Well, I got 12 hours this time. I didn't rerun the command you had requested since the last failure. But whatever the problem is its happening much more frequently than it has been. I was copying about 100GB of data off of the server at the time of the failure. Anyway, I did save the output of the vdf -h command to the datastore, so I have that output for you.
Is there any chance that this could be a bad NIC? I built this system 2 months ago and I installed ESXi without really testing the hardware. My gut feeling is that if I have too many network connections open then the house of cards comes crashing down. It seems to happen more frequently when I try to copy files or otherwise do things that opens a lot of network ports.
Anyway, here's the output of vdf -h about 2 minutes after my loss of network connectivity...
Tardisk Space Used
s.v00 347M 347M
ata_pata.v00 44K 42K
ata_pata.v01 32K 28K
ata_pata.v02 32K 30K
ata_pata.v03 32K 31K
ata_pata.v04 40K 36K
ata_pata.v05 36K 32K
ata_pata.v06 32K 29K
ata_pata.v07 40K 36K
block_cc.v00 84K 82K
ehci_ehc.v00 92K 90K
weaselin.t00 13M 13M
esx_dvfi.v00 368K 366K
xlibs.v00 1M 1M
ima_qla4.v00 1M 1M
ipmi_ipm.v00 44K 41K
ipmi_ipm.v01 112K 111K
ipmi_ipm.v02 104K 101K
misc_cni.v00 28K 25K
misc_dri.v00 3M 3M
net_be2n.v00 348K 346K
net_bnx2.v00 292K 290K
net_bnx2.v01 1M 1M
net_cnic.v00 124K 120K
net_e100.v00 300K 297K
net_e100.v01 248K 246K
net_enic.v00 148K 144K
net_forc.v00 132K 131K
net_igb.v00 244K 240K
net_ixgb.v00 376K 374K
net_nx_n.v00 2M 2M
net_r816.v00 140K 137K
net_r816.v01 84K 82K
net_s2io.v00 244K 242K
net_sky2.v00 116K 112K
net_tg3.v00 324K 321K
net_vmxn.v00 104K 102K
ohci_usb.v00 60K 56K
sata_ahc.v00 100K 99K
sata_ata.v00 60K 58K
sata_sat.v00 88K 86K
sata_sat.v01 44K 41K
sata_sat.v02 44K 43K
sata_sat.v03 44K 40K
sata_sat.v04 36K 32K
scsi_aac.v00 172K 171K
scsi_adp.v00 432K 428K
scsi_aic.v00 296K 295K
scsi_bnx.v00 200K 196K
scsi_fni.v00 160K 159K
scsi_hps.v00 192K 190K
scsi_ips.v00 132K 129K
scsi_lpf.v00 1M 1M
scsi_meg.v00 100K 96K
scsi_meg.v01 168K 165K
scsi_meg.v02 96K 92K
scsi_mpt.v00 392K 389K
scsi_mpt.v01 520K 517K
scsi_mpt.v02 440K 436K
scsi_qla.v00 1M 1M
scsi_qla.v01 288K 285K
scsi_rst.v00 748K 745K
uhci_usb.v00 60K 57K
xorg.v00 3M 3M
imgdb.tgz 252K 250K
state.tgz 20K 18K
-----
Ramdisk Size Used Available Use% Mounted on
root 32M 432K 31M 1% --
etc 28M 184K 27M 0% --
tmp 192M 4K 191M 0% --
hostdstats 249M 2M 246M 0% --
Thanks for the help so far.