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shared drive

Created: 08 Oct 2012 • Updated: 10 Oct 2012 | 24 comments
This issue has been solved. See solution.

Hi ALL,

We are configuring a new backup environment on LINUX NBU 7.1.

We have 2 libraries and each have 10 drives in it.

I have 6 media servers and 1 master in cluster.

Now i want to have these 10 drives on each libray to be shared by y all media servers.

Can anybody please provide me the steps?

Comments 24 CommentsJump to latest comment

Marianne's picture

Read through section 4 of NetBackup Shared Storage Guide  http://www.symantec.com/docs/DOC3659

In short:
Zone all drives to all media servers.
Only necessary to zone robots to one media server (can be master server).
Add Library Based Tape Drive and Shared Storage Option License on all media servers.
Check on master server that all media servers are 'Active for Disk and Tape' with 'nbemmcmd -listhosts -verbose' command.
Run Device Config Wizard - select Robot Control Host as well as all media servers.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture

How to make a SCAN host for my all shared drives?

Marianne's picture

The first media server that is started will automatically become the SCAN host.

See 'About scan hosts' in SSO manual (link in my previous post).

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture

For all the drives?IS it recommended that only one scan host for all my 20 drives?

Marianne's picture

Have you read section 4 of the manual yet?

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture

Yess.But i have nt find my answer.How will i assign all my drives a SCAN host?

mph999's picture

You don't, NBU will sort it out.

The only adjustment sometimes suggested when there are many media servers, and I will admit to not knowing what this number is, but I suspect it is more than 6, is to set the 'scan ability' value of one server to 9, and the others to 5.

Persoanlly, I would leave it at defaults unless there is an issue.

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Marianne's picture

I was hoping that this section in the manual would answer your question:

How the scan host is determined:
EMM determines scan hosts; a scan host may be different
for each shared drive. The first host in the environment to
come online with a non-zero scan ability factor is the initial
scan host for its drives.
To configure the scan ability factor of media servers, use
the nbemmcmd command. For more information, see
NetBackup Commands Reference Guide.
 
The scan host can change:
.....
....
 
The default 'scanability' for all media servers is 5.  I agree with Martin - leave NBU to manage this, unless you experience problems. 
We have customers with more than 20 shared drives. Never had to 'fiddle' with scanability and manually trying to select Scan Host.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture
  1. From where i need to  run the Device Wizard?Master or media server?
  2. ,Do i get the option of making master server as Robot control host?
  3. When My first backup runs from media server A and it goes to drive B.So Drive B will be assigned a scan host A.When this drive is used by media server B ,then what will be the scan host?
Marianne's picture

1. Master

2. Best to first select Master only. This will ensure that Master is Robot Control host.
Run Device Config Wizard again, this time selecting Master and all Media servers.

3. SCAN host has nothing to do with 'Reserved' host (host using tape drive). Please read section 'About Scan Hosts' again.
If it still does make sense, wait till all is configured. Run 'vmdareq' command (in volmg/bin) on master server when no backups are running and when backups are running. All will be clear when you see the output.

Example of vmdareq output:

Drive1 - RESERVED on Sun <date>
     media1 RESERVED SCAN_HOST UP 
     media2 UP 
     media3 UP 
Drive2 - RESERVED on Sun <date>
     media1 SCAN_HOST UP 
     media2 UP 
     media3 RESERVED UP 
Drive3 - RESERVED on <date>
     media1 SCAN_HOST UP 
     media2 UP 
     media3 RESERVED UP 
Drive4 - RESERVED on <date>
     media1  SCAN_HOST UP 
     media2 RESERVED UP 
     media3 UP 
Drive5 - AVAILABLE
     media1 SCAN_HOST UP 
     media2 UP 
     media3 UP 
 

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture
Drive5 - AVAILABLE
     media1 SCAN_HOST UP 
     media2 UP 
     media3 UP 
 
In above case which media server will be used as SCAN host?
mph999's picture

Why are you so concerned about the scan host - leave NBU to it, it will work fine.

It's all exaplined in the SSO guide.

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Andy2345's picture

@Martin.Thanks.

One more doubt:

When i run the device wizard, where do i have the option to select my robot control host..If some screenshot can be provided.That may be useful

mph999's picture

On the screen in the gui where you select the hosts to scan, select your media server(s) and just make sure you select the robot control host as well.

M

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Andy2345's picture

When i run the DCW,i can see my one master server and 6 media servers.

Now what to do next to make my master server as Robot control host

Marianne's picture

Now what to do next to make my master server as Robot control host

I have answered this question yesterday:

2. Best to first select Master only. This will ensure that Master is Robot Control host.
Run Device Config Wizard again, this time selecting Master and all Media servers

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

Andy2345's picture

so you mean to say that I should only check master server name first and run the wizard?next next next

Marianne's picture

Correct.

If all media servers can see the robot, there is is no way to choose Robot Control host. No way to tell which media server will be chosen as robot control host.

This is how I configure in a shared environment:
Start device config wizard and select the server that you want to be the robot control host (no other media server(s)). Configure this server only and allow the wizard to restart services/daemons.
Next, start wizard again, this time selecting robot control host as well as all media servers to config shared drives.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

SOLUTION
Andy2345's picture

Thanks Marianne.

If i want one of my media server to be robot control host then?

Marianne's picture

Then you first select the media server only. Finish config and restart services/daemons - same as previous post where master server was selected.
Next, select robot control host and all other servers sharing the tape drives.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

mph999's picture

If only one server can see the robot, then this will be the robot control host when the servers are scanned.  Perhaps Marianne knows something I don't (quite possible ...)  - I can only think scanning the RCH separately is required if multiple servers can see the robot.  However, as Marianne pointed out above, only one server should be allowed to see the robot at any one time.

If you want a media server to be the RCH, just configure the san so that only that media server sees the robot.

It makes the most sense for the master to be the RCH, as the master has to be available, then the RCH will always be available, if a media server is the RCH and goes down, the remaing media severs cannot function.

Martin

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805
 
Andy2345's picture

Start device config wizard and select the server that you want to be the robot control host (no other media server(s)). Configure this server only and allow the wizard to restart services/daemons.

If with my master server 2 drives are attached yhen this will also be configured?Correct?

And 2nd time when i run the wizard and check master server?Will anything happen?

mph999's picture

Yes the drives will be configured also, unless you delect them.

2nd time, it will just reconfigure them.

When don't you just try it and see ...

Regards,  Martin
 
Setting Logs in NetBackup:
http://www.symantec.com/docs/TECH75805