1 thread writing for 20 secs to file d:\testfile.dat
using 4KB random IOs
enabling multiple I/Os per thread with 64 outstanding
buffering set to use hardware disk cache (but not file cache)
size of file d:\testfile.dat needs to be: 41943040000 bytes
current file size: 4194304000 bytes
need to expand by: 37748736000 bytes
expanding d:\testfile.dat ... done.
using specified size: 40000 MB for file: d:\testfile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 147.68
MBs/sec: 0.57
latency metrics:
Min_Latency(ms): 5
Avg_Latency(ms): 369
Max_Latency(ms): 7260
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100

this was a 40GB File from our exchange 2003 on citrix xen.
what a performance do you aspect?

regards
roger