PowerPath and hp-ux 11.31 ia
星期一, 五月 25th, 2009When running PowerPath Version 5.1 on HP-UX 11i v3, note the
following:
◆ PowerPath Version 5.1 SP1 for HP-UX supports HP-UX 11i v3
only with minimum qualified level September 2008 HP-UX.
If you are running HP-UX 11i v3 (March 2008), do one of the
following:
• Install the following patches from HP: PHKL_38053,
PHKL_38054, PHCO_38047, PHCO_38064, PHCO_38071.
• Upgrade to HP-UX 11i v3 (September 2008).
◆ With CLARiiON arrays, PowerPath Version 5.1 SP1 on HP-UX
11i v3 supports only the ALUA failover mode. The PNR failover
mode is not supported with HP-UX 11i v3.
◆ HP-UX 11i v3 does not support iSCSI attached devices.
◆ PowerPath Version 5.1 supports only legacy-style device special
files (DSFs). New style DSFs are not supported.
By default, after PowerPath installation, legacy style addressing is
enabled in HP-UX 11i v3. Do not explicitly disable legacy style
addressing before or after installing PowerPath. Disabling legacy
addressing will prevent PowerPath from seeing devices.
Type insf -Lv to verify whether legacy mode is enabled.
◆ PowerPath Version 5.1 disables native multipathing at the device
level for legacy-style devices. When devices are configured for
PowerPath, (for example, when you run powermt config)
PowerPath disables native multipathing on the devices it
manages by setting to false the leg_mpath_enable attribute.
Do not change this setting to enable native multipathing for
legacy-style devices while PowerPath is installed. Uninstalling
PowerPath re-enables multipathing for legacy-style devices (the
default HP-UX setting).
Refer to the HP-UX 11i v3 documentation for more information
on legacy style addressing in HP-UX 11i v3.
◆ In earlier releases of HP-UX, failed file system I/Os were retried
indefinitely. HP-UX 11i v3 by default no longer retries failed I/Os
indefinitely, but instead returns I/O errors to the file system after
a finite number of retries. This results in file system error
messages if all paths to a LUN are disabled manually or fail due
to hardware problems. PowerPath does not alter this behavior on
HP-UX 11i v3. You can restore the infinite retry on a per device
basis using the HP-UX scsimgr command, as follows:
scsimgr set_attr -D /dev/rdisk/diskX -a infinite_retries_enable=true
Refer to the HP website and documentation for more information.
following:
◆ PowerPath Version 5.1 SP1 for HP-UX supports HP-UX 11i v3
only with minimum qualified level September 2008 HP-UX.
If you are running HP-UX 11i v3 (March 2008), do one of the
following:
• Install the following patches from HP: PHKL_38053,
PHKL_38054, PHCO_38047, PHCO_38064, PHCO_38071.
• Upgrade to HP-UX 11i v3 (September 2008).
◆ With CLARiiON arrays, PowerPath Version 5.1 SP1 on HP-UX
11i v3 supports only the ALUA failover mode. The PNR failover
mode is not supported with HP-UX 11i v3.
◆ HP-UX 11i v3 does not support iSCSI attached devices.
◆ PowerPath Version 5.1 supports only legacy-style device special
files (DSFs). New style DSFs are not supported.
By default, after PowerPath installation, legacy style addressing is
enabled in HP-UX 11i v3. Do not explicitly disable legacy style
addressing before or after installing PowerPath. Disabling legacy
addressing will prevent PowerPath from seeing devices.
Type insf -Lv to verify whether legacy mode is enabled.
◆ PowerPath Version 5.1 disables native multipathing at the device
level for legacy-style devices. When devices are configured for
PowerPath, (for example, when you run powermt config)
PowerPath disables native multipathing on the devices it
manages by setting to false the leg_mpath_enable attribute.
Do not change this setting to enable native multipathing for
legacy-style devices while PowerPath is installed. Uninstalling
PowerPath re-enables multipathing for legacy-style devices (the
default HP-UX setting).
Refer to the HP-UX 11i v3 documentation for more information
on legacy style addressing in HP-UX 11i v3.
◆ In earlier releases of HP-UX, failed file system I/Os were retried
indefinitely. HP-UX 11i v3 by default no longer retries failed I/Os
indefinitely, but instead returns I/O errors to the file system after
a finite number of retries. This results in file system error
messages if all paths to a LUN are disabled manually or fail due
to hardware problems. PowerPath does not alter this behavior on
HP-UX 11i v3. You can restore the infinite retry on a per device
basis using the HP-UX scsimgr command, as follows:
scsimgr set_attr -D /dev/rdisk/diskX -a infinite_retries_enable=true
Refer to the HP website and documentation for more information.
