Dell PowerStore 5200T EMC PowerStore Host Configuration Guide - Page 87

HP-UX Host Parameter Settings, Maximum Transfer Length, Multipathing Software Configuration

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HP-UX Host Parameter Settings This section describes the HP-UX host parameter settings required for optimal configuration when using Dell Technologies PowerStore storage. NOTE: PowerStore is supported only with HP-UX version lliv3. HP-UX versions lliv2 and lliv1 are only supported with the volume set addressing method, which currently is not available with PowerStore. To configure HP-UX lliv3 with PowerStore make sure that the following requirements are met: ● PowerStore supports only native MPIO on HP-UX lliv3. For further details refer to the section. ● Maximum request transfer length of PowerStore array is 2048 blks (512 byte blks) for a maximum transfer length of 1MB. Maximum Transfer Length HP-UX lliv3 implements a default maximum transfer length of 2 MB and does not have support for VPD page B0h. A tunable parameter, named escsi_maxphys, enables the modification of its FC fcp maximum transfer length. You can configure escsi_maxphys as follows: ● Reset to default during host reboot: scsimgr set_attr -a escsi_maxphys= ● Persistent through reboot scsimgr save_attr -a escsi_maxphys= The set value is defined in 4 KB increments. To support the PowerStore devices in HP-UX, change the escsi_maxphys value to 256 using the following commands: ● 1 MB max transfer length, reset to default 2 MB during host reboot: scsimgr set_attr -a escsi_maxphys=256 ● 1 MB max transfer length persistent through reboot scsimgr save_attr -a escsi_maxphys=256 NOTE: You can configure the escsi_maxphys attribute only on a global basis, and it applies for all FC fcp black devices that are connected to the host. Multipathing Software Configuration This topic introduces Multipathing Software Configuration for HP-UX PowerStore supports only native multipathing using multipath I/O (MPIO) with HP-UX lliv3. NOTE: Other non-native multipathing software, such as PowerPath or Veritas Dynamix Multipathing (DMP), are not supported. Configuring Native Multipathing Using HP-UX Multipath I/O (MPIO) This topic describes configuring native multipathing using HP-UX Multipath I/O (MPIO). For optimal operation with PowerStore storage, configure the following HP-UX native multipathing parameters at their default values: Host Configuration for HP-UX 87

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HP-UX Host Parameter Settings
This section describes the HP-UX host parameter settings required for optimal configuration when using Dell Technologies
PowerStore storage.
NOTE:
PowerStore is supported only with HP-UX version lliv3. HP-UX versions lliv2 and lliv1 are only supported with the
volume set addressing method, which currently is not available with PowerStore.
To configure HP-UX lliv3 with PowerStore make sure that the following requirements are met:
●
PowerStore supports only native MPIO on HP-UX lliv3. For further details refer to the <Multipathing Software
Configuration> section.
●
Maximum request transfer length of PowerStore array is 2048 blks (512 byte blks) for a maximum transfer length of 1MB.
Maximum Transfer Length
HP-UX lliv3 implements a default maximum transfer length of 2 MB and does not have support for VPD page B0h. A tunable
parameter, named
escsi_maxphys
, enables the modification of its FC fcp maximum transfer length. You can configure
escsi_maxphys
as follows:
●
Reset to default during host reboot:
scsimgr set_attr -a escsi_maxphys=<value>
●
Persistent through reboot
scsimgr save_attr -a escsi_maxphys=<value>
The set value is defined in 4 KB increments. To support the PowerStore devices in HP-UX, change the
escsi_maxphys
value
to 256 using the following commands:
●
1 MB max transfer length, reset to default 2 MB during host reboot:
scsimgr set_attr -a escsi_maxphys=256
●
1 MB max transfer length persistent through reboot
scsimgr save_attr -a escsi_maxphys=256
NOTE:
You can configure the
escsi_maxphys
attribute only on a global basis, and it applies for all FC fcp black devices
that are connected to the host.
Multipathing Software Configuration
This topic introduces Multipathing Software Configuration for HP-UX
PowerStore supports only native multipathing using multipath I/O (MPIO) with HP-UX lliv3.
NOTE:
Other non-native multipathing software, such as PowerPath or Veritas Dynamix Multipathing (DMP), are not
supported.
Configuring Native Multipathing Using HP-UX Multipath I/O
(MPIO)
This topic describes configuring native multipathing using HP-UX Multipath I/O (MPIO).
For optimal operation with PowerStore storage, configure the following HP-UX native multipathing parameters at their default
values:
Host Configuration for HP-UX
87