OSB with HP MSL2024

Hi
I have a HP MSL2024 library with two tape drives. When I submit two jobs in the OSB home page I see that backups run concurrently:
library MSL2024 in use by obrobotd on rubxyz, process 21569
drive (1) dte1 in use by obrobotd on rubxyz, process 21569
drive (2) dte2 in use by obrobotd on rubxyz, process 21569
but when I login to HP storage msl2024 tape library webpages I see on the system status that always one of the drives is writing. Never both. For example. For a few seconds drive 1 has status writing, the second drive status is idle, for the next few seconds both drives are idle and for the next few seconds first drive is idle and the second is writing. So backups don't run concurrently but in turn and very slow.
What could be the reason of such behavior?? Is a problem with configuration of the OSB or the HP tape library or somthing else??
thanks for help
Jan

Still the same problem
MSL2024:
Device type: library
Model: [none]
Serial number: [none]
In service: yes
Debug mode: no
Barcode reader: yes
Barcodes required: no
Auto clean: no
Clean interval: (not set)
Clean using emptiest: yes
Unload required: yes
Ejection type: auto
Min writable volumes: 0
UUID: b1cad8e6-af07-102b-b80f-001438b8cffc
Attachment 1:
Host: rubryk-pl
Raw device: /dev/sg1
Connection type: [unknown]
Reservation 1:
Component: obrobotd
Host: rubryk-pl
Process: 25450
Inquiry data:
Vendor: HP
Product: MSL G3 Series
Firmware: 4.20
Serial number: DEC06220KE
Element counts / addresses:
1 mte: 0
23 se : 1001 - 1023
1 iee: 101
2 dte: 1 - 2
Moves:
From mte, to: mte 0 se 1 iee 1 dte 1
From se, to: mte 0 se 1 iee 1 dte 1
From iee, to: mte 0 se 1 iee 0 dte 1
From dte, to: mte 0 se 1 iee 1 dte 1
Ok_ops: move=1, reserve=1 sense_dev=1, sense_ele=1, unload_any=1, sense_dev_range=1
Device characteristics: two_d=0, is_120=0, fake_mte=0, fake_iee=0, one_target=0
State of barcode reader: present
Display: none
Dte 1: target 4 lun * name dte1 (raw device name /dev/sg0)
warning: dte 1 may be misconfigured; (on bus 0) is at target 0, lun 5,
which doesn't match the information provided by the library.
Dte 2: target 5 lun * name dte2 (raw device name /dev/sg2)
warning: dte 2 may be misconfigured; (on bus 0) is at target 0, lun 5,
which doesn't match the information provided by the library.
Warning: bus info unknown or drive not installed
dte1:
Device type: tape
Model: [none]
Serial number: [none]
In service: yes
Library: MSL2024
DTE: 1
Automount: yes
Error rate: 8
Query frequency: [undetermined]
Debug mode: no
Blocking factor: (default)
Max blocking factor: (default)
Current tape: 2
Use list: all
Drive usage: 4 hours, 41 minutes
Cleaning required: no
UUID: aa02df66-af0f-102b-b80f-001438b8cffc
Attachment 1:
Host: rubryk-pl
Raw device: /dev/sg0
Connection type: [unknown]
Reservation 1:
Component: obrobotd
Host: rubryk-pl
Process: 25450
Reservation 2:
Component: obtar
Host: rubryk-pl
Process: 25560
Reservation 3:
Component: observiced
Host: rubryk-pl
Process: 6374
Inquiry data:
Vendor: HP
Product: Ultrium 3-SCSI
Firmware: D22W
Serial number: HU10823PAR
Hardware compression: not available
dte2:
Device type: tape
Model: [none]
Serial number: [none]
In service: yes
Library: MSL2024
DTE: 2
Automount: yes
Error rate: 8
Query frequency: [undetermined]
Debug mode: no
Blocking factor: (default)
Max blocking factor: (default)
Current tape: 4
Use list: all
Drive usage: 4 hours, 38 minutes
Cleaning required: no
UUID: e7e9ec0c-af0f-102b-b80f-001438b8cffc
Attachment 1:
Host: rubryk-pl
Raw device: /dev/sg2
Connection type: [unknown]
Reservation 1:
Component: obrobotd
Host: rubryk-pl
Process: 25450
Reservation 2:
Component: obtar
Host: rubryk-pl
Process: 25636
Reservation 3:
Component: observiced
Host: rubryk-pl
Process: 6374
Inquiry data:
Vendor: HP
Product: Ultrium 3-SCSI
Firmware: D22W
Serial number: HU10823P9R
Hardware compression: not available
sg_map -x -i
/dev/sg0 0 0 4 0 1 /dev/nst0 HP Ultrium 3-SCSI D22W
/dev/sg1 0 0 4 1 8 HP MSL G3 Series 4.20
/dev/sg2 0 0 5 0 1 /dev/nst1 HP Ultrium 3-SCSI D22W

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