Xenix FS history lesson please

[James Knott]

Lennart Sorensen wrote:
> On Thu, Feb 21, 2008 at 08:46:28PM -0500, Madison Kelly wrote:
>   
>> I've been trying to get some documentation done on my program, and I 
>> want to have a section on the various file systems. However, I am having 
>> next to no luck finding information on, or the differences between, the 
>> Xenix '/root' and '/usr' filesystems. I even looked up the old Xenix 
>> programming manual (closest I could find to a sysadmin doc) from 1979, 
>> but could not find the differences.
>>
>> Anyone here remember anything about those filesystems? (IDs 02h [Xenix 
>> /root] and 03h [Xenix /usr])
>>
>> I'm not worried so much about nitty gritty details, just a high-level 
>> idea of what they were and what the differences between those two were.
>>     
>
> They might be the same filesystem, but use different partition IDs to
> tell the boot loader or kernel which is which.  Microsoft used to think
> partition IDs were a good way to tell what kind of partition it was
> after all.

Which is, of course, why they used the same ID for NTFS, as was already 
used for HPFS. ;-)


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