Windows 2003 R2 x64 intermittently hangs

[dadoolittle]

New Windows 2003 R2 x64 server, Quad core proc, 12gigs ram, dual HBA fiber
attached SAN storage. 3 SAN data volumes (2 - data volumes and 1 for user
folders, mapped to look like one share). Server will suddenly seem to stop
responding, sort of. Very slow browsing of the mapped drive. Server is
still responding, and RDP to it, and open both data drives, but cannot open
the use folder volume. No errors are generated. Very little to no disk
activity in perf mon.
There are no errors on the server, and no errors in the SAN storage system
(which is also brand new). We have a duplicated system (same server and SAN
system) as we were planning for an offsite DR and DFS sharing system, we
replicated the data to the other server/SAN, and the same problem occured.
Anybody got any ideas?????

[Erik Schorr]

We're running into a similar issue with Win2003 Server and an OpenFiler iscsi san as the backing store for one of the NTFS volumes. The volume is shared to about 40 workstations over gigabit ethernet.

The puzzling thing is, during the stall, the traffic to/from the SAN is only about 150-200 IOPS and accounts for at most 2MB/sec of throughput, and becomes mostly write operations. During this time, all access on the 2003 fileserver to that volume completely hangs for 5 to 15 minutes. Everything else on the fileserver is okay, and its CPU load stays low.

Post by dadoolittle
New Windows 2003 R2 x64 server, Quad core proc, 12gigs ram, dual HBA fiber
attached SAN storage. 3 SAN data volumes (2 - data volumes and 1 for user
folders, mapped to look like one share). Server will suddenly seem to stop
responding, sort of. Very slow browsing of the mapped drive. Server is
still responding, and RDP to it, and open both data drives, but cannot open
the use folder volume. No errors are generated. Very little to no disk
activity in perf mon.
There are no errors on the server, and no errors in the SAN storage system
(which is also brand new). We have a duplicated system (same server and SAN
system) as we were planning for an offsite DR and DFS sharing system, we
replicated the data to the other server/SAN, and the same problem occured.
Anybody got any ideas?????
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