Red Hat ENTERPRISE LINUX 4.5.0 - Manual do Utilizador descarregar pdf (Página 16)

EMC PowerPath for Linux Version 4.5 and Point Releases Release Notes

Known Problems and Limitations

This section describes the known problems and limitations in

PowerPath 4.5.x for Linux.

Known Problems

The following problems have been reported for PowerPath 4.4.x and

4.5.x for Linux.

Table 1-7 Known Problems in PowerPath

Description

Found in

Version Workaround

235687

PowerPath SE (the unlicensed version of PowerPath) does not support

back-end failover for storage systems that are attached through iSCSI on

hosts that are running RHEL4 U2 and higher.

4.5.1 None.

231632

On SLES 9 SP3, running the OracleASM start/scandisks/stop commands

may panic the host after 20-30 iterations of the loop.

4.5.1 None.

230036

SCSI 3 PGR-based I/O fencing does not work on a PowerPath host in a VCS

cluster.

PowerPath 4.5.x does not work correctly with any application that uses

SCSI-3 persistent register/reserve/preempt commands. Refer to “Limitations”

on page 18.

4.5.0 None.

229447

VxVM 4.1 pseudo device mappings (emcpower mappings) may become

inconsistent with PowerPath pseudo device mappings. Circumstances that

may cause inconsistencies include:

• VxVM 4.1 is uninstalled and reinstalled after a LUN configuration change.

VxVM maps pseudo devices based on device information saved before

the uninstall, and these mappings may differ from the current PowerPath

mappings and configuration.

• A pseudo device instance is renamed using emcpadm, which causes

VxVM 4.1 to lose the pseudo device mapping.

4.5.0 To fix inconsistent device mappings:

1. Enter:

cp /etc/vx/disk.info

/etc/vx/disk.info.old

2. Enter:

echo >

/etc/vx/disk.info

3. Enter:

vxconfigd -k

227570

Uninstalling PowerPath does not remove the emcpower files from the

/dev directory.

4.4.1 Manually remove the files.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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