Red Hat ENTERPRISE LINUX 4.5.0 - Instrukcja Użytkownika Pobierz pdf (Strona 19)

EMC PowerPath for Linux Version 4.5 and Point Releases Release Notes

Technical Notes

This section contains additional information on PowerPath not

covered in the core documents.

Supporting More Than 256 Storage Devices

Complete the following steps to support more than 256 storage

devices on a host.

On RHEL and SuSE Hosts

If using Emulex HBAs on a SuSE or RHEL host:

1. Edit the

/etc/modprobe.conf file (RHEL) or the

/etc/modprobe.conf.local file (SuSE) and set the

lpfc_max_luns parameter to 1024. For example:

options lpfc lpfc_nodev_tmo=10 lpfc_max_luns=1024

Note: Refer to Chapter 1, “Installing PowerPath,” in the PowerPath 4.5 for

Linux Installation Guide for more information on setting HBA parameters,

including lpfc_nodev_tmo, for PowerPath.

2. Create a new RAM disk and reboot the host.

On SuSE Hosts

If using Emulex or Qlogic HBAs on a SuSE host:

1. Issue the

chkconfig boot.udev on command.

2. Edit the

/etc/sysconfig/hotplug file and set the

HOTPLUG_USING_SUBFS parameter to no:

HOTPLUG_USE_SUBFS=no

3. Reboot the host.

Linux iostat Command

The Linux iostat command does not display I/O statistics for EMC

pseudo devices.

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Red Hat ENTERPRISE LINUX 4.5.0 - Instrukcja Użytkownika Strona 19