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set session hw_model="VAX_4000_Model_108"

load virtual_serial_line/chserial OPA0 port=10003 application="putty.exe -load OPA0"
set quart line[3]=OPA0

set PAA container[0]="C:\Charon\Disks\dia0-rz24-vms-v6.2.vdisk"
set PAA container[1]="C:\Charon\Disks\dia1-rz24-vms-v6.2.vdisk"

$ show devices d

Device                 Device           Error   Volume         Free  Trans Mnt
  Name                  Status           Count    Label        Blocks Count Cnt
004200$DIA0:           Mounted              0   DSSI01         32022   147   1
004201$DIA1:           Online               0

set session hw_model="VAX_4000_Model_108"

load virtual_serial_line/chserial OPA0 port=10003 application="putty.exe -load OPA0"
set quart line[3]=OPA0

set PAA container[0]="C:\Charon\Disks\dia0-rz24-vms-v6.2.vdisk"
set PAA container[1]="C:\Charon\Disks\dia1-rz24-vms-v6.2.vdisk"

$ show devices d

Device                 Device           Error   Volume         Free  Trans Mnt
  Name                  Status           Count    Label        Blocks Count Cnt
004200$DIA0:           Mounted              0   DSSI01         32022   147   1
004201$DIA1:           Online               0

dssi_host

Text String

A string value that specifies the instance name of an emulated SHAC host adapter serving the virtual DSSI network.

If this value is not set, CHARON-VAX will try to locate the host adapter automatically. This automatic lookup works only if the CHARON-VAX configuration has exactly one instance of an emulated SHAC host adapter.

dssi_node_id

Numeric

An integer value that specifies the address of an emulated HSD50 storage controller on the virtual DSSI network.

Possible values are from 0 through 7 (initially set to 0).

scs_node_name

Text String

A string value that specifies the instance name of an emulated SHAC host adapter serving the virtual DSSI network.

If this value is not set, CHARON-VAX will try to locate the host adapter automatically. This automatic lookup works only if the CHARON-VAX configuration has exactly one instance of an emulated SHAC host adapter.

dssi_nodethe SCSNODENAME of the emulated HSD50 storage controller.

The string can contain as many as 6 characters. Possible characters are uppercase letters: A through Z, and the integers: 0 through 9.

Initially set to the name of the emulated HSD50 controller. Therefore, the name of the emulated HSD50 controller should follow the above rules.

scs_system_id

Numeric

An integer value that specifies the SCSSYSTEMID of the address of an emulated HSD50 storage controller on the virtual DSSI network.

Possible values are from 0 through 7 (initially set to 0).

scs_node_name

Text String

A string value that specifies the SCSNODENAME of the emulated HSD50 storage controller.

The string can contain as many as 6 characters. Possible characters are uppercase letters: A through Z, and the integers: 0 through 9.

Initially set to the name of the emulated HSD50 controller. Therefore, the name of the emulated HSD50 controller should follow the above rules.

scs_system_id

Numeric

An integer value that specifies the SCSSYSTEMID of the emulated HSD50 storage controller.

Initially set to an arbitrary value that is guaranteed to be unique within the running emulated VAX 4000 model 106, 108, 700 and 705 node.

mscp_allocation_class

Numeric

An integer value that specifies the ALLOCLASS of the emulated HSD50 storage controller.

Possible values are 0 through 255 (initially set to 0).

container[N]

N=0…9999

Text String

A string value that specifies the container of the storage element with MSCP unit number: N. This storage element might be either a (virtual) disk or tape. In VMS running on an emulated VAX 4000 node, these storage elements appear as HSX00 disks (DUAN:) or HST00 tapes (MUAN:).

Possible values of the parameter are strings in one of the following forms:

DevID addresses the target physical disk by its WWID
(hexadecimal 128-bit identifier assigned to the disk
drive by its manufacturer/originator).

Example:

For iSCSI disks

iScsiTarget addresses the disk by its iSCSI target name.
LUN specifies LUN on connected iSCSI disk. 

Example:

mscp_allocation_class

Numeric

An integer value that specifies the ALLOCLASS of the emulated HSD50 storage controller.

Possible values are 0 through 255 (initially set to 0).

container[N]

N=0…9999

Text String

A string value that specifies the container of the storage element with MSCP unit number: N. This storage element might be either a (virtual) disk or tape. In VMS running on an emulated VAX 4000 node, these storage elements appear as HSX00 disks (DUAN:) or HST00 tapes (MUAN:).

Possible values of the parameter are strings in one of the following forms:

This parameter is initially not set, thus creating NO storage elements on the controller

This parameter is initially not set, thus creating NO storage elements on the controller

media_type[N]

N=0…9999

Text String

Overrides the default (automatically determined) MSCP media type of the device.

Syntax:

where:

• <device-name> is either: “DU”, “MU”, “DK”, “MK”, “SCSI”, “DI”, “MI”, “DSSI”, “DJ” or “MJ”

• <device-type> is the form of: “LLD” or “LLLD”, where “L” is a letter from A through Z, and “D” is a decimal number from 0 through 99

If not specified, the device name is set to “DI” and the device type is selected based on disk size for disk storage elements. For tape storage elements, the device name and type are set to "MI" and "TF86" respectively. 

Initially not specified.

geometry [N]

N=0…9999

Text String

Overrides the default (automatically determined) MSCP media type of the device.

Syntax:

where:

• <device-name> is either: “DU”, “MU”, “DK”, “MK”, “SCSI”, “DI”, “MI”, “DSSI”, “DJ” or “MJ”

• <device-type> is the form of: “LLD” or “LLLD”, where “L” is a letter from A through Z, and “D” is a decimal number from 0 through 99

If not specified, the device name is set to “DI” and the device type is selected based on disk size for disk storage elements. For tape storage elements, the device name and type are set to "MI" and "TF86" respectively. 

Initially not specified.

geometry [N]

N=0…9999

Text String

This formatted string value specifies the explicit geometry of the disk storage element with DSSI node ID: N and MSCP unit number: N. This parameter is not applicable to tape storage elements.

The string format is <X>”/”<Y>[“/”<Z>] where:

1. X is the number of sectors per track

2. Y is the number of tracks per cylinder

3. Z (optional) is the number of cylinders on the unit. If omitted, Z is calculated based on X, Y and the total number of sectors on the unit that reflects the size of the disk storage element

If this parameter is not set, CHARON-VAX will configure the geometry based on the most probable disk type.

Initially not set.

The syntax above is applicable only to disk storage elements.

If the container is a tape image, the following format is used:

Syntax:

where:

This formatted string value specifies the explicit geometry of the disk storage element with DSSI node ID: N and MSCP unit number: N. This parameter is not applicable to tape storage elements.

The string format is <X>”/”<Y>[“/”<Z>] where:

1. X is the number of sectors per track

2. Y is the number of tracks per cylinder

3. Z (optional) is the number of cylinders on the unit. If omitted, Z is calculated based on X, Y and the total number of sectors on the unit that reflects the size of the disk storage element

If this parameter is not set, CHARON-VAX will configure the geometry based on the most probable disk type.

Initially not set.

The syntax above is applicable only to disk storage elements.

If the container is a tape image, the following format is used:

Syntax:

where:

use_io_file_buffering[N]

N=0…9999

Text String

Instructs CHARON-VAX to enable host operating system I/O cache on reading/writing operations.

The following values are possible:

• "true" or "write-back" - the "write back" caching mode is used

• "write-through" - the "write through" caching mode is used

• "false" - caching is switched off

 Note that this caching has a significant effect only in case of mapping to disk and tape containers, not physical drives.

When enabled, host operating system I/O cache may significantly improve I/O performance of the virtual system. At the same time maintaining I/O cache requires additional host resources (CPU and memory) which may negatively affect overall performance of the virtual system.

Initially is set to "false".

Example:

N=0…9999

Boolean

Enables use of the host OS I/O buffering.

set session hw_model="VAX_4000_Model_108"

load virtual_serial_line/chserial OPA0 port=10003 application="putty.exe -load OPA0"
set quart line[3]=OPA0

load HSD50 DISKS dssi_host=PAA dssi_node_id=1

set DISKS container[0]="C:\Charon\Disks\dua0-rz24-vms-v6.2.vdisk"
set DISKS container[1]="C:\Charon\Disks\dua1-rz24-vms-v6.2.vdisk"

load HSD50 TAPES dssi_host=PAA dssi_node_id=2

set TAPES container[3]="\\.\Tape0"

$ show devices d

Device                 Device           Error    Volume         Free  Trans Mnt
  Name                  Status           Count     Label        Blocks Count Cnt
DISKS$DUA0:           Mounted              0      DSSI01       31932   147   1
DISKS$DUA1:           Online               0
$ show devices m

Device                 Device           Error    Volume         Free  Trans Mnt
 Name                  Status           Count     Label        Blocks Count Cnt
TAPES$MUA3:           Online               0