Figure 188. I/O Definition Reference
I/O DEFINITION REFERENCE - DEVICES TIME: 17:31 DATE: 2012-10-21 PAGE Y- 305
3490 TAPE Magnetic Tape Subsystem / 1
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UNIT=3490
Physical Configuration Information
Physical Device Types
Physical Device
3490-B20
3490-B40
Attachable to the following control units
3490-A10
3490-A20
Physical Device
(Integrated Tape Subsystem)
3490-C10
3490-C11
3490-C22
Physical Device
(Integrated Tape Subsystem inside a 3494)
3490-C1A
3490-C2A
Physical Device
3494 and 3495 are tape libraries containing automation,
library manager, one or more tape control units, storage
cells and tape cartridges. To prepare the IODF, no need
to define 3494 and 3495 explicitly. However, need to
indicate the tape devices as library tape devices by
specifying LIBRARY=YES in the device definition.
Logical Configuration Rules
For Channel Subsystem
- Up to maximum 4 channel paths for A10, 8 for A20,
2 for C1A or C2A.
- Range of 16 unit addresses for control unit. Also
accept a minimum of 2 addresses for integrated tape
subsystem.
For Operating System
- LIBRARY=YES, if devices are installed in a system-
managed IBM 3494 or IBM 3495 Tape Library.
- LIBRARY=YES or NO for BTLS managed library drives
- DYNAMIC=YES, if devices are dynamically reconfigured
- AUTOSWITCH=YES, if tape drives are dynamically switched
between system (MVS/ESA 5.2.0)
Configuration Example
CHPID PATH=(22,27),TYPE=CNC
I/O DEFINITION REFERENCE - DEVICES TIME: 17:31 DATE: 2012-10-21 PAGE Y- 306
3490 TAPE Magnetic Tape Subsystem / 2
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CNTLUNIT CUNUMBR=0501,PATH=(22,27),UNIT=3490, X
UNITADD=((00,16))
IODEVICE ADDRESS=(540,016),CUNUMBR=(0501),UNIT=3490, X
OFFLINE=YES,DYNAMIC=YES, X
USERPRM=((LIBRARY,YES),(AUTOSWITCH,YES))
Software Prerequisites
Minimum version and release to operate the device in
MVS/ESA environment:
- MVS/SP - JES2 3.1
- MVS/DFP 3.1
Minimum Product Levels
- DFSORT release 11 (release 12 for C1A,C2A)
- EREP 3.4 (3.5 for C1A,C2A)
- DFHSM 2.6
- DFDSS 2.5
References
- MVS/ESA & MVS/XA Support for 3490 Magnetic Tape
Subsystem. GC28-1141
- IBM 3490E Planning and Migration Guide GC35-0219
- IBM 3490 Planning and Migration Guide GC35-0116
Notes
- For the latest information, contact your local IBM
Marketing Representative.
-end-
Device number definition values: ADDRESS=(device number<,number-of-devices>)
device number: 1 - 4 hexadecimal number in the range 0000 - FFFF.
number-of-devices: Number of sequential device numbers to be assigned to the devices.
Minimum value: 1
Default value: 1
Maximum value: 4095
Channel Subsystem information:
------------------------------
When attached to a parallel interface:
I/O interface time out function default: TIMEOUT=YES
Status verification facility default: STADET=YES
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3490 TAPE Magnetic Tape Subsystem / 3
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Unit address: UNITADD=xx
The unit address is a hexadecimal value from 00 to FF which must be specified
in the unit address range of the control unit.
Default unit address are the last 2 digits of the device number.
MVS configuration information:
------------------------------
Generic name: 3490 It may be modified dependent on the specified features.
Support of dynamic I/O reconfiguration: Yes
Support of device numbers greater than 0FFF: Yes
Support of UCBs above 16 MB storage: Yes
Required parameters: None.
Optional parameters:
OFFLINE Device considered online or offline at IPL
Default value: OFFLINE=NO
Specifies whether MVS is to consider the device
online or offline at IPL.
Yes The device is considered offline at IPL.
No The device is considered online at IPL.
(Default)
If MVS needs the device during IPL, specify No.
DYNAMIC Device supports dynamic configuration
Specify yes to indicate that the device is to be
eligible for Dynamic I/O Configuration.
LIBRARY Device supports auto tape library
Data type is YES or NO
Pre-selected: No
Specify YES to indicate that the device belongs
to an automated tape library.
AUTOSWITCH Device is automatically switchable
Data type is YES or NO
Pre-selected: No
Specify YES to indicate that the device should
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3490 TAPE Magnetic Tape Subsystem / 4
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be treated as an automatically switchable device
Supported features:
ALTCTRL Separate physical control unit path
Specify Yes to indicate that there is a separate
physical control unit path to the device.
SHARABLE Device is Sharable between systems
Specify Yes to indicate that the 3803 two-channel
switch is used for partitioning and that magnetic
tape drives can be shared between two processors.
Do not allocate or unload a shared tape drive.
If specify Yes for SHARABLE, HCD forces a value of
Yes for the OFFLINE parameter, even if you specify
No for OFFLINE.
COMPACT Compaction
Specify Yes to indicate that compaction is
available for tape devices.
Compaction is a method of compressing and encoding
data in order to reduce storage space.
I/O DEFINITION REFERENCE - DEVICES TIME: 17:31 DATE: 2012-10-21 PAGE Y- 403
INDEX
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AFP1-0 ...... Y- 1 3088 ........ Y- 95 3279-2C ..... Y- 209 3480 ........ Y- 300
BCTC ........ Y- 3 3151 ........ Y- 97 3279-2X ..... Y- 116 3481 ........ Y- 116
BSC1 ........ Y- 5 3160 ........ Y- 98 3279-3 ...... Y- 216 3482 ........ Y- 116
BSC2 ........ Y- 8 3161 ........ Y- 100 3279-3A ..... Y- 217 3483 ........ Y- 116
BSC3 ........ Y- 11 3162 ........ Y- 101 3279-3B ..... Y- 223 3490 ........ Y- 306
....................................................................................................................
z/OS HCD User's Guide
Copyright IBM Corporation 1990, 2014