How can I use BD-RE with UFS on geli?

[SAITOU Toshihide]

In message: <20090412.134212.260812222.toshi at ruby.ocn.ne.jp>
            SAITOU Toshihide <toshi at ruby.ocn.ne.jp> writes:
> I tried BD-RE with UFS on geli but didn't success.
> What was wrong the below?

P.S.  BD-RE with UFS is the same result (not usable).


1. format the disk

   dvd+rw-format is failed but after this step the disk is
   newfs-able.

   # diskinfo -v /dev/acd0
   /dev/acd0
           2048            # sectorsize
           8796093020160   # mediasize in bytes (8.0T)
           4294967295      # mediasize in sectors

   # kldload atapicam
   # dvd+rw-format /dev/cd0
   # kldunload atapicam

   # diskinfo -v /dev/acd0 
   /dev/acd0
           2048            # sectorsize
           24220008448     # mediasize in bytes (23G)
           11826176        # mediasize in sectors

2. newfs

   # newfs /dev/acd0

   the following message was detected:

   kernel: acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x11 ascq=0x05 


3. glabel and mount


but the disk access frequently failed with these messages
(offset and length is not always the same):

kernel: acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x11 ascq=0x05 
kernel: g_vfs_done():label/DailyBackup[READ(offset=2697789440, length=16384)]error = 5

----
SAITOU Toshihide