Four drives can not working concurenlty

[XiaomingFan369]

We have four drivers and two libraries, each library have two drivers. However, four drivers can't work concurrently. Only two of them can run job concurrently.

I try to change Max Concurrent Drivers from 2 to 4 in Storage Unit, but the NetBackup not allow me to do that and show me message as "The value for maximum concurrent drives used for backup must be from 0 to 2"

Can anyone have idea why I can't change it from 2 to 4 ?

I attached snapshot in attachments

[sdo]

You cannot increase the concurrent write drive count of any individual storage unit beyond the the number of actual tape drives in that storage unit.

If you want to use all four tape drives, then setup a new "storage unit group", and add both storage units to this new storage unit group, and then use this new storage unit group name in your backup policies and/or backup policy schedules and/or SLPs.

[XiaomingFan369]

I checked, for each policy, the "Policy Storage" is "Any available" for all of four drives

So I think I think I don't need to crate Storage Unit Group. Any other ideas ?

I attached another snapshot

[Genericus]

You are looking at it from the wrong end.

sdo is correct.

You need to create a storage unit with two drives on library1 - set as two drives, create another on library2 with two drives. THEN, create a storage GROUP, that contains BOTH units.

This can be four drives.

OR

YOu can have storage unit1 and storage unit2 for the libraries, each with two drives, and retain use any storage, but I do not know if this will use all four drives.

[XiaomingFan369]

Thanks fory your suggestion, could you give me more details about that?

How to create new storage unit with two drives on Library 1 and 2 ?

[Marianne]

Are both tape libraries connected to the same master/media server or different media servers ? You will have 2 robots in Devices section of NBU GUI, probably TLD(0) and TLD(1). This means you need to have a different Storage Unit for each of the robots. If you added the devices through the Device Config wizard, you would've been prompted at the end to add Storage Units, and 2 would've been created. *** Edit *** I see your STU selection shows 4 STUs, 4 robots! Why is that?! Do you have 2 or 4 robots?

[Marianne]

Please help us to help you to fix your storage unit config to match the devices.

Show us output of the following commands:

(command is in <install-path>\veritas\netbackup\bin\admincmd)
bpstulist -U

(from <install-path>\veritas\volmgr\bin):
tpconfig -l
vmoprcmd -d

[XiaomingFan369]

E:\Program Files\Veritas\NetBackup\bin\admincmd>bpstulist -U

Label:                nmin62k3l07-hcart2-robot-tld-1
Storage Unit Type:    Media Manager
Host Connection:      nmin62k3l07
Number of Drives:     2
On Demand Only:       no
Max MPX/drive:        4
Density:              hcart2 - 1/2 Inch Cartridge 2
Robot Type/Number:    TLD / 2
Max Fragment Size:    1048576 MB

Label:                nmin62k3l07-hcart2-robot-tld-0
Storage Unit Type:    Media Manager
Host Connection:      nmin62k3l07
Number of Drives:     2
On Demand Only:       no
Max MPX/drive:        4
Density:              hcart2 - 1/2 Inch Cartridge 2
Robot Type/Number:    TLD / 2
Max Fragment Size:    1048576 MB

Label:                nmin62k3l07-hcart2-robot-tld-2
Storage Unit Type:    Media Manager
Host Connection:      _STU_NO_DEV_HOST_
Number of Drives:     2
On Demand Only:       no
Max MPX/drive:        4
Density:              hcart2 - 1/2 Inch Cartridge 2
Robot Type/Number:    TLD / 3
Max Fragment Size:    1048576 MB

Label:                nmin62k3l07-hcart2-robot-tld-3
Storage Unit Type:    Media Manager
Host Connection:      _STU_NO_DEV_HOST_
Number of Drives:     2
On Demand Only:       no
Max MPX/drive:        4
Density:              hcart2 - 1/2 Inch Cartridge 2
Robot Type/Number:    TLD / 3
Max Fragment Size:    1048576 MB

[XiaomingFan369]

E:\Program Files\Veritas\Volmgr\bin>tpconfig -l
Device Robot Drive       Robot                    Drive                 Device

Type     Num Index  Type DrNum Status  Comment    Name                  Path

robot      2    -    TLD    -       -  -          -                     {3,0,0,1
}
  drive    -    0 hcart2    1      UP  -          HP.ULTRIUM5-SCSI.000  {2,0,0,0
}
  drive    -    1 hcart2    2      UP  -          HP.ULTRIUM5-SCSI.001  {3,0,0,0
}
robot      3    -    TLD    -       -  -          -                     {5,0,0,1
}
  drive    -    2 hcart2    1      UP  -          HP.ULTRIUM5-SCSI.002  {4,0,0,0
}
  drive    -    3 hcart2    2      UP  -          HP.ULTRIUM5-SCSI.003  {5,0,0,0
}

[XiaomingFan369]

E:\Program Files\Veritas\Volmgr\bin>vmoprcmd -d

                                PENDING REQUESTS

                                     <NONE>

                                  DRIVE STATUS

Drv Type   Control  User      Label  RecMID  ExtMID  Ready   Wr.Enbl.  ReqId
  0 hcart2   TLD               Yes   L5082   L5082    Yes     Yes        0
  1 hcart2   TLD               Yes   L5123   L5123    Yes     Yes        0
  2 hcart2   TLD                -                     No       -         0
  3 hcart2   TLD                -                     No       -         0

                             ADDITIONAL DRIVE STATUS

Drv DriveName            Shared    Assigned        Comment
  0 HP.ULTRIUM5-SCSI.000  No       nmin62k3l07
  1 HP.ULTRIUM5-SCSI.001  No       nmin62k3l07
  2 HP.ULTRIUM5-SCSI.002  No       -
  3 HP.ULTRIUM5-SCSI.003  No       -
 

[XiaomingFan369]

I did run your command on my Netbackup Server and already posted

Thanks

[Marianne]

So, we see that you 2 robots - TLD(2) and TLD(3). Please fix the attributes for these storage units and delete the rest: nmin62k3l07-hcart2-robot-tld-2 nmin62k3l07-hcart2-robot-tld-3 Parameters to be fixed for nmin62k3l07-hcart2-robot-tld-2: Host Connection: _STU_NO_DEV_HOST_ Robot Type/Number: TLD / 3 Select the master/media server and change robot number to 2. Parameters to be fixed for nmin62k3l07-hcart2-robot-tld-3: Host Connection: _STU_NO_DEV_HOST_ Select the master/media server.