I am running VMWare ESXi 3.5 on a server with Raid 5 7200 SATA drives (I know, SAS/SCSI is faster).
When I try to copy a 4GB test file to one of my VM's (tried to multiple VM's on both XP and Server 2003) it moves along quickly until 1/2 way where it stalls. The disk graph for the VM still shows high disk activity for a few more minutes and then eventually tapers down.
I have been playing with adding different counters and noticed that even when the disk usage (average) drops the "physical disk write latency" stays high, much higher then when i first started the copy.
Then after 5-10 minutes where it appears that the file has stalled it will resume and finish the file transfer.
Any thoughts on how i can further troubleshoot the bottleneck on my server?