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Comment: irq_bus=isa is added

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Every instance of KGPSA-CA works in one of the three following two following modes:

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Syntax for loading KGPSA-CA storage adapter:

load KGPSA <name>

Example:

load KGPSA FGA


Note

In AlphaStation 400 configuration use the following syntax for KGPSA-CA storage adapter loading:

load KGPSA FGA irq_bus=isa


The adapter instance name ("FGA" in the example above) is used then for parametrization, for example:

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By default KGPSA-CA adapter uses first available PCI slot. If instead some particular slot is needed, refer to this section for details of specific placement of PCI peripherals on CHARON-AXP PCI bus.

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Back to Table of Contents

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Configuration parameters

The KGPSA-CA PCI FC adapter emulation has the following configuration parameters:

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Parameter

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Type

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host_bus_location

Parameterhost_bus_location
TypeText String
Value

(warning) Pass through mode only!

Establish connection between virtual DEC-KGPSA-CA PCI FC adapter and physical EMULEX LightPulse PCI/PCI-X/PCIe FC adapter (pass through mode)

Syntax:

load KGPSA <controller name> host_bus_location="/dev/kgpsa<X>"

Example:

load KGPSA FGA host_bus_location="/dev/kgpsa0"


wwid

Parameter

wwid[N]

N is 0..32766 (no more than 255 units)

TypeText String
Value

Sets WWID for emulated KGPSA adapter unit.

Syntax:

set <controller name> wwid[unit-number]="XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX"

Example:

set FGA wwid[2]="6008-05F3-0005-2950-BF8E-0B86-A0C7-0001"


container

Parameter

container[N]

N is 0..32766 (no more than 255 units)

Type

Text String

Value

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

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  • Physical disk

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      • "/dev/sd<L>"

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      • , where "L" is letter
      • "/dev/disk/by-id/..." - addressing by the disk ID, for example "/dev/disk/by-id/ata-ST1000DM003-9YN162_S1D01QJ4"
      • "/dev/disk/by-label/..." - addressing by the disk label, for example "/dev/disk/by-label/MyStorage"

      • "/dev/disk/by-uuid/..." - addressing by the disk UUID, for example "/dev/disk/by-uuid/0e808a2f-cdd3-4944-a245-f729ffd73882"
        (warning) Be careful not to destroy all the information from the disk dedicated to CHARON-AXP by mistake.

        Note

        Since "/dev/sd<L>" addressing is not persistent, so it is strongly recommended to use "/dev/disk/by-id/wwn-*" syntax instead to refer the disk by its WWID - especially in the enviroments utilizing FC and SAN storages.

        These disks must not be formatted by the host OS.

        Example:

        set FGA 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 FGA container[0]="/dev/sdc3"

        .

    • Multipath disk
      • "/dev/dm-<N>"
      • "/dev/mapper/mpath<N>"
      • "/dev/mapper/disk<N>"

    ...

      • (warning) 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 FGA container[200]="/dev/dm-0"

        .

    • File representing a physical disk of the HP Alpha system (disk image)
      • [<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. 

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      • Mapping may also include the full path (recommended), for example: "/my_disks/my_boot_disk.vdisk"

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      • Example:

        set FGA container[401]="my_dka401.vdisk"

        .

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

    media_type

    Parameter

    media_type[N]

    N is 0..32766 (no more than 255 units)

    Type

    Text String

    Value

    Instructs CHARON-AXP to use the supplied value as the PRODUCT field in the FC INQUIRY data returned to a software running on virtual HP Alpha system in response to FC INQUIRY command.

    If not specified, CHARON-AXP attempts to guess the FC INQUIRY data based on virtual FC device type and underlying container (which is specified in the corresponding container configuration parameter).

    Initially is not specified.

    Example:

    set FGA media_type[0]="HSZ70"


    removable

    Parameter

    removable[N]

    N is 0..32766 (no more than 255 units)

    TypeBoolean
    Value

    When set to "true", the removable configuration parameter instructs CHARON-AXP to report the corresponding virtual FC device as removable.

    By default the removable configuration parameter is set to "false".

    Example:

    set FGA removable[400]=true


    geometry

    Parameter

    geometry[N]

    N is 0..32766 (no more than 255 units)

    Type

    Text String

    Value

    This formatted string value specifies the explicit geometry of the disk storage element.

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

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     or <X>”,”<Y>[“,”<Z>][“,”<B>] where:

    ParameterDescription
    XThe number of sectors per track
    YThe 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.

    B

    The total size of the disk (in blocks) reported to the guest OS.

    If omitted it is calculated automatically.

    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.

    Example:

     

    set FGA geometry[201] =

    ...

    "255/255"


    Info

    It is possiblle to specify each parameter independently of another one. The following syntax is used for that:

    set FGA geometry[300]="*,*,*,16777210"



    use_io_file_buffering

    Parameter

    use_io_file_buffering[N]

    N is 0..32766 (no more than 255 units)

    Type

    Boolean

    Value

    When set to "true", instructs CHARON-AXP to enable host operating system I/O cache on reading/writing operations.

    (info) Note that this caching has a significant effect only in case of mapping to disk containers, not physcial 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:

    set FGA use_io_file_buffering[300]=true


     

    When a disk image connected to an emulated KGPSA-CA 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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    Mapping to host resources

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    load <controller name> host_bus_location="/dev/kgpsa<N>"

    Example:

    load KGPSA FGA host_bus_location="/dev/kgpsa0"

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    Pass Through mode establishing sequence

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    Installation of PPT driver for EMULEX LightPulse PCI/PCI-X/PCIe FC

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    Adding PPT driver for EMULEX LightPulse PCI/PCI-X/PCIe FC to Linux startup

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    StepDescription
    1Disable auto-loading of Linux standard "lpfc" driver on boot. To do that add "lpfc" to the black list file "/etc/modprobe.d/blacklist.conf"
    2

    Copy the KGPSA-CA kernel module to the location of Linux kernel modules, for example:

    # cp /opt/charon/drivers/kgpsa/ppt_kgpsa.ko /lib/modules/3.10.9-200.fc20.x86_64/kernel/drivers/scsi/

    (warning) The particular path may be different, depending on the kernel version and Linux distribution.

    3

    Enable auto load of the module:

    RedHat Linux v6.x:

    # echo modprobe ppt_kgpsa >> /etc/rc.modules

    Fedora Core Linux or RedHat Linux v7.x :

    # echo ppt_kgpsa > /etc/modules-load.d/ppt_kgpsa.conf


    4

    Regenerate new "initramfs" image with "mkinitrd":

    # mkinitrd -f /boot/initramfs-3.10.9-200.fc20.x86_64.img 3.10.9-200.fc20.x86_64

    (warning) The particular path may be different, depending on the kernel version and Linux distribution.

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