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Failback settings by operating system – HP 3000 Enterprise Virtual Array User Manual

Page 35

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Setting

Point in time

Behavior

At initial presentation

The units are brought online to Controller

A.

On dual boot or controller resynch

If cache data for a LUN exists on a

particular controller, the unit will be

brought online there. Otherwise, the

units are brought online to Controller A.

On controller failover

All LUNs are brought online to the

surviving controller.

Path A - Failover/

Failback

On controller failback

All LUNs remain on the surviving

controller. After controller restoration,

the units that are online to Controller

B and set to Path A are brought online

to Controller A. This is a one time

occurrence. If the host then moves the

LUN using SCSI commands, the LUN will

remain where moved.

At initial presentation

The units are brought online to Controller

B.

On dual boot or controller resynch

If cache data for a LUN exists on a

particular controller, the unit will be

brought online there. Otherwise, the

units are brought online to Controller B.

On controller failover

All LUNs are brought online to the

surviving controller.

Path B - Failover/

Failback

On controller failback

All LUNs remain on the surviving

controller. After controller restoration,

the units that are online to Controller

A and set to Path B are brought online

to Controller B. This is a one time

occurrence. If the host then moves the

LUN using SCSI commands, the LUN will

remain where moved.

Table 3 Failback Settings by Operating System

Operating system

Default behavior

Settings supported

Windows® Secure Path

Autoback done by the host

No Preference, Path A/B - Failover

Only.

Sun Solaris® Secure Path

Autoback done by the host

No Preference, Path A/B - Failover

Only.

HP-UX Secure Path

Autoback done by the host

No Preference, Path A/B - Failover

Only.

IBM AIX Secure Path

Autoback done by the host

No Preference, Path A/B - Failover

Only.

Tru64 UNIX

Host follows the unit

All settings allowed.

Recommended setting: Path

A/B - Failover/Failback.

VMS (7.3-1 and greater)

Host follows the unit

All settings allowed.

Recommended setting: Path

A/B - Failover/Failback.

Novell Netware Secure Path

Autoback done by the host

No Preference, Path A/B - Failover

Only.

Enterprise Virtual Array 3000/5000 user guide (VCS 3.110)

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