I have no idea what's causing this, but I'm experiencing what I can best
describe as "noise" coming over the PCI bus. At least, that's my guess. For
example, it's happening under the following circumstances:

root is on wd0a (SATA, onboard viaide)
anoncvs mirror is on wd1a (SATA, onboard viaide)
music is on wd2a (ATA100, onboard viaide)

sound card is a PCI SB Live! 5.1. I have an onboard auvia, but for various
reasons (such as support for it being even worse than support for emuxki), I
don't use it.

When I was playing .flac's from a directory on wd2a, and did an rm -rf of
the anoncvs mirror, the music started getting distorted. Not skipping, but
getting staticy.

Any ideas?

dmesg.boot follows, in case it helps.

NetBSD 2.99.14 (JANE) #35: Sat Jan 15 16:04:25 EST 2005
	dive@jane.endersgame.net:/sys/arch/i386/compile/JANE
total memory = 1023 MB
avail memory = 999 MB
BIOS32 rev. 0 found at 0xf0010
PCI BIOS rev. 2.1 found at 0xf0031
PCI IRQ Routing Table rev. 1.0 found at 0xf3f40, size 192 bytes (10 entries)
PCI Interrupt Router at 000:17:0 (vendor 0x1106 product 0x3227 compatible)
mainbus0 (root)
cpu0 at mainbus0: (uniprocessor)
cpu0: AMD Athlon XP 2700+ (686-class), 2166.64 MHz, id 0x681
cpu0: features c3c3fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features c3c3fbff<PGE,MCA,CMOV,PAT,PSE36,MMXX,MMX>
cpu0: features c3c3fbff<FXSR,SSE,3DNOW2,3DNOW>
cpu0: "AMD Athlon(tm) XP 2700+"
cpu0: I-cache 64 KB 64B/line 2-way, D-cache 64 KB 64B/line 2-way
cpu0: L2 cache 256 KB 64B/line 16-way
cpu0: ITLB 16 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: DTLB 32 4 KB entries fully associative, 8 4 MB entries 4-way
cpu0: 8 page colors
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: vendor 0x1106 product 0x0269 (rev. 0x00)
agp0 at pchb0: aperture at 0xe0000000, size 0xe500000
pchb1 at pci0 dev 0 function 1
pchb1: vendor 0x1106 product 0x1269 (rev. 0x00)
pchb2 at pci0 dev 0 function 2
pchb2: vendor 0x1106 product 0x2269 (rev. 0x00)
pchb3 at pci0 dev 0 function 3
pchb3: vendor 0x1106 product 0x3269 (rev. 0x00)
pchb4 at pci0 dev 0 function 4
pchb4: vendor 0x1106 product 0x4269 (rev. 0x00)
pchb5 at pci0 dev 0 function 7
pchb5: vendor 0x1106 product 0x7269 (rev. 0x00)
ppb0 at pci0 dev 1 function 0: vendor 0x1106 product 0xb198 (rev. 0x00)
pci1 at ppb0 bus 2
pci1: i/o space, memory space enabled
vga0 at pci1 dev 0 function 0: vendor 0x1002 product 0x5961 (rev. 0x01)
wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
vendor 0x1002 product 0x5941 (miscellaneous display, revision 0x01) at pci1 dev 0 function 1 not configured
pdcide0 at pci0 dev 10 function 0
pdcide0: Promise Ultra100TX2/ATA Bus Master IDE Accelerator (rev. 0x02)
pdcide0: bus-master DMA support present
pdcide0: primary channel configured to native-PCI mode
pdcide0: using irq 5 for native-PCI interrupt
atabus4 at pdcide0 channel 0
pdcide0: secondary channel configured to native-PCI mode
atabus5 at pdcide0 channel 1
emuxki0 at pci0 dev 11 function 0: vendor 0x1102 product 0x0002 (audio multimedia, revision 0x07)
emuxki0: ac97: SigmaTel STAC9708 codec; 18 bit DAC, 18 bit ADC, SigmaTel 3D
emuxki0: ac97: ext id 80<SDAC>
audio0 at emuxki0: full duplex, mmap, independent
emuxki0: interrupting at irq 3
vendor 0x1102 product 0x7002 (miscellaneous input, revision 0x07) at pci0 dev 11 function 1 not configured
ppb1 at pci0 dev 13 function 0: vendor 0x1014 product 0x0022 (rev. 0x01)
pci2 at ppb1 bus 1
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
tl0 at pci2 dev 0 function 0
tl0: Compaq Dual Port Netelligent 10/100 TX
tl0: Ethernet address 00:08:c7:a4:a9:40
tl0: interrupting at irq 10
nsphy0 at tl0 phy 1: DP83840 10/100 media interface, rev. 1
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlphy0 at tl0 phy 31: ThunderLAN 10BASE-T media interface, rev. 5
tlphy0: 10base5
tl1 at pci2 dev 1 function 0
tl1: Compaq Dual Port Netelligent 10/100 TX
tl1: Ethernet address 00:08:c7:a4:a9:c0
tl1: interrupting at irq 5
nsphy1 at tl1 phy 1: DP83840 10/100 media interface, rev. 1
nsphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlphy1 at tl1 phy 31: ThunderLAN 10BASE-T media interface, rev. 5
tlphy1: 10base5
viaide0 at pci0 dev 15 function 0
viaide0: VIA Technologies VT8237 SATA Controller (rev. 0x80)
viaide0: bus-master DMA support present
viaide0: primary channel wired to native-PCI mode
viaide0: using irq 10 for native-PCI interrupt
atabus0 at viaide0 channel 0
viaide0: secondary channel wired to native-PCI mode
atabus1 at viaide0 channel 1
viaide1 at pci0 dev 15 function 1
viaide1: VIA Technologies VT8237 ATA133 controller
viaide1: bus-master DMA support present
viaide1: primary channel configured to compatibility mode
viaide1: primary channel interrupting at irq 14
atabus2 at viaide1 channel 0
viaide1: secondary channel configured to compatibility mode
viaide1: secondary channel interrupting at irq 15
atabus3 at viaide1 channel 1
uhci0 at pci0 dev 16 function 0: vendor 0x1106 product 0x3038 (rev. 0x81)
uhci0: interrupting at irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: vendor 0x1106 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: vendor 0x1106 product 0x3038 (rev. 0x81)
uhci1: interrupting at irq 11
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: vendor 0x1106 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: vendor 0x1106 product 0x3038 (rev. 0x81)
uhci2: interrupting at irq 10
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: vendor 0x1106 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhci3 at pci0 dev 16 function 3: vendor 0x1106 product 0x3038 (rev. 0x81)
uhci3: interrupting at irq 10
usb3 at uhci3: USB revision 1.0
uhub3 at usb3
uhub3: vendor 0x1106 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 2 ports with 2 removable, self powered
ehci0 at pci0 dev 16 function 4: vendor 0x1106 product 0x3104 (rev. 0x86)
ehci0: interrupting at irq 5
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2 uhci3
usb4 at ehci0: USB revision 2.0
uhub4 at usb4
uhub4: vendor 0x1106 EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub4: single transaction translator
uhub4: 8 ports with 8 removable, self powered
pcib0 at pci0 dev 17 function 0
pcib0: vendor 0x1106 product 0x3227 (rev. 0x00)
vr0 at pci0 dev 18 function 0: VIA VT6102 (Rhine II) 10/100 Ethernet
vr0: interrupting at irq 11
vr0: Ethernet address: 00:0b:6a:75:ed:c5
ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface
ukphy0: OUI 0x0002c6, model 0x0032, rev. 10
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
isa0 at pcib0
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0-0xff: using exception 16
uhidev0 at uhub3 port 2 configuration 1 interface 0
uhidev0: Logitech USB-PS/2 Optical Mouse, rev 2.00/11.10, addr 2, iclass 3/1
ums0 at uhidev0: 3 buttons and Z dir.
wsmouse0 at ums0 mux 0
wd3 at atabus4 drive 0: <IBM-DTLA-307015>
wd3: drive supports 16-sector PIO transfers, LBA addressing
wd3: 14649 MB, 29765 cyl, 16 head, 63 sec, 512 bytes/sect x 30003120 sectors
wd3: 32-bit data port
wd3: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd3(pdcide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)
wd4 at atabus5 drive 0: <QUANTUM FIREBALLlct10 10>
wd4: drive supports 16-sector PIO transfers, LBA addressing
wd4: 9787 MB, 19885 cyl, 16 head, 63 sec, 512 bytes/sect x 20044080 sectors
wd4: 32-bit data port
wd4: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
wd4(pdcide0:1:0): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using DMA)
wd0 at atabus0 drive 0: <WDC WD800JD-60JRA0>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd0(viaide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)
wd1 at atabus1 drive 0: <WDC WD800JD-22JNA0>
wd1: drive supports 16-sector PIO transfers, LBA addressing
wd1: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd1(viaide0:1:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
wd2 at atabus2 drive 0: <WDC WD1200JB-75CRA0>
wd2: drive supports 16-sector PIO transfers, LBA addressing
wd2: 111 GB, 232514 cyl, 16 head, 63 sec, 512 bytes/sect x 234375000 sectors
wd2: 32-bit data port
wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd2(viaide1:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)
atapibus0 at atabus3: 2 targets
cd0 at atapibus0 drive 0: <SONY    CD-RW  CRX230ED, , 4YS1> cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
cd1 at atapibus0 drive 1: <Pioneer DVD-ROM ATAPIModel DVD-104S 012, , E1.25> cdrom removable
cd1: 32-bit data port
cd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
cd0(viaide1:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
cd1(viaide1:1:1): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
boot device: wd0
root on wd0a dumps on wd0b
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)

TIA,

-Sean