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37785
October 6th, 2010 10:00
MD3000i Virtual Disk not on preferred path
Hi all,
I have two PE R710 ESXi 4.0 hosts connecting to an MD3000i. It has two arrays - one with a total capacity of 817 GB using SAS drives, and one array with 2 TB using SATA drives. Each array is using a different controller and is configured as the owner/preferred path respectively. We're using VMWare Essentials, which gives us a little less management capability. vSphere indicates that everything is healthy and running fine; however, when I open the Dell Modular Disk Storage Manager, I notice every 10-15 minutes or so the Storage Array indicator blinks red indicating that it failed over to a non-preferred path. As soon as it fails, it almost immediately switches back to the optimal/preferred path.
I'm not quite sure if this is something I should worry about because we haven't had any problems with any of our virtual servers. This has been a sporadic issue for the past 3-4 months.
Below is a sample of the error logs I've been receiving in chronological order.
Date/Time: 10/6/10 10:42:22 AM
Sequence number: 1769975
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 f7 01 1b 00 00 00 00 00
11 40 18 01 de 98 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
Date/Time: 10/6/10 10:37:22 AM
Sequence number: 1769959
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 e7 01 1b 00 00 00 00 00
11 40 18 01 b2 97 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
Date/Time: 10/6/10 10:32:22 AM
Sequence number: 1769942
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 d6 01 1b 00 00 00 00 00
11 40 18 01 86 96 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
Date/Time: 10/6/10 10:22:48 AM
Sequence number: 1769920
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 1
Logged by: RAID Controller Module in slot 1
Raw data:
4d 45 4c 48 03 00 00 00 c0 01 1b 00 00 00 00 00
11 40 18 01 48 94 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 01 00 00 00 80 8c 8f 03 90 0b 32 00
b0 12 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
b0 12 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 90 8b 8f 03 cc 2e 05 00
01 00 00 00 00 00 01 00 00 00 00 00
Date/Time: 10/6/10 10:02:23 AM
Sequence number: 1769822
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 5e 01 1b 00 00 00 00 00
11 40 18 01 7f 8f ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
Date/Time: 10/6/10 9:42:22 AM
Sequence number: 1769731
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 03 01 1b 00 00 00 00 00
11 40 18 01 ce 8a ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
Date/Time: 10/6/10 9:27:48 AM
Sequence number: 1769689
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 1
Logged by: RAID Controller Module in slot 1
Raw data:
4d 45 4c 48 03 00 00 00 d9 00 1b 00 00 00 00 00
11 40 18 01 64 87 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 01 00 00 00 80 8c 8f 03 90 0b 32 00
b0 12 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
b0 12 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 90 8b 8f 03 cc 2e 05 00
01 00 00 00 00 00 01 00 00 00 00 00
Date/Time: 10/6/10 9:27:22 AM
Sequence number: 1769680
Event type: 4011
Event category: Error
Priority: Critical
Description: Virtual Disk not on preferred path due to AVT/RDAC failover
Event specific codes: 0/0/0
Component type: RAID Controller Module
Component location: RAID Controller Module in slot 0
Logged by: RAID Controller Module in slot 0
Raw data:
4d 45 4c 48 03 00 00 00 d0 00 1b 00 00 00 00 00
11 40 18 01 4a 87 ac 4c 00 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 08 00 00 00 08 00 00 00
ff ff ff ff 00 00 00 00 4c 10 8f 03 90 0b 32 00
7c 14 02 0c 30 00 00 00 b0 bc 34 00 00 00 00 00
7c 14 02 0c 08 5f 35 00 bc 27 1c 00 ee ee ee ee
ee ee ee ee 00 00 00 00 5c 0f 8f 03 cc 2e 05 00
01 00 00 00 00 00 00 00 00 00 00 00
If anyone has any insight as to what may be going on, I would appreciate it. As this is a mission critical server, I really don't want to have to replace the controllers.
Thanks!
JOHNADCO
2 Intern
•
847 Posts
0
October 6th, 2010 11:00
Dang where start?
So many things can cause this. Dell highly suggests 4.0 U2 or above. As ESXZ has had issues with this.
Most of the time it is a network configuration error. As in the VM / Host cannot communicate on the correct path / controller.
Are all you correct paths showing up on the iSCSI storagae adapter tab? Do all your net works show as up on the networking tab?
Both of those are under configuration in the VI Client.
JOHNADCO
2 Intern
•
847 Posts
0
October 6th, 2010 11:00
PS: As of the last FW update we have found if a given controller gets close to saturation it can happen as well. Are you making any VD's? Are you ding and VDC's?
mrokkam
154 Posts
0
October 7th, 2010 13:00
Do you have iscsi sessions to both the controllers from each host system?
-Mohan