[wonder@laptop ~]$ sudo hdparm -I /dev/sr0

/dev/sr0:

ATAPI CD-ROM, with removable media
	Model Number:       TSSTcorp DVD+/-RW TS-L632H              
	Serial Number:      
	Firmware Revision:  D300    
Standards:
	Supported: CD-ROM ATAPI-3 -4 -5 -6 -7 
Configuration:
	DRQ response: 50us.
	Packet size: 12 bytes
Capabilities:
	LBA, IORDY(can be disabled)
	DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 
	     Cycle time: min=120ns recommended=120ns
	PIO: pio0 pio1 pio2 pio3 pio4 
	     Cycle time: no flow control=383ns  IORDY flow control=120ns
Commands/features:
	Enabled	Supported:
	   *	Power Management feature set
	   *	PACKET command feature set
	   *	DEVICE_RESET command
	   *	NOP cmd
HW reset results:
	CBLID- below Vih
	Device num = 0 determined by CSEL