Forcing DVD/CD speed down to 1x

[Daniel Martini <dmartini_(_at_)_uni-hohenheim_(_dot_)_de>]

Hi,

Just built in my new DVD drive. Problem is:
While playing audio CDs using e.g. cdio it's very quiet, but when
playing Video DVD using mplayer, it gets horribly loud. I get the
impression, it is running at full speed, although this would probably
not be neccessary.

Reading mplayer's docu, I came across this file:
/usr/local/share/doc/mplayer/drives.html
where they describe how to force down the rotational speed of a CD-Rom
drive on Linux using hdparm and on FreeBSD using cdcontrol.

Now OpenBSD has neither hdparm nor cdcontrol. Question is: Is there
a command for achieving a slower CD/DVD rotational speed? (scsi(8)
comes to mind, but I couldn't figure out of the manpage how to do it).

Regards,
Daniel

Oh, and just in case, dmesg (GENERIC 3.6 release):

OpenBSD 3.6 (GENERIC) #59: Fri Sep 17 12:32:57 MDT 2004
    deraadt_(_at_)_i386_(_dot_)_openbsd_(_dot_)_org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: VIA Nehemiah ("CentaurHauls" 686-class) 1.20 GHz
cpu0: FPU,DE,PSE,TSC,MSR,MTRR,PGE,CMOV,MMX,FXSR,SSE
cpu0: RNG
real mem  = 251174912 (245288K)
avail mem = 222310400 (217100K)
using 3091 buffers containing 12660736 bytes (12364K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(2f) BIOS, date 03/11/03, BIOS32 rev. 0 @ 0xfb070
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev 2.1 @ 0xf0000/0xdf44
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfded0/112 (5 entries)
pcibios0: PCI Exclusive IRQs: 5 11
pcibios0: no compatible PCI ICU found
pcibios0: Warning, unable to fix up PCI interrupt routing
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xc000
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "VIA VT8623 PCI" rev 0x00
ppb0 at pci0 dev 1 function 0 "VIA VT8633 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "VIA CLE266" rev 0x03: aperture at 0xd8000000, size 0x10000000
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"ATI Radeon VE QY" rev 0x00 at pci0 dev 8 function 0 not configured
uhci0 at pci0 dev 16 function 0 "VIA VT83C572 USB" rev 0x80: irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 16 function 1 "VIA VT83C572 USB" rev 0x80: irq 5
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2 at pci0 dev 16 function 2 "VIA VT83C572 USB" rev 0x80: irq 5
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
ehci0 at pci0 dev 16 function 3 "VIA VT6202 USB 2.0" rev 0x82: irq 11
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2
usb3 at ehci0: USB revision 2.0
uhub3 at usb3
uhub3: VIA EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
pcib0 at pci0 dev 17 function 0 "VIA VT8235 ISA" rev 0x00
pciide0 at pci0 dev 17 function 1 "VIA VT82C571 IDE" rev 0x06: ATA133, channel 0 configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <SAMSUNG SV0802N>
wd0: 16-sector PIO, LBA48, 76351MB, 156368016 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 6
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <TOSHIBA, DVD-ROM SD-M1912, TM00> SCSI0 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
auvia0 at pci0 dev 17 function 5 "VIA VT8233 AC97" rev 0x50: irq 5
ac97: codec id 0x49434552 (ICEnsemble <52>)
ac97: codec features headphone, 18 bit DAC, 18 bit ADC, KS Waves 3D
audio0 at auvia0
vr0 at pci0 dev 18 function 0 "VIA RhineII-2" rev 0x74: irq 11 address 00:40:63:d4:3c:91
ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface
ukphy0: OUI 0x004063, model 0x0032, rev. 8
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pmsi0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pmsi0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask ef65 netmask ef65 ttymask ffe7
pctr: user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302