linux-kernel - Linux UDF support

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Message-Id: <201408241446.47042@pali>
Date:	Sun, 24 Aug 2014 14:46:46 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org
Subject: Linux UDF support

Hi,

I would like to know what is state of linux UDF driver. It is 
experimental or is now suitable for storing data?

According to wikipedia [1] UDF has open specification format and 
can be used also for HDDs (not only optical discs).

In OS support table is written that all major and other minor OSs 
support UDF FS (without needs for additional programs).

So it looks like UDF is good candidate for multi OS filesystem. 
Are there any disadvantages for using UDF on e.g USB flash disk? 
(when I want read/write support on Linux, Windows 7 and Mac OS X)

Because lot of manuals say that FAT32 (or NTFS) is only one 
solution for using USB flash disk on more OS.

On wikipedia there is one note about linux: Write support is only 
up to UDF version 2.01. Is this restriction still valid?

What will happen if I try to mount FS with UDF version 2.60 in 
R/W mode on linux? It will fallback to R/O mode? Or newly written 
files will be in previous (2.01) versions?

And last question: Is there some fsck tool for UDF? Or at least 
tool which print if FS is in inconsistent state?

[1] - http://en.wikipedia.org/wiki/Universal_Disk_Format

-- 
Pali Rohár
pali.rohar@...il.com

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