The lsdev utility provides a map of your array LUNs to their Linux block devices. Caution – You might lose access to the storage array if you change these settings from their configured values. Place the download in a non-volatile location on the system to be installed. The default values listed here are the platform-independent settings. Are you new to LinuxQuestions. Click Here to receive this Complete Guide absolutely free.

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Re: [dm-devel] Multipath setup and rdac questions

After you change a configuration value, you must run rdacc mppUpdate utility and reboot your Linux server for the lunux to take effect. Your kernel version is 2. Unpack the source code using the tar command:. Depending on the error and the amount of time that has elapsed, the request is retried to the current owning controller for the LUN or a failover is performed and the request sent to the alternate controller. If you’d like to contribute content, let us know.

Not Ready linjx time exceeded. If no other path exists, a failover takes place. The following values are possible:. If another path does not exist, a failover takes place. In most of the cases, no change is required if the kernel version is the same.


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This process is known as a “Wait Time. The total number of paths to the storage array is the MaxPathsPerController value multiplied by the number of controllers. Lihux you change a configuration value, run the mppUpdate utility and reboot the Linux server for the change to take effect. The interval, in seconds, during which the failover driver will check for these conditions:.

Before you install the RDAC driver, be sure the following requirements are llinux. Busy wait time exceeded on failover command. For the Linux OS, change the following file to add the storage array user label and its virtual target ID. The HBAs connected to a single storage array are the same model. To create a new initrd image, edac the following command and press Enter. The host numbers assigned by the Linux middle layer start from 0. The following values are possible: The new boot menu entry should look something like this note that it may vary with different system configuration: A description of each parameter follows.


If a rdsc returns an error and the failover driver decides to retry the request, the current time is compared with the original timestamp information.

Migrating the MPP/RDAC driver to the Linux DM-MP driver

The relevant stanza for the V was given to me by the suppliers. Failover failed, unable to allocate memory.

CAM does not generate an alarm because no internal problems exist for the array. I’m at home now it’s The mppUtil utility is a cross-platform tool.

Prints the version of the RDAC driver currently running on the system. Load the standard HBA non-failover driver. All times are GMT