Laszlo,
I may not state the problem very clearly.
I saw two problems:
1. ParitionDxe shouldn't create BLK handle for the entire media again. Our QA 
complains
     several new but unexpected BLK devices are seen. This bug is easy to fix 
and needs to
     be fixed ASAP. So I created a BZ 
(https://bugzilla.tianocore.org/show_bug.cgi?id=707).

2. PartitionDxe should handle multiple LVDs in a UDF CDROM. No one complains 
this.
     I am fine to accept the limitation. So I even didn't create a BZ.
     Anyone who wants this support can submit a BZ.
     I guess following the same pattern of existing code to support it should 
be easy.

Thanks,
Ray

-----Original Message-----
From: Laszlo Ersek [mailto:ler...@redhat.com] 
Sent: Friday, September 15, 2017 7:03 PM
To: Ni, Ruiyu <ruiyu...@intel.com>; Paulo Alcantara <pca...@zytor.com>; Yao, 
Jiewen <jiewen....@intel.com>
Cc: Wu, Hao A <hao.a...@intel.com>; edk2-devel@lists.01.org; Zeng, Star 
<star.z...@intel.com>
Subject: Re: [edk2] Functionality issues in UDF support

On 09/15/17 09:38, Ni, Ruiyu wrote:
> Paulo,
> Supporting multiple LVDs can be considered as a long-term task, or can 
> be added per request.
> But I think a urgent fix in PartitionDxe driver is to:
> 1. create child BLK only for the portion covered by the LVD 2. Do not 
> create child BLK for LVD that's actually an Eltorito LVD
> 
> I submitted a Bugzilla to record this:
> https://bugzilla.tianocore.org/show_bug.cgi?id=707

Ray,

from the discussion it looks like the issue only hits with multi-volume media. 
Paulo stated he had never seen such media. Can you share your reproducer media 
perhaps (even privately, if it can be done legally), or else provide 
instructions to create, or obtain, such media?

Thanks!
Laszlo
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