was 'extened partition' designed a little complex?

[miaowei]

i doubt that 'extend partition' was disigned a little complex.
why not we take EBR(extended boot record) as the first sector of a logical partition ? Then, we can get a more pure 'link list'.
Is there a reason to do a secondary positioning by reading the first entry of partition-table in EBR?

[Octocontrabass]

The first sector of the logical partition already belongs to the filesystem in that partition, so it cannot be combined with the EBR.

[miaowei]

The first sector of the logical partition already belongs to the filesystem in that partition, so it cannot be combined with the EBR.

Excuse me, as far as i know, filesystem seldoms touchs the first sector of a device(or partition), thier superblock usually starts from 1K。

[Octocontrabass]

Extended partitions were designed to work in DOS, which uses FAT. FAT places the superblock in the first sector of the partition, so the EBR cannot be located there.

[miaowei]

Extended partitions were designed to work in DOS, which uses FAT. FAT places the superblock in the first sector of the partition, so the EBR cannot be located there.

Great!
I will take a look at FAT.