====== growisofsでdvdを焼けない ======
<code>
# growisofs -Z /dev/dvd=F-7-x86_64-DVD.iso
:-( unable to anonymously mmap 33554432: Resource temporarily unavailable
</code>
と出るので、
<code>
# ulimit -l unlimited
</code>
としてから、もう一度実行。
<code>
# growisofs -Z /dev/dvd=F-7-x86_64-DVD.iso
Executing 'builtin_dd if=F-7-x86_64-DVD.iso of=/dev/dvd obs=32k seek=0'
/dev/dvd: "Current Write Speed" is 2.0x1352KBps.
   17891328/2381230080 ( 0.8%) @2.1x, remaining 15:24 RBU 100.0% UBU   2.0%
   27394048/2381230080 ( 1.2%) @2.1x, remaining 14:19 RBU 100.0% UBU 100.0%
   36896768/2381230080 ( 1.5%) @2.1x, remaining 14:49 RBU 100.0% UBU 100.0%
   ...
   2357067776/2381230080 (99.0%) @2.1x, remaining 0:08 RBU 100.0% UBU 100.0%
   2366603264/2381230080 (99.4%) @2.1x, remaining 0:05 RBU  87.3% UBU 100.0%
   2376105984/2381230080 (99.8%) @2.1x, remaining 0:01 RBU  30.7% UBU 100.0%
builtin_dd: 1162720*2KB out @ average 2.1x1352KBps
/dev/dvd: flushing cache
/dev/dvd: updating RMA
/dev/dvd: closing session
</code>

==== デバイスの確認 ====
=== /proc/scsi/scsi ===
<code>
$ cat /proc/scsi/scsi
</code>
<code>
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD10EZEX-00R Rev: 80.0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD10EZEX-00R Rev: 80.0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD10EZEX-00R Rev: 80.0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi3 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: Samsung SSD 840  Rev: DXT0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi4 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: Samsung SSD 840  Rev: DXT0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi5 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: Samsung SSD 840  Rev: DXT0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi6 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: Samsung SSD 840  Rev: DXT0
  Type:   Direct-Access                    ANSI  SCSI revision: 05
Host: scsi7 Channel: 00 Id: 00 Lun: 00
  Vendor: PIONEER  Model: BD-RW   BDR-208M Rev: 1.10
  Type:   CD-ROM                           ANSI  SCSI revision: 05
</code>

=== dmesg ===
<code>
$ dmesg | grep sr0
</code>
<code>
[    1.962695] sr0: scsi3-mmc drive: 125x/125x writer dvd-ram cd/rw xa/form2 cdda tray
[    1.962896] sr 7:0:0:0: Attached scsi CD-ROM sr0
</code>

=== hdparm ===
<code>
$ sudo hdparm -I /dev/sr0 
</code>
※hdparm コマンドが存在しない場合は sudo yum install hdparm でインストールする。
<code>
/dev/sr0:

ATAPI CD-ROM, with removable media
	Model Number:       PIONEER BD-RW   BDR-208M                
	Serial Number:      MADL010201WL       
	Firmware Revision:  1.10    
Standards:
	Likely used CD-ROM ATAPI-1
Configuration:
	DRQ response: 50us.
	Packet size: 12 bytes
	cache/buffer size  = unknown
Capabilities:
	LBA, IORDY(can be disabled)
	Buffer size: 64.0kB
	DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 
	     Cycle time: min=120ns recommended=120ns
	PIO: pio0 pio1 pio2 pio3 pio4 
	     Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
	Enabled	Supported:
	   *	Power Management feature set
	   *	PACKET command feature set
	   *	DEVICE_RESET command
	   *	NOP cmd
	   *	Gen1 signaling speed (1.5Gb/s)
	    	Device-initiated interface power management
	    	Asynchronous notification (eg. media change)
	   *	Software settings preservation
</code>