[Samba] Lock ups?

[Chris]

Hi there. I'm reasonably new to Samba but quite experainced with Linux.

The other day I decided to throw a file server together for my house. I
put together a Linux box with 5 120 gig drives raid 5'd in a rack mount
box and put it in the basement.

It's running debian and Samba 3.0.2a-1. The Kernel is 2.4.26.

I am then mounting the drive as a mapped network drive under a windows XP
box that is my main PC.

Initially all seemed good. I filled the raid and started using the PC. I
am however getting what appear to be "lock ups" regularly when browsing
the samba share I have created. I'll be browsing happy as larry with music
also streaming off the share when my explorer window will lock up and the
music will stop playing. Any attempt to open "My Computer" or any explorer
window to access the share results in nothing. If I wait 10 seconds to 1
min it suddenly comes right and everything pootles along again as normal.

If I just stream 1 file off the server then it's fine for (the longest
I've tried) up to 2 hours. But if I start browsing the shares or opening
other shared files I get lock ups within 1-5 min. It's very frustrating
when I'm trying to do multiple things at once.

I ran ethereal on the windows end and when the pauses happen I see SMB
messages flying round but they seem to be requests for the same bit over
and over.. Usually as the pause ends I see a close request going from the
XP box to the Linux server. I can provide ethereal captures if that would
help.

I am also SSHed into the server and it's not a drive pause as the drive
and mounted dir are totally responsive under linux while the pause is in
effect.

I don't think it's network related as I have 100 meg full duplex locked
all the way through. Both PC's are plugged into a Cisco 2950 and I see no
itteruption of traffic between the two when a pause occurs.

Below is my SMB conf.... any suggestions? My GF is going to kill me if her
photo editing keeps locking up like this. :)

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[global]
server string = %h server (Samba %v)
netbios name = atari
wins support = yes
dns proxy = no
log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0
panic action = /usr/share/samba/panic-action %d
encrypt passwords = true
passdb backend = tdbsam guest
obey pam restrictions = yes
passwd program = /usr/bin/passwd %u
socket options =  TCP_NODELAY,  IPTOS_LOWDELAY, SO_KEEPALIVE, SO_SNDBUF=8192, SO_RCVBUF=8192, SO_RCVBUF, SO_SNDBUF
[shared]
   comment = Storage
   writable = yes
   locking = yes
   oplocks = True
   create mask = 0700
   directory mask = 0700
   path = /raid-1/shared
   public = yes

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