IBM V7000 SUBSYSTEM DEVICE DRIVER

For more information, contact the IBM Support team. Adapter The name of the adapter to which the path is attached. For Open HyperSwap devices, when the device is open, an attempt to set the last active path of the source volume offline by issuing the pcmpath set adapter command will be rejected. If the commands are used for adapter, the n is the index of the adapter. Views Read Edit View history. Select Software Maintenance and Utilities and press Enter. If the SAN boot devices are configured with the default reserve policy and path selection algorithm, you must not configure these SAN boot devices on other AIX servers.

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With the SDD automatic path-failover feature, some reported errors are actually recovered from an alternative path.

Otherwise, the devices can be in the Defined state and cannot be configured as either MPIO or non-mpio devices. To use the load-balancing and failover features, SDDPCM requires a minimum of two independent paths that share the same logical unit.

Examples If you enter the pcmpath set device 5 path 0 offline command, path 0 for device 5 changes to Offline mode.

System high availability

To disable the health check function of a device, set interval time to 0. The maximum number of queued sectors to Read or Write 1. The file version and copyright information about the sdddsm. If all retries fail on the preferred controller's paths, paths on the alternate controller will be selected for retry. If the shared disks consist of multiple enclosures, use one disk in each enclosure as a heartbeat path.

IBM SAN Volume Controller - Wikipedia

Do not shut down the host or reconfigure the SDD during the concurrent download of licensed machine code or you might lose your initial SDD configuration.

If none of the supported storage devices are configured successfully as MPIO devices, the pcmpath query device command will fail.

Subsysten is particularly true if the concurrent firmware download has taken place. The health check does not recover paths that are failed by the Distributed Error Detection algorithm. Subsystem device driver device specific module sdddsm. Syntax pcmpath query adapter adapter number aa ap Parameters adapter number The index number of the adapter for which you want information displayed.

The MC Service Guard cluster must be halted prior to upgrade.

MPIO and SDDDSM dynamic pathing: Storwize V

If you issue the pcmpath set device M path N offline command to a DS or a DS device and the path to be set offline is the last active path, it causes the device to fail over to the alternate controller. With a single path, failover protection is not available. The same vpathname, vpathn, will be assigned to the same LUN when it is reconnected to the host. Select the bit or bit folder depending on the operating system of the host system.

Use this command to dynamically turn on or turn off health check recovery of Distributed Error Detection DED failed paths.

Before adding any new hardware, review the configuration information for the adapters and devices currently on your Windows ServerWindows Serveror Windows Server server.

Any limitation exists on the host operating system. Beginning with SDDvp2hd is not invoked at the system shutdown.

IBM SAN Volume Controller

A path that ihm failed due to timeout policy can later be recovered by the AIX health check commands. By using this product, you agree to abide by the terms of this agreement and applicable copyright laws. Enter the following command to re-create the physical volume: This command removes an existing registration and persistent reserve from another host.

To enable dynamic tracking, you must do the following: The following examples demonstrate the possible configurations in which this algorithm can help to improve performance. When you use sdddsm for multipathing, you must use a supported driver for an emulex hba and for a qlogic hba. When the controller health check is enabled, the first controller health check is issued after a storage fabric transport failure is detected.

If you do not enter a target port number, information about all target ports is displayed. If you specify no to Commit Software Updates?

The fibre-channel device drivers include the following installation packages: