Logical Disk Manager - big issue under load

[Guest Florian Heigl]

Hi,

 

 

while doing a test robocopy job from our old to the new fileserver i

noticed that diskpart started being extremely unreliable.

Normally there should be 14 or 15 Volumes to be listed; about 10 of

these are mounted into various directories that are in the robocopy

target area. When trying to list volumes diskpart will at times report

none, at times one or two of them and error out.

 

Similar behaviour shows in Disk Manager, it shows all volumes but some

lack the NTFS-label.

 

Also not all volumes are selectable in the snapshot property tab

(which makes things really bad)

 

I have to admit it's been a long time since I used the mount-into-a-

directory option, i think last time was in 2001.

---

 

 

H:\>net start "Logical Disk Manager"

The requested service has already been started.

 

More help is available by typing NET HELPMSG 2182.

 

 

H:\>diskpart

 

Microsoft DiskPart version 5.2.3790.3959

Copyright © 1999-2001 Microsoft Corporation.

On computer: TSSRV02-NEU

 

DISKPART> list volume

 

Volume ### Ltr Label Fs Type Size Status

Info

---------- --- ----------- ----- ---------- ------- ---------

--------

 

The disk management services could not complete the operation.

 

DISKPART> exit

 

Leaving DiskPart...

 

 

Also i found the following errors from VSS

Event Type: Warning

Event Source: VSS

Event Category: None

Event ID: 12290

Date: 12/3/2007

Time: 4:51:05 AM

User: N/A

Computer: TSSRV02-NEU

Description:

Volume Shadow Copy Service warning: GetVolumeInformationW(\\?

\Volume{29ef1005-42a7-45e0-adb3-f422f1eabe6d}\,NULL,0,NULL,NULL,

[0x00000000], , 260) == 0x00000005. hr = 0x00000000.

 

At the end of the day these all point back to some inability for

querying the Logical Disk Manager, which showed no errors in event log

over hours but 5 minutes ago finally logged the following:

 

Event Type: Information

Event Source: Removable Storage Service

Event Category: None

Event ID: 83

Date: 12/3/2007

Time: 5:26:31 AM

User: N/A

Computer: TSSRV02-NEU

Description:

RSM is rebuilding its database file(s).

 

Event Type: Warning

Event Source: Removable Storage Service

Event Category: None

Event ID: 93

Date: 12/3/2007

Time: 5:26:31 AM

User: N/A

Computer: TSSRV02-NEU

Description:

Neither copy of the RSM database is consistent: Reconstructing using

the main datafile.

 

After that it said the recontruct had been successful, but the list

issue persists.

 

To make things weirder, the robocopy runs like a charm.

 

I wonder if this is known behaviour or if i should open a support

call. I had hoped to give our new fileserver a more flexible layout

but that seems not a good option if that is unstable ;)

 

Any pointers (apart following into the RSM error which i honestly

consider more a sympton than a cause)

[Guest Florian Heigl]

Re: Logical Disk Manager - big issue under load

 

sorry about the lack of basic information.

W2k3 Enterprise + SP2 + the current hotfixes windows update picked.

System is a Dell Poweredge 2950 / Perc5i Raid

 

CPU Load on all cores is low, i/o throughput is low too, just very

high IO/s from robocopy /create run.

 

Regards,

Florian