SYstem Backup Throws Warning disk Messages For DPool Drive

[Sanders]

I have a fairly new server running WSE2012R2. I have DrivePool 2.x latest version installed. One pool configured (F:) and it is made up of 4-4TB and 1-6TB HGST NAS drives all on my mobo's Intel controller. Boot device is a 256G SSD also on Intel and there is one other 1TB drive dedicated to system backups on a secondary Marvell onboard chip controller. No other disks although I do have a slim DVD installed on a add-on controller (Siig) 2-port SATAIII card.

My system backups are configured to do daily backups of the C: (SSD) drive so I could recover with a bare metal recovery. In no way are any of the pool drives or the pool itself involved in nightly system backups. They do hold some of the relocated system folders (Client Backups mainly) but those are not backed up in the dailys. The backups are configured to run at 11:30pm and are set to be Microsoft's version of "incremental". However about every 2 weeks the backup routine actually does a full back up on the system partition and then does incrementals from that point on until it decides the next full backup is needed. Whenever that full backup happens, I always get several nondescript disk warning errors that I have traced back to the DrivePool drive. (F:). The errors (typically between 2-8 identical warnings) all occur at exactly the same time stamp in the Windows Logs right at the completion time of the backup. I assume it's basically finishing writing the ~24 gig backup files at that point and also creating the new volume for the backup set and/or clearing out old ones, which is what, I suspect, triggers the errors as the DrivePool service gets notified of a bunch of disk/volume changes.

Anyway the error is:
Level: Warning
Source: disk
Event ID: 51
Task Category: None
Message: An error was detected on device \Device\Harddisk8\DR19 during a paging operation.

Always 'Harddisk8' which maps to the DrivePool drive. The DR19 part does vary.

When I look at the DrivePool logs I see these types of messages (Windows Logs has the 8 warnings at exactly time stamp 06:37:34Z):
DrivePool.Service.exe    Information    0    [Disks] Updating disks / volumes...    2015-04-08 06:37:32Z    721806531075
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeMissingDisk (key=PoolPartUpdate)    2015-04-08 06:37:34Z    721812554682
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:34Z    721812556450
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeReadOnly (key=PoolPartUpdate)    2015-04-08 06:37:34Z    721812557941
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:34Z    721812558843
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeNoMeasure (key=PoolPartUpdate)    2015-04-08 06:37:34Z    721812560300
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:34Z    721812561161
DrivePool.Service.exe    Information    0    [Disks] Got Volume_Depart (volume ID: a440ea48-264c-4018-a7f6-c8bad40ea5db, plex ID: 00000000-0000-0000-0000-000000000000, %: 0)...    2015-04-08 06:37:34Z    721812637894
DrivePool.Service.exe    Information    0    [Disks] Got Disk_Depart (disk ID: 21bec784-9493-4ef2-91ca-d1cb1b4f8564)...    2015-04-08 06:37:34Z    721812660975
DrivePool.Service.exe    Information    0    [Disks] Got Pack_Depart (pack ID: c5d4e5d9-a1e6-4348-b50b-8b9492eaaa1b)...    2015-04-08 06:37:34Z    721812663010
DrivePool.Service.exe    Information    0    [Disks] Updating disks / volumes...    2015-04-08 06:37:35Z    721815932045
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeMissingDisk (key=PoolPartUpdate)    2015-04-08 06:37:36Z    721817871986
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:36Z    721817873395
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeReadOnly (key=PoolPartUpdate)    2015-04-08 06:37:36Z    721817874499
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:36Z    721817875371
DrivePool.Service.exe    Information    0    [FsControl] Clear pool mode: PoolModeNoMeasure (key=PoolPartUpdate)    2015-04-08 06:37:36Z    721817897265
DrivePool.Service.exe    Information    0    [FsControl] Set overall pool mode: PoolModeNormal    2015-04-08 06:37:36Z    721817900386

The Event ID 51 disk error appears to be some generic MS warning message which is impossible to diagnose. The question is, is it something I should be concerned about and/or is it normal? It's entirely repeatable at every full backup but it's been happening for a few months now with no obvious bad effects.

I can upload the entire DP log from 4/7/2015 if needed. It did a full backup last night.

 

Thanks.
 

 

[Christopher (Drashna)]

Well, the logs that you posted don't indicate any sort of issue. Just normal stuff.

 

If you want, please do upload the entire log. and do so here: https://stablebit.com/Contact (as there may be "sensitive" files names listed, and the contact form is private).

 

 

If possible, could you enable file system logging for the next full back? If you know when it's going to happen.

http://wiki.covecube.com/StableBit_DrivePool_2.x_Log_Collection

 

 

Otherwise, the issue is likely that the full backup is kicking off a VSS snapshot of ALL of the disks in question. This obviously fails on the pool drive, and produces the above error.