you can have as many partitions as letters in the english alfabet. exept A and B. those are old Floby drives. it sux that you cant use them for partitions.
In theory you could use A , B for drives it is just that the windows os's reserve these labels by default for the floppy 1 , 2 drives.
If you where using linux you could assign them a or b or what every you want (i.e mount /dev/hda1 /media/A ) ,...etc
The labels A , B , C ,..etc are just default volume labels you can change them in windows as well. (think of the volume labels as the linux equivalent of mount points they are really the same microsoft has mountvol
I am also wondering is their any limit on the amount of extended partitions you can create on a harddisk?
For primary partitions it is 4.
I also think that you are wrong in saying that their is not a limit on the number of logical partitions in a extended partitions because after 15 or so I tried to create another logical inside my extended and gpart is throwing errors. So their must be a limit on these as well.
Curious if anybody knows a little more about partitioning.
And what gets written out to the disk when creating a primary or extended partition.
I believe it is just in the mbr partition table but if somebody knows for sure can they please explain.