Unable to copy the virtual machine disk using the VMware VixDisklib .

Article:TECH154848  |  Created: 2011-03-04  |  Updated: 2012-12-31  |  Article URL http://www.symantec.com/docs/TECH154848
Article Type
Technical Solution


Issue



Backup of a virtual machine using the Backup Exec Agent for VMware Virtual Infrastructure (AVVI) fails with the error "V-79-57344-38264 - Unable to copy the virtual machine disk using the VMware VixDiskLib.

 


Error




V-79-57344-38264- Unable to copy the virtual machine disk using the VMware VixDiskLib.

VixDiskLib_Read() reported the error: Unknown error

Beremote.log from the Backup Exec server shows.

[fsys\vmvcb]         - VM_VCBPROXY_FS::GetNextDiskChangeInfo() Node name: 'DiskChangeInfoResult' startoffset: (0x00000000)  startlength: (0x42949672960)
[fsys\vmvcb]         - VM_VCBPROXY_FS::GetFirstDiskChangeInfoExtent() Node name: 'ChangeArea' offset: (0x00000000)  length: (0x01048576)
[fsys\vmvcb]         - VM_VCBPROXY_FS::GetNextDiskChangeInfoExtent() Node name: 'ChangeArea' offset: (0x01048576)  length: (0x3313041920)
[fsys\shared]        - VDDK-Log: NfcNetTcpRead: timed out waiting for data
[fsys\shared]        - VDDK-Warn: [NFC ERROR] NfcFssrvrRecv: failed with code = 9
[fsys\shared]        - VDDK-Warn: [NFC ERROR] NfcFssrvr_DiskIo: failed to receive read data
[fsys\shared]        - VDDK-Log: DISKLIB-LIB   : RWv failed ioId: #3914 (290) (34) .
[fsys\vmvcb]         - VM_VCBPROXY_FS::ReadObj() Could not read the disk '[LUN] VM-NAME/VM-NAME.vmdk' start Sector: '500038', Num of sectors: '128' Error Text: 'Unknown error' Error: '1245540515841'
[ndmp\loops]         - LP_ENV::MsgError: error 0xe0009578 processing object VM-NAME/VM-NAME.vmdk
[fsys\shared]        - VDDK-Log: NfcNetTcpRead: timed out waiting for data
[fsys\shared]        - VDDK-Warn: [NFC ERROR] NfcFssrvrRecv: failed with code = 9
[fsys\shared]        - VDDK-Warn: [NFC ERROR] NfcFssrvr_Close: failed to receive reply to close message
[fsys\brfs]          - brUtil::GetSpecialObjectStream() - No special objects


Cause



This is a network related problem that results in an I/O error when an attempt to download a file from datastore is made.


Solution



To resolve the issue disable NetDMA (Network Direct Memory Access) feature on the Backup Exec server.

netsh int tcp set global netdma=disable

For more detailed information on NetDMA feature, refer Microsoft KB article http://support.microsoft.com/kb/95103

 

Note: To enable or disable the debug logging in Backup Exec, refer the technote in related articles selection below.


Supplemental Materials

SourceError Code
Value0xe0009578
Description

Unable to copy the virtual machine disk using the VMware VixDiskLib
Final error category: Resource errors




Article URL http://www.symantec.com/docs/TECH154848


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