Red Hat ENTERPRISE LINUX 4.5.0 - Instrukcja Użytkownika Pobierz pdf (Strona 17)

EMC PowerPath for Linux Version 4.5 and Point Releases Release Notes

Known Problems and Limitations

227536

Certain SCSI-based IOCTLs (for example, SCSI_GET_IDLUN) and

applications that use these IOCTLs (for example, sg_map) may not work

correctly for devices on active-active arrays (Symmetrix, for example) set to

the bf (Basic Failover) policy. In such instances, you may see the following

errors:

device /dev/sdp failed on scsi ioctl(idlun), skip:

No such device or address

device /dev/sdr failed on scsi ioctl(idlun), skip:

No such device or address

4.5.0 Use the powermt set policy

command to change the policy to so

(Symmetrix Optimized) for Symmetrix

devices or to ad (Adaptive) for other

active-active devices. Rerun the

application.

226467

Starting PowerPath on a SLES 9 host with a qla4xxx iSCSI driver may

generate the following message:

qla4xxx: invalid ioctl magic number received.

4.5.0 Ignore the message.

226387

PowerPath uninstallation may fail on a host where I/O had been running for an

extended period.

4.5.0 Refer to EMC KnowledgeBase

solution emc123149 for more

information.

225724

Running the powermt remove command to remove a PowerPath pseudo

device causes a trespass if I/O is inflight to the pseudo device and the last

path of that pseudo is a passive.

4.5.0 None.

224770

Uninstalling PowerPath can fail in any of the following scenarios:

• When a dump device is configured on an array native device (for example

/dev/sdx, where sdx is a Symmetrix, CLARiiON, or third-party array

device).

• Any device that is opened before or after PowerPath is loaded.

4.5.0 • Remove the dump device or

reconfigure it to point to an internal

disk.

• Close the open device.

223760

Repeatedly using parted to create and delete partitions causes the host to

run out of memory.

4.5.0 None.

223441: If you stop PowerPath and the device configuration changes when

you restart PowerPath, you may see a message that PowerPath failed to start.

4.5.0 Ignore the message. PowerPath

restarts successfully despite the

message.

218291: In RHEL4 U2, the existing parted version

(parted-1.6.19-1.EL) does not work correctly on pseudo devices.

4.5.0 • Use the fdisk utility instead of

parted to create partitions

using pseudo devices.

• Upgrade to parted version

parted-1.6.21 series or later.

Table 1-7 Known Problems in PowerPath (continued)

Description

Found in

Version Workaround

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 27 28

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