tag, owner, clock)
 {
diff --git a/src/emu/machine/scsibus.h b/src/emu/machine/scsibus.h
index 16db3015759..d4b082896a0 100644
--- a/src/emu/machine/scsibus.h
+++ b/src/emu/machine/scsibus.h
@@ -118,9 +118,6 @@ public:
 	DECLARE_WRITE_LINE_MEMBER( scsi_ack_w );
 	DECLARE_WRITE_LINE_MEMBER( scsi_rst_w );
 
-	/* Initialisation at machine reset time */
-	void init_scsibus(int sectorbytes);
-
 protected:
 	// device-level overrides
 	virtual void device_start();
diff --git a/src/emu/machine/scsicd.c b/src/emu/machine/scsicd.c
index b9fd87da85b..3d32e5ec890 100644
--- a/src/emu/machine/scsicd.c
+++ b/src/emu/machine/scsicd.c
@@ -773,3 +773,8 @@ void scsicd_device::SetDevice( void *_cdrom )
 {
 	cdrom = (cdrom_file *)_cdrom;
 }
+
+int scsicd_device::GetSectorBytes()
+{
+	return bytes_per_sector;
+}
diff --git a/src/emu/machine/scsicd.h b/src/emu/machine/scsicd.h
index 1f108e6de79..79189656072 100644
--- a/src/emu/machine/scsicd.h
+++ b/src/emu/machine/scsicd.h
@@ -23,6 +23,7 @@ public:
 	virtual void ExecCommand( int *transferLength );
 	virtual void WriteData( UINT8 *data, int dataLength );
 	virtual void ReadData( UINT8 *data, int dataLength );
+	virtual int GetSectorBytes();
 
 	static struct cdrom_interface cd_intf;
 
diff --git a/src/emu/machine/scsidev.c b/src/emu/machine/scsidev.c
index 42858e7830b..d49004e3f24 100644
--- a/src/emu/machine/scsidev.c
+++ b/src/emu/machine/scsidev.c
@@ -128,6 +128,11 @@ int scsidev_device::GetDeviceID()
 	return scsiID;
 }
 
+int scsidev_device::GetSectorBytes()
+{
+	return 0;
+}
+
 void scsidev_device::static_set_deviceid( device_t &device, int _scsiID )
 {
 	scsidev_device &scsidev = downcast<scsidev_device &>(device);
diff --git a/src/emu/machine/scsidev.h b/src/emu/machine/scsidev.h
index 8a3d4ca52c8..a66ede805df 100644
--- a/src/emu/machine/scsidev.h
+++ b/src/emu/machine/scsidev.h
@@ -24,6 +24,7 @@ public:
 	virtual void SetPhase( int phase );
 	virtual void GetPhase( int *phase );
 	virtual int GetDeviceID();
+	virtual int GetSectorBytes();
 
 	// configuration helpers
 	static void static_set_deviceid(device_t &device, int _scsiID);
diff --git a/src/emu/machine/scsihd.c b/src/emu/machine/scsihd.c
index 5c555b82980..d3beba65544 100644
--- a/src/emu/machine/scsihd.c
+++ b/src/emu/machine/scsihd.c
@@ -324,3 +324,8 @@ void scsihd_device::SetDevice( void *_disk )
 {
 	disk = (hard_disk_file *)_disk;
 }
+
+int scsihd_device::GetSectorBytes()
+{
+	return sectorbytes;
+}
diff --git a/src/emu/machine/scsihd.h b/src/emu/machine/scsihd.h
index 7dbe4a8a832..568f4f8a8e6 100644
--- a/src/emu/machine/scsihd.h
+++ b/src/emu/machine/scsihd.h
@@ -23,6 +23,7 @@ public:
 	virtual void ExecCommand( int *transferLength );
 	virtual void WriteData( UINT8 *data, int dataLength );
 	virtual void ReadData( UINT8 *data, int dataLength );
+	virtual int GetSectorBytes();
 
 protected:
 	// device-level overrides
diff --git a/src/mess/drivers/bullet.c b/src/mess/drivers/bullet.c
index 5cc349cfc7c..a6ea30c57c6 100644
--- a/src/mess/drivers/bullet.c
+++ b/src/mess/drivers/bullet.c
@@ -1102,9 +1102,6 @@ void bullet_state::machine_start()
 
 void bulletf_state::machine_start()
 {
-	// initialize SASI bus
-	m_scsibus->init_scsibus(512);
-
 	// state saving
 	save_item(NAME(m_fdrdy));
 	save_item(NAME(m_rome));
diff --git a/src/mess/drivers/v1050.c b/src/mess/drivers/v1050.c
index f7f0c48ec0d..fb9cad78936 100644
--- a/src/mess/drivers/v1050.c
+++ b/src/mess/drivers/v1050.c
@@ -1022,9 +1022,6 @@ void v1050_state::machine_start()
 {
 	address_space &program = m_maincpu->space(AS_PROGRAM);
 
-	// initialize SASI bus
-	m_sasibus->init_scsibus(256);
-
 	// initialize I8214
 	m_pic->etlg_w(1);
 	m_pic->inte_w(1);
diff --git a/src/mess/machine/d9060.c b/src/mess/machine/d9060.c
index e251e3ae196..1350e465635 100644
--- a/src/mess/machine/d9060.c
+++ b/src/mess/machine/d9060.c
@@ -560,8 +560,6 @@ void base_d9060_device::device_start()
 
 void base_d9060_device::device_reset()
 {
-	m_sasibus->init_scsibus(256);
-
 	m_maincpu->set_input_line(M6502_SET_OVERFLOW, ASSERT_LINE);
 	m_maincpu->set_input_line(M6502_SET_OVERFLOW, CLEAR_LINE);
 
diff --git a/src/mess/machine/e01.c b/src/mess/machine/e01.c
index 2cac1732a7e..b5d5aa2b1a8 100644
--- a/src/mess/machine/e01.c
+++ b/src/mess/machine/e01.c
@@ -557,8 +557,6 @@ void e01_device::device_start()
 
 void e01_device::device_reset()
 {
-	m_scsibus->init_scsibus(512);
-
 	m_clk_timer->adjust(attotime::zero, 0, attotime::from_hz(200000));
 
 	membank("bank1")->set_entry(1);
diff --git a/src/mess/machine/lux4105.c b/src/mess/machine/lux4105.c
index 287fa3985e5..f1954dff053 100644
--- a/src/mess/machine/lux4105.c
+++ b/src/mess/machine/lux4105.c
@@ -206,8 +206,6 @@ void luxor_4105_device::device_start()
 
 void luxor_4105_device::device_reset()
 {
-	m_sasibus->init_scsibus(512);
-
 	m_cs = 0;
 	m_data = 0;
 	m_dma = 0;
diff --git a/src/mess/machine/rmnimbus.c b/src/mess/machine/rmnimbus.c
index 3df7947108d..94aca444667 100644
--- a/src/mess/machine/rmnimbus.c
+++ b/src/mess/machine/rmnimbus.c
@@ -2423,8 +2423,6 @@ static void hdc_reset(running_machine &machine)
 	rmnimbus_state *state = machine.driver_data<rmnimbus_state>();
 	scsibus_device *hdc = machine.device<scsibus_device>(SCSIBUS_TAG);
 
-    hdc->init_scsibus(512);
-
     state->m_nimbus_drives.reg410_in=0;
     state->m_nimbus_drives.reg410_in |= (hdc->get_scsi_line(SCSI_LINE_REQ) ? HDC_REQ_MASK : 0);
     state->m_nimbus_drives.reg410_in |= (hdc->get_scsi_line(SCSI_LINE_CD)  ? HDC_CD_MASK  : 0);