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Date:      Mon, 8 May 2000 14:18:07 +0200
From:      Farid Hajji <farid.hajji@ob.kamp.net>
To:        questions@freebsd.org, schilling@fokus.gmd.de
Subject:   cdrecord, freebsd and atapi cd-writers
Message-ID:  <200005081218.e48CI7p00512@mail-ob.kamp.net>

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Hello,

I'm currently trying to figure out how to use cdrecord
on FreeBSD with an atapi (ide) cd-writer. My setup is:

Operating System: FreeBSD 3.4-RELEASE
Cdrecord-Version: Cdrecord release 1.8a33
Hardware        : /dev/wd0s1      Primary IDE-Disk
                  /dev/da0s1      Internal SCSI-Disk on an ahc0
                  /dev/acd0       IDE-CDROM
                  /dev/acd1       ATAPI CD-Writer (HP CD-Writer 7200+)

The relevant parts from dmesg are:

-------------- dmesg output -------------- dmesg output --------------------
ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x00 int a irq 12 on pci0.10.0
ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs

wdc0 at 0x1f0-0x1f7 irq 14 on isa

wdc0: unit 0 (wd0): <SAMSUNG SV0644A>
wd0: 6105MB (12504240 sectors), 13232 cyls, 15 heads, 63 S/T, 512 B/S

wdc0: unit 1 (atapi): <FX810T4/a01>, removable, intr, dma, iordis
acd0: drive speed 1377KB/sec, 256KB cache
acd0: supported read types: CD-DA
acd0: Audio: play, 255 volume levels
acd0: Mechanism: ejectable tray
acd0: Medium: no/blank disc inside, unlocked

wdc1 at 0x170-0x177 irq 15 on isa

wdc1: unit 0 (atapi): <HP      CD-Writer+ 7200/V:003.01>, removable, dma, iordy
acd1: drive speed 344 - 1034KB/sec, 768KB cache
acd1: supported read types: CD-R, CD-RW, CD-DA, packet track
acd1: supported write types: CD-R, CD-RW, test write
acd1: Audio: play, 128 volume levels
acd1: Mechanism: ejectable tray
acd1: Medium: no/blank disc inside, unlocked, lock protected

da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DORS-32160W WA6A> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 2063MB (4226725 512 byte sectors: 255H 63S/T 263C)
-------------- dmesg output -------------- dmesg output --------------------

I also enabled the pass0 device in the kernel config file.
Here the relevant parts:

-------------- relevant parts from kernel config file ----------------------
# ATAPI devices
options         ATAPI           #Enable ATAPI support for IDE bus
options         ATAPI_STATIC    #Don't do it as an LKM
device          acd0            #IDE CD-ROM

# SCSI Controllers
controller      ahc0            # AHA2940 and onboard AIC7xxx devices

# SCSI peripherals
controller      scbus0          # SCSI bus (required)
device          da0             # Direct Access (disks)
device          sa0             # Sequential Access (tape etc)
device          cd0             # CD
device          pass0           # Passthrough device (direct SCSI)

pseudo-device   vn      2       # mounting files as filesystems vnconfig(8)
-------------- relevant parts from kernel config file ----------------------

Still, I'm having trouble using cdrecord. AFAIK, cdrecord talks to
ATAPI Drives through some kind of SCSI over IDE and needs some scsi
passthrough or scsi-ide emulator. With my current setup, cdrecord -scanbus
returns:

bsdevil# cdrecord -scanbus
Cdrecord release 1.8a33 Copyright (C) 1995-1999 Jörg Schilling
Using libscg version 'schily-0.1'
scsibus0:
        0,0,0     0) 'IBM     ' 'DORS-32160W     ' 'WA6A' Disk
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *

The CD-Writer was not recognized there. I couldn't figure out
which dev=... to use for the /dev/acd1 cd-writer.

BTW, the writer works very well under Linux with the ide-scsi kernel-module
together with the generic scsi code 'sg'. The drive is recognized by
cdrecord in scsibus1 with the dev=1,0,0 line. The only quirck there was to
make sure, that the ide cd-writer was not grabbed at boot time by the ide
driver.

I'm sorry if this is a FAQ. I couldn't find any relevant information on
ATAPI CD-Writers, Cdrecord and FreeBSD.

Thank you for your help.

-Farid.

-- 
Farid Hajji
Broicherdorfstr. 83, D-41564 Kaarst, Germany
Phone: +49-2131-67-555, E-Mail: farid.hajji@ob.kamp.net


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