Jul 30 00:03:26 nau-esx2 vmkernel: 0:08:21:10.231 cpu11:1472)<6>Debug scsi underrun
Jul 30 01:48:33 nau-esx2 vmkernel: 0:10:06:18.113 cpu5:1620)Net: 4211: unicastAddr 00:50:56:ad:44:27;
Jul 30 01:48:33 nau-esx2 last message repeated 5 times
Jul 30 01:48:34 nau-esx2 vmkernel: 0:10:06:19.023 cpu5:1619)Net: 4211: unicastAddr 00:50:56:ad:44:27;
Jul 30 01:48:34 nau-esx2 vmkernel: 0:10:06:19.041 cpu5:1619)Net: 4211: unicastAddr 00:50:56:ad:44:27;
Jul 30 01:48:41 nau-esx2 vmkernel: 0:10:06:25.871 cpu6:1619)Net: 4211: unicastAddr 00:50:56:ad:44:27;
Jul 30 01:48:46 nau-esx2 vmkernel: 0:10:06:30.778 cpu12:1586)Net: 4211: unicastAddr 00:50:56:ad:43:36;
Jul 30 01:48:46 nau-esx2 last message repeated 5 times
Jul 30 01:48:46 nau-esx2 vmkernel: 0:10:06:30.857 cpu7:1610)Net: 4211: unicastAddr 00:50:56:ad:13:1a;
Jul 30 01:48:46 nau-esx2 last message repeated 5 times
Jul 30 01:48:47 nau-esx2 vmkernel: 0:10:06:31.651 cpu13:1583)Net: 4211: unicastAddr 00:50:56:ad:43:36;
Jul 30 01:48:47 nau-esx2 vmkernel: 0:10:06:31.677 cpu13:1583)Net: 4211: unicastAddr 00:50:56:ad:43:36;
Jul 30 01:48:47 nau-esx2 vmkernel: 0:10:06:31.774 cpu7:1609)Net: 4211: unicastAddr 00:50:56:ad:13:1a;
Jul 30 01:48:47 nau-esx2 vmkernel: 0:10:06:31.795 cpu6:1609)Net: 4211: unicastAddr 00:50:56:ad:13:1a;
Jul 30 01:48:50 nau-esx2 vmkernel: 0:10:06:34.346 cpu3:1196)<6>Debug scsi underrun
Jul 30 01:48:58 nau-esx2 vmkernel: 0:10:06:42.316 cpu14:1586)Net: 4211: unicastAddr 00:50:56:ad:43:36;
Jul 30 01:48:59 nau-esx2 vmkernel: 0:10:06:43.813 cpu5:1610)Net: 4211: unicastAddr 00:50:56:ad:13:1a;
Jul 30 04:43:47 nau-esx2 vmkernel: 0:13:01:31.333 cpu2:1281)<6>Debug scsi underrun
Jul 30 07:53:48 nau-esx2 vmkernel: 0:16:11:32.420 cpu14:1304)<6>Debug scsi underrun
Jul 30 08:23:08 nau-esx2 vmkernel: 0:16:40:52.361 cpu12:1155)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.364 cpu14:1155)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.835 cpu15:1155)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 last message repeated 5 times
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.874 cpu13:1154)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.879 cpu13:1154)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.879 cpu13:1154)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.881 cpu13:1154)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:23:09 nau-esx2 vmkernel: 0:16:40:53.896 cpu13:1154)Net: 4211: unicastAddr 00:50:56:ad:70:cc;
Jul 30 08:24:56 nau-esx2 vmkernel: 0:16:42:40.736 cpu15:1516)VSCSI: 2803: Reset request on handle 8452 (0 outstanding commands)
Jul 30 08:24:56 nau-esx2 vmkernel: 0:16:42:40.736 cpu11:1069)VSCSI: 3019: Resetting handle 8452
0/0
Jul 30 08:24:56 nau-esx2 vmkernel: 0:16:42:40.736 cpu11:1069)VSCSI: 2871: Completing reset on handle 8452 (0 outstanding commands)
Jul 30 08:34:23 nau-esx2 vmkernel: 0:16:52:07.988 cpu1:1516)VSCSI: 2803: Reset request on handle 8452 (0 outstanding commands)
Jul 30 08:34:23 nau-esx2 vmkernel: 0:16:52:07.988 cpu11:1069)VSCSI: 3019: Resetting handle 8452
0/0
Jul 30 08:34:23 nau-esx2 vmkernel: 0:16:52:07.988 cpu11:1069)VSCSI: 2871: Completing reset on handle 8452 (0 outstanding commands)
Jul 30 09:18:23 nau-esx2 vmkernel: 0:17:36:07.520 cpu7:1281)<6>Debug scsi underrun
This is on 4Gb FCP with Qlogic HBA's. Also has those scsi underruns listed. I recently upped the queue depth to 64 on the 3x esx hosts and 1x exchange server which is also using luns from the same SAN. There is no way there is 32k files on any of the vmfs luns. I have it split out into os/data/swap datastores/luns. 3x os luns 400GB each, 2x data luns 400GB each, 2x swap luns 150GB each. This works out to be c/d/e in the OS to keep our netapp snapshot size reduced by separating those different kinds of data into their own volumes(containing the luns). There is up to 20~ vm's on some of the luns(not sure if this is a big deal).