Hello,
I am facing this exact same problem but with an additional complication:
My SuperDrive is powered-up and appears in the device list on my iMac (27-inch 2009 late) but it does not read any CD / DVD
* I tried to verify and repair disc. Verification completed, repair button is unavailable.
Can you identify any problems bellow? Any suggestions / recommendations?
aldo:~ Bigimotik$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 900.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data BOOTCAMP 99.0 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *4.0 GB disk1
1: DOS_FAT_32 WIN7 4.0 GB disk1s1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *4.0 GB disk2
1: DOS_FAT_32 WININSTALL 4.0 GB disk2s1
aldo:~ Bigimotik$ diskutil cs list
sudo gpt -vv -r show /dev/disk0
sudo gpt -vv -r show /dev/disk1
sudo fdisk /dev/disk0
sudo fdisk /dev/disk1
No CoreStorage logical volume groups found
aldo:~ Bigimotik$ sudo gpt -vv -r show /dev/disk0
gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 1953525167
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 1758486576 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
1758896216 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1760165752 136
1760165888 193357824 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1953523712 1423
1953525135 32 Sec GPT table
1953525167 1 Sec GPT header
aldo:~ Bigimotik$ sudo gpt -vv -r show /dev/disk1
gpt show: /dev/disk1: mediasize=4026531840; sectorsize=512; blocks=7864320
gpt show: /dev/disk1: MBR at sector 0
start size index contents
0 1 MBR
1 63
64 7864256 1 MBR part 11
aldo:~ Bigimotik$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>
2: AF 1023 254 63 - 1023 254 63 [ 409640 - 1758486576] HFS+
3: AB 1023 254 63 - 1023 254 63 [1758896216 - 1269536] Darwin Boot
4: 0B 1023 254 63 - 1023 254 63 [1760165888 - 193357824] Win95 FAT-32
aldo:~ Bigimotik$ sudo fdisk /dev/disk1
Disk: /dev/disk1 geometry: 975/128/63 [7864320 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
*1: 0B 0 1 1 - 1023 1 63 [ 64 - 7864256] Win95 FAT-32
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused