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Crashing when using smbd a lot



I've got some weird and very annoying behavior with a 2.8 OpenBSD pentium 233mmx, ide drive (see dmesg below for description). The box freezes when I do large network transfers via smbd, for example, when I transfer cd images (~700mb) back and forth using a 100mbps switched network or when I uncompress a large file on the network drive (staroffice per example). It's very random and almost certain it will crash each time I transfer over 300-400 mb over the network. Before I switched it to 100mbps 2 days ago, it was at 10mpbs, and already doing the crash btw.

I first checked if the temperature was too high: no, it's cool, and the power supply is a 250W it should be powerful enough to handle the 7200rpm hard drive scratching at max. I after that recompiled the kernel adding NMBCLUSTERS=8192 (it was at 1024 before) just to see... didn't fixed a thing. I use the kernel from the stable 2.8 dist having just removed the #ifdefs in pciide.c to put my drive at DMA (cuz I need it when I uncompress large chunks), I don't have the buggy version of the Acer M5229 ide chipset I am pretty sure so I ca enable DMA no prob, seems to run very fine for everything... I would suspect something else doing this violent freeze of the machine.

About the freeze, it just freezes right there, nothing in the logs, just plain paralysis of everything, almost, cause I can type some characters on the console and they will appear on the screen but it will go worse and worse until everything is really really frozen... it's like a violent DoS hehe... but hey, I don't want this box to freeze, it's my main server!! Anybody has a clue ?

Here is the dmesg:
-------------------------------------------------------------------------
OpenBSD 2.8 (DESCENSION) #0: Fri Mar 23 13:20:48 GMT 2001
root_(_at_)_Descension:/usr/src/sys/arch/i386/compile/DESCENSION
cpu0: F00F bug workaround installed
cpu0: Intel Pentium/MMX ("GenuineIntel" 586-class) 234 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,MMX
real mem = 66629632 (65068K)
avail mem = 58675200 (57300K)
using 838 buffers containing 3432448 bytes (3352K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(00) BIOS, date 09/23/99, BIOS32 rev. 0 @ 0xfdb20
pcibios0 at bios0: rev. 2.1 found at 0xf0000[0x10000]
pcibios0: PCI IRQ Routing Table rev. 1.0 found at 0xf7a40, size 112 bytes (5 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("Acer Labs M1543 PCI-ISA" rev 0x00)
pci_intr_fixup: no compatible PCI ICU found: ICU vendor 0x10b9 product 0x1533
pcibios0: Warning, unable to fix up PCI interrupt routing
pcibios0: PCI bus #1 is the last bus
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Acer Labs M1543 Host-PCI" rev 0x04
ppb0 at pci0 dev 1 function 0 "Acer Labs M5243 AGP/PCI-PCI" rev 0x04
pci1 at ppb0 bus 1
"Acer Labs M5237 USB" rev 0x03 at pci0 dev 2 function 0 not configured
pcib0 at pci0 dev 7 function 0 "Acer Labs M1543 PCI-ISA" rev 0xc3
"S3 Trio32/64" rev 0x54 at pci0 dev 8 function 0 not configured
ne1 at pci0 dev 9 function 0 "Realtek 8029" rev 0x00: irq 9
ne1: address 00:20:18:56:e5:ff
xl0 at pci0 dev 10 function 0 "3Com 3c905C 100Base-TX" rev 0x74: irq 5 address 00:01:02:28:81:8a
exphy0 at xl0 phy 24: Broadcom 3C905C internal PHY, rev. 6
pciide0 at pci0 dev 15 function 0 "Acer Labs M5229 UDMA IDE" rev 0xc2: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <WDC WD153BA>
wd0: can use 32-bit, PIO mode 4, DMA mode 2, Ultra-DMA mode 4
wd0: 16-sector PIO, LBA, 14669MB, 16383 cyl, 16 head, 63 sec, 30043440 sectors
pciide0: channel 0 interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4 (using DMA data transfers)
atapiscsi0 at pciide0 channel 1
scsibus at atapiscsi0 not configured
pciide0: channel 1 interrupting at irq 15
atapiscsi0(pciide0:1:1): using PIO mode 4, DMA mode 2 (using DMA data transfers)
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
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
vt0 at isa0 port 0x60/16 irq 1: vga 80 col, color, 8 scr, mf2-kbd
pms0 at vt0 irq 12
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask c040 netmask c260 ttymask d2e2
pctr: 586-class performance counters and user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
WARNING: / was not properly unmounted
WARNING: NVRAM century is 19 but RTC year is 2001
-------------------------------------------------------------------------


Here is my smb.conf file:
-------------------------------------------------------------------------
[global]
	workgroup = MAIN
	netbios name = FIREGATE
	security = SHARE
	preferred master = True
	domain master = True
	socket address = 10.0.0.3
	guest account = smbuser
	hosts allow = 10.0.0.100 10.0.0.2 127.0.0.1

[public]
	path = /wd0j
	guest ok = Yes
	public = Yes
	browseable = Yes
	writable = Yes
	write list = smbuser




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