missing partitions under /dev

Sat Jun 11 14:05:00 GMT 2016

On Jun 10 16:59, Aaron Schneider wrote:
> > Date: 2016年6月10日 12:00:27 +0200
> > From: corinna-cygwin@cygwin.com
> >
> > Cygwin's /dev/sd* emulation doesn't support more than 15 partitions yet.
> > This would need some rework of the device naming code.
> >
> >
> > Corinna
>> I see. I though that it was a Windows problem that didn't provide
> the partitions properly to cygwin if they weren't formatted with a
> known filesystem or something related. 
>> Isn't any other way to access those partitions even from Windows 
> Powershell?

There may be a way even using Cygwin. If you know which disk X it is,
you could try accessing it via /proc/sys/Device/HarddiskX/PartitionY.
No guarantee but for raw access this might be sufficient.
> Is the feature to support more than 15 partition planned
> to be implemented? 		 	 		 

I looked into that and theoretically the changes are small.
However, there's an undesired side-effect. The device parser code uses
an auto-generated minimally pruned 0-trie, created by a tool called
shilka. The problem is that the resulting object file is already very
big, compared to the rest of the DLL. Amazing but true, about 20% of
the object file is just this trie code and its data, whihc, IMHO, is
already quite bad. By adding support for partitions 16-63, this object
code gets 2.5 times bigger!
This is way too much, and I think what we have to do first is to 
replace this autogenerated 0-trie code by some simpler, hand-written
parser before we can consider adding support for more partitions.
Corinna
-- 
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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