Disk 1 i think is the nifty sd card holder and yes it is kept permanently in.
diskutil cs list gives no corestorage logical volume groups found
Grahams-MacBook-Pro:~
grahamharborne$ sudo gpt -vv -r show /dev/disk0
gpt
show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752
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 490234751
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 390899896 2 GPT part -
48465300-0000-11AA-AA11-00306543ECAC
391309536 1269536 3 GPT part -
426F6F74-0000-11AA-AA11-00306543ECAC
392579072 97654784 4 GPT part -
EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
490233856 863
490234719 32 Sec GPT
table
490234751 1 Sec
GPT header
Grahams-MacBook-Pro:~
grahamharborne$ sudo fdisk /dev/disk0
Disk:
/dev/disk0 geometry:
30515/255/63 [490234752 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 - 390899896]
HFS+
3:
AB 1023 254 63 - 1023 254 63 [ 391309536 - 1269536]
Darwin Boot
4:
0C 1023 254 63 - 1023 254 63 [ 392579072 - 97654784] Win95
FAT32L