It´s sounds like permissions problems, what is the listed nsr\applogs\xbsa.messages ?

Is your client really called bg3sqlclus1w.gdnindia.com? When you do client initiated SQL backup does that work?

Hum.., I need to change my glasses
You need to configure the 2 physical clients of the cluster as a client of NetWorker Server.

bg3sqlclus1w.gdnindia.com and bg3sqlclus2w.gdnindia.com are client resources for nodes

From backup server

* BMSDBCLUS:MSSQL:
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 Backing up Northwind...
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 BACKUP database [Northwind] TO virtual_device='Lega
to#30133368-b1d4-4a12-88d6-afe5c42d3110' WITH name='LegatoNWMSQL'
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 Internal system error, please see nsr\applogs\xbsa.
messages on the client system for reason.
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 Microsoft SQL Server Provider error:
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 Write on 'Legato#d6adbf08-e3a1-4f5f-8f4c-b34bec4049
fb' failed, status = 995. See the SQL Server error log for more details..
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 BACKUP DATABASE is terminating abnormally..
* BMSDBCLUS:MSSQL: [1220] 05/11/07 08:54:28 Processing Northwind failed, the item will be skipp
ed.

When backup initiated from client

[2788] 05/11/07 08:58:06 Backing up Northwind...
[2788] 05/11/07 08:58:06 BACKUP database [Northwind] TO virtual_device='Leg
ato#020daf3f-c7cf-4dcd-bdfe-01ab1988953d' WITH name='LegatoNWMSQL'
[2788] 05/11/07 08:58:06 Internal system error, please see nsr\applogs\xbsa
.messages on the client system for reason.
[2788] 05/11/07 08:58:06 Microsoft SQL Server Provider error:
[2788] 05/11/07 08:58:06 Write on 'Legato#2ba3ab1e-7d3a-42be-aadd-f0a86feec
f85' failed, status = 995. See the SQL Server error log for more details..
[2788] 05/11/07 08:58:06 BACKUP DATABASE is terminating abnormally..
[2788] 05/11/07 08:58:06 Processing Northwind failed, the item will be skip

I have put following in remote access
cluster.sql@bg3sqlclus1w.gdnindia.com
cluster.sql@bg3sqlclus1w.gdnindia.com
*@BMSDBCLUS.gdnindia.com
*@FANDSCLUSTER.gdnindia.com

SQL server logs below error.
BackupMedium::ReportIoError: write failure on backup device 'Legato#020daf3f-c7cf-4dcd-bdfe-01ab1988953d'. Operating system error 995(The I/O operation has been aborted because of either a thread exit or an application request.).

Internal I/O request 0x3A549C80: Op: Write, pBuffer: 0x05590200, Size: 512, Position: 0, UMS: Internal: 0x3E7D5E56, InternalHigh: 0x20000000, Offset: 0x3FF18147, OffsetHigh: 0x20000000, m_buf: 0x00000043, m_len: 0, m_actualBytes: 0, m_errcode: 995, BackupFile: Legato#020daf3f-c7cf-4dcd-bdfe-01ab1988953d

BACKUP failed to complete the command BACKUP database [Northwind] TO virtual_device='Legato#020daf3f-c7cf-4dcd-bdfe-01ab1988953d' WITH name='LegatoNWMSQL'

Yes, but what nodes - physical or virtual ones? What has been said was to hint you needed physical hosts and virtual ones too. Are BMSDBCLUS.gdnindia.com and FANDSCLUSTER.gdnindia.com physical ones?

I also just realized you are using build 154 - before proceeding further to rule out some gothcas can apply latest build for SQL module v5? Is there anything in xbsa.messages? I would suggest to apply latest build, try again and then if it fails increase debug (do not use level 9 as that slows down whole thing, 3 or 5 should be more than enough), collect all data and logs and review it. If that doesn't give you any clue opet a case with support along with logs and configuration resources.

Btw, what arch is that SQL server on? ia64, x64 or EM64T? All 3 have different SQL module versions and you must make sure you use right one.

client `bg3sqlclus1w.gdnindia.com' is not properly configured on the NetWorker Server

This usually means this full domain name is not on the alias list of backup client.

FANDSCLUSTER and BMSDBCLUS are virtual hosts.

It finally worked after reinstalling (same build 154) and after adding all hostnames (physical and virtual) in servers file of physical nodes. Also added a *@* on remote field of all hosts I am unable to figure out where was the problem I had tried all these options before posting this thread.

Also I am unable to do MSSQL recovery it says BMSDBCLUS.gdnindia.com is not a client of bdc3bakup2w.

Do you have BMSDBCLUS.gdnindia.com on alias list of BMSDBCLUS client resource?

Yes

Yes..it is in alias.
Also directed recovery of SQL DB is happening from servers other than cluster nodes.

Could be something in a way how whole thing is set up - have support expect the configuration - must be something simple.