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Originally Posted by BSDfan666
.. an extended partition is essentially a link to an additional partition table that again can have an additional 3 primary, 1 extended partition. (..this can keep going for quite a bit unfortunately.).
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These partition tables inside the extended partition will generally define just one usable "logical partition", two empties and a pointer to the next one, so they form a linked list. (My desciption is a bit loose, but that's the gist of it.) The logical partitions can't be used as a primary partition for things that
really need a primary partition ... there are just 3 (or 4) of those on the disk in the MBR partition table.
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OpenBSD 4.5 supports being installed on extended partitions now ...
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Interesting, didn't know that or had forgotten!
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OpenBSD creates "fictitious" disklabel entries for foreign partitions it finds.. but I have not confirmed that it recurses through extended partition tables.
Can anyone comment on this? I never install more then one operating system on my computer.
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Yes, I believe that it does. Today I'm running NetBSD and here is my disklabel:
Code:
16 partitions:
# size offset fstype [fsize bsize cpg/sgs]
a: 5278896 10763550 4.2BSD 2048 16384 0 # (Cyl. 10678*- 15915*)
b: 263529 16042446 swap # (Cyl. 15915*- 16176*)
c: 5542425 10763550 unused 0 0 # (Cyl. 10678*- 16176*)
d: 80418240 0 unused 0 0 # (Cyl. 0 - 79779)
g: 273042 63 Linux Ext2 0 0 # (Cyl. 0*- 270*)
h: 10490445 273105 Linux Ext2 0 0 # (Cyl. 270*- 10678*)
i: 626472 16306038 Linux Ext2 0 0 # (Cyl. 16176*- 16798*)
j: 6313482 16932573 Linux Ext2 0 0 # (Cyl. 16798*- 23061*)
k: 5943987 23246118 Linux Ext2 0 0 # (Cyl. 23061*- 28958*)
l: 10506447 29190168 Linux Ext2 0 0 # (Cyl. 28958*- 39381*)
m: 20370357 39696678 Linux Ext2 0 0 # (Cyl. 39381*- 59590*)
n: 20338227 60067098 Linux Ext2 0 0 # (Cyl. 59590*- 79767*)
ISTR that OpenBSD can do about the same.