Adding tape devices to the Charon-HPA emulated HP3000 or HP9000 system is a process consisting of several steps:
- Link tape container files and/or physical tape devices with the corresponding HP3000 or HP9000 paths in the Charon configuration file and load the devices.
- Enable the tape for use by the guest operating system.
The storage on the host system just must provide enough capacity to store the tape containers used as virtual tapes by the emulated system.
The sections below describe the process in more detail.
Adding Tape Devices to the Configuration File
The new emulated tape device must be added to the configuration file of the Charon-HPA instance. This requires two commands:
Step | Configuration file entry | |
|---|---|---|
| 1 | Load the SCSI device. | load device |
| 2 | Link device with tape container file or physical tape |
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It is not necessary to create the container file manually.The parameter device encodes the device type and the device path of the emulated SCSI device presented to the guest operating system:
When loading a SCSI tape device, the parameter device has the format MKXnnn.
A tape device name has the following components:
- DD: value MK; specifies that device type is tape.
- X: value consists of an uppercase letter encoding the device path. Please refer to Emulated Model Hardware Configuration Details for system specific device path information.
Example (rp4000):
A = device path 0/0/1/0
B = device path 0/0/1/1
C = device path 0/0/2/0
D = device path 0/0/2/1 - nnn: value encodes the SCSI device connected to the SCSI controller.
Formula: (SCSI target ID*100)+LUN
LUN is always 0 for tape devices.
The following example adds a SCSI tape device with device path 0/0/1/0.6.0 (controller A, SCSI target ID 6, LUN 0) to the configuration:
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Using Tapes on MPE/iX Guest Systems
Displaying Tape Characteristics
You can use the SYSGEN > IO to display tape characteristics as shown in the following example for LDev 7:
Using :DEVCTRL in HP3000 to Load and Eject a Tape on MPE/iX Systems
:DEVCTRL is an HP-supplied script that allows several aspects of physical tape devices to be controlled: in-drive data compression, tape loading, and automatic tape eject. This script is also used with Charon-HPA to load virtual tape image files. When :DEVCTRL is used to load a virtual tape file, it causes Charon-HPA to create (if necessary) and open the virtual tape file configured in the Charon-HPA configuration file.
The :DEVCTRL syntax is show below:
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For example, to load an emulated type device on LDev 7, use the following command:
:DEVCTRL 7; LOAD=ONLINE |
Reading and Writing Tapes in MPE/iX
To read and write tapes under MPE/iX, the :STORE and :RESTORE commands are used. Please contact your Stromasys representative or partner if you need support with data backup and restore under MPE/iX.
Using Tapes on HP-UX Guest Systems
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