[mdlug] ESX3 IO Problems

[Morris, Tim]

Are there any ESX gurus out there?
 
I have a bad I/O problem with our ESX 3.0.2 build 52542 server that I
thought I would ask about. The same problem occurs when using
3.0.1-32029 (unpatched).
 
Host Computer: 
Dell Poweredge 2850 BIOS A06
2x 3.0 GHz Xeon Procs (HT disabled)
4GB RAM
Dual Intel 8254NXX Gigabit Ethernet onboard
PERC 4E/Di
2x 146GB SCSI3 (Maxtor) drives internal (RAID 1) 
1 LD = ~139GB
PERC 4E/Dc
Powervault 220VS w/ 10x 146GB SCSI3 (Maxtor) drives (RAID 5 w/ 2
hotspares) 
1LD = 979MB
All components have been updated to the latest availble firmware from
Dell (even all 12 drives!)
 
My problem is any type of file operation seems to hang every 50-200MB.
cp, ftp, scp, everything.
You can see it with an ftp hash especially. It hangs for a second, then
takes off again. 
 
I have put together some transfer stats for you to look at (attached).
 
Any suggestions on where to go from here? 
Any Performance testing/diagnostic utils/tips?
Any more info needed?
Anyone run into this before? 
 
I could really use some help on this...  Any suggestions would be
helpful.
 
--------------------------------------------------
Tim Morris
Systems Engineer
Siemens Automation and Drives
UGS PLM Software
 
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