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Parameter | Type | Value |
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| scsi_id | Numeric | Specifies SCSI ID of KZPBA PCI SCSI Adapter in a range 0..7 By default the "scsi_id" configuration parameter is set to 7. Example: |
| host, port | Text String | These parameters are used in SCSI cluster configurations. | Parameter | Description |
|---|
| host | Specifies remote end-point (remote host name and, optionally, TCP/IP port on remote host) of SCSI connection between this KZPBA PCI SCSI adapter and remote KZPBA PCI SCSI adapter on some host. | | port | Specifies local end-point (TCP/IP port on local host) of SCSI connection between this KZPBA PCI SCSI adapter and remote KZPBA PCI SCSI adapter on some host. |
By default the "host" and "port" configuration options are not specified. Syntax: port[connection-number]=<local port> host[connection-number]=”<host-name{:tcpip-port-no}>” |
where: connection_number = remote_scsi_id * 100 + lun_id Example: set PKA port[600]=17060 host[600]=”localhost:16070" |
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container[N] N is "XXYY" number,
where
XX - SCSI ID (0..15)
YY - LUN (00..07) | Text String | Possible values of the parameter are strings in one of the following forms: | Mapping | Description |
|---|
| "/dev/sd<L>" | Mapping to physical disk. "L" is letter here.  Be careful not to destroy all the information from the disk dedicated to CHARON-AXP by mistak. These disks must not be formatted by the host OS. Example: set PKA container[0]="/dev/sdb" |
It is also possible to use not a whole disk, but previously created partitions on it. In this case the syntax is the following: "/dev/sd<L><N>" where N is the number of partition to be used. Example: set PKA container[0]="/dev/sdc1" |
| "/dev/dm-<N>"
"/dev/mapper/mpath<N>"
"/dev/mapper/disk<N>" | Mapping to multipath disk. Be careful not to destroy all the information from the disk dedicated to CHARON-AXP by mistake. These disks must not be formatted by the host OS. Example: set PKA container[100]="/dev/dm-0" |
| | "/dev/sg<N>" | Direct mapping to some SCSI device, for example, a SCSI disk or tape reader. Example: set PKA container[200]="/dev/sg0" |
| "/dev/sr<N>"
"/dev/cdrom"
"/dev/cdrom<N> | Mapping to CD-ROM device. Example: set PKA container[400]="/dev/sr0" |
| | [<drive>":\"<path-name>”\”]<file-name>[“.iso”] | Mapping to an ISO file for reading distribution CD-ROM image. Mapping may also include the full path (recommended), for example: "/my_disks/vms_distributive.iso" Example: set PKA container[600]="/my_disks/vms_distributive.iso" |
| | [<drive>":\"<path-name>”\”]<file-name>[“.vdisk”] | Mapping to the file representing a physical disk of the HP Alpha system (disk image). These files can be created from scratch with "mkdskcmd" utility. Data and OS disk backups are transferred from the original system via tapes or network and restored into these container files. Mapping may also include the full path, for example: "/my_disks/my_boot_disk.vdisk" Example: set PKA container[401]="my_dka401.vdisk" |
| | [<drive>":\"<path-name>”\”]<file-name>“.vtape” | Mapping to the file representing the tape (tape image). These files are created automatically. Mapping may also include a full path (recommended), for example: "/my_tapes/backup.vtape" Example: set PKA container[500]="my_mka500.vtape" |
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This parameter is initially not set, thus creating NO storage elements on the controller. |
media_type[N] N is "XXYY" number,
where
XX - SCSI ID (0..15)
YY - LUN (00..07) | Text String | Instructs CHARON-AXP to use the supplied value as the PRODUCT field in the SCSI INQUIRY data returned to a software running on virtual HP Alpha system in response to SCSI INQUIRY command. If not specified, CHARON-AXP attempts to guess the SCSI INQUIRY data based on virtual SCSI device type and underlying container (which is specified in the corresponding container configuration parameter). Initially is not specified. Example: set PKA media_type[0]=”HSZ70" |
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removable[N] N is "XXYY" number,
where
XX - SCSI ID (0..15)
YY - LUN (00..07) | Boolean | When set to "true", the removable configuration parameter instructs CHARON-AXP to report the corresponding virtual SCSI device as removable. By default the removable configuration parameter is set to "false". Example: set PKA removable[400]=true |
 Note that virtual SCSI tapes and CD-ROM devices are always reported as removable regardless of the "removable" configuration parameter.
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geometry [N] N is "XXYY" number,
where
XX - SCSI ID (0..15)
YY - LUN (00..07) | Text String | This formatted string value specifies the explicit geometry of the disk storage element. This parameter is not applicable to tape storage elements. The string format is <X>”/”<Y>[“/”<Z>] where: | Parameter | Description |
|---|
| X | The number of sectors per track | | Y | The number of tracks per cylinder | | Z | 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. This is an optional parameter. |
If this parameter is not set, CHARON-AXP will configure the geometry based on the most probable disk type. Initially not set. The syntax described above is applicable only to disk storage elements. If the container is a tape image, the following format is used instead: Syntax: "<image-size>[, <early-warning-zone-size>]" |
where: | Parameter | Description |
|---|
| image-size | The tape size in MB | | early-warning-zone-size | The size (in KB) of the space left on the tape when a warning to the OS is issued. If omitted, 64K is assumed. |
Example: set PKA geometry[603] = "255/255" |
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use_io_file_buffering[N] N is "XXYY" number,
where
XX - SCSI ID (0..15)
YY - LUN (00..07) | Boolean | When set to "true", instructs CHARON-AXP to enable host operating system I/O cache on reading/writing operations. 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: set PKA use_io_file_buffering[603]=true |
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When a tape or disk image connected to an emulated KZPBA controller is dismounted by OpenVMS, it is disconnected from CHARON-AXP and can be manipulated. It can be replaced with a different disk image if it keeps the same name. This capability may be useful when designing back-up and restore procedures. When copying CHARON-AXP disk images while CHARON-AXP is running, please take care to minimize the risk of overloading a heavily loaded CHARON-AXP host system. For example, using a sequential series of simple ftp binary copies is less resource intensive and thus less disruptive than multiple, simultaneous copies.
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