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General description
CHARON-AXP supports emulation of an integrated virtual Acer Labs 1543C IDE/ATAPI controller.This section describes how to find proper "/dev/sg" device for CHARON mapping
Loading Acer Labs 1543C IDE/ATAPI adapter
By default the integrated virtual Acer Labs 1543C IDE/ATAPI controller is preloaded with a name "ide".
Example:
set ide container="/dev/cdrom" |
Configuration parameters
The Acer Labs 1543C IDE/ATAPI adapter emulation has only one configuration parameter:
Parameter | Type | Value |
|---|---|---|
container | Text String |
Specifies the name of ATAPI or SATA CD/DVD-ROM drive attached to the host system. By default it is left unspecified. |
Example:
set ide container="/dev/sr0" |
When running HP OpenVMS/Alpha Operating System on top of CHARON-AXP virtualization layer the specified CD/DVD-ROM drive is available as DQA0: device.
CHARON-AXP is able to boot any OpenVMS/Alpha and Tru64 version from Acer Labs 1543C IDE/ATAPI CD-ROM.
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Procedures of finding the target "/dev/sg" device
First method
In xterm console issue:
# cat /proc/scsi/sg/device_hdr; cat /proc/scsi/sg/devices |
The output will look something like:
|
The fifth field ("type") is the device type.
| Value | Device |
|---|---|
| 0 | Disk |
| 1 | Tape |
| 5 | CD-ROM |
The "N" in the "/dev/sgN" is the line number in this table (starting from 0) corresponded to the devices CHARON-AXP will use.
Thus "/dev/sg0" will be CD-ROM mapping in this example.
Second method
On a freshly booted system please issue the following command:
# dmesg | grep sg |
The output will look like that:
|
This table lists all the devices, not only the real SCSI ones (SATA/IDE for example). CHARON supports only real SCSI devices.