cdrecord hangs hen accessing the drive

[CeDeROM]

Hello :-)

I have noted a problem with accessing the optical disk recorders with
cdrecord - it gets stuck at start and cannot be killed (-9), probably
at the device access/detect stage. Any hints welcome :-)

# cdrecord -scanbus
Cdrecord-ProDVD-ProBD-Clone 3.00 (amd64-unknown-freebsd10.0) Copyright
(C) 1995-2010 J�rg Schilling
Using libscg version 'schily-0.9'.
scsibus0:
0,0,0  0) 'ASUS    ' 'DRW-22B2L       ' '1.02' Removable CD-ROM
0,1,0  1) 'LG      ' 'CD-RW CED-8120B ' '1.02' Removable CD-ROM
0,2,0  2) *
0,3,0  3) *
0,4,0  4) *
0,5,0  5) *
0,6,0  6) *
0,7,0  7) *
scsibus4:
4,0,0 400) '' '' '' NON CCS Disk
4,1,0 401) *
4,2,0 402) *
4,3,0 403) *
4,4,0 404) *
4,5,0 405) *
4,6,0 406) *
4,7,0 407) *
scsibus6:
6,0,0 600) '' '' '' NON CCS Disk
6,1,0 601) 'PIONEER ' 'BD-RW   BDR-208D' '1.10' Removable CD-ROM
6,2,0 602) *
6,3,0 603) *
6,4,0 604) *
6,5,0 605) *
6,6,0 606) *
6,7,0 607) *
scsibus8:
8,0,0 800) 'Generic ' 'USB SD Reader   ' '1.00' Removable Disk
8,1,0 801) *
8,2,0 802) *
8,3,0 803) *
8,4,0 804) *
8,5,0 805) *
8,6,0 806) *
8,7,0 807) *
scsibus9:
9,0,0 900) 'MBED.ORG' 'MBED USB DISK   ' '1.0 ' Removable Disk
9,1,0 901) *
9,2,0 902) *
9,3,0 903) *
9,4,0 904) *
9,5,0 905) *
9,6,0 906) *
9,7,0 907) *

# cdrecord -dev=6,1,0 -blank=fast
Cdrecord-ProDVD-ProBD-Clone 3.00 (amd64-unknown-freebsd10.0) Copyright
(C) 1995-2010 J�rg Schilling
scsidev: '6,1,0'
scsibus: 6 target: 1 lun: 0
^C^C^C^C
^C^C^C^C
^C
^C^C

^C^C
^C^C^C
^C^C^C^C^C^C

# dmesg | tail -2
WARNING: attempt to domain_add(bluetooth) after domainfinalize()
ata0: already running!

# uname -a
FreeBSD hexagon 10.0-RELEASE FreeBSD 10.0-RELEASE #0 r260789: Thu Jan
16 22:34:59 UTC 2014
root at snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info