Testing of the IBM zSeries device with multipathing has shown that the dev_loss_tmo parameter should be set to 90 seconds, and the fast_io_fail_tmo parameter should be set to 5 seconds.
This ensures that the symbolic links in the /dev/disk/by-id path persistently point to the same device regardless of whether multipath is started or not.I can't figure this out, but I'd like to use 6 or 8 TB drives because I want to future ability to be able to expand this to several hundred TBs in ONE raid6. .Adding a Multipath Device Filter in the /etc/lvm/nf File By default, LVM2 does not recognize multipathed devices.Therefore, the device entry in /etc/nf file should be set as follows to ensure that only device mapper names are scanned after multipathing is configured: device If you are using user-friendly names or multipath aliases, specify the path as follows: device /dev/disk/by-id/dm-name-.*.2.6 Using Multipath. The enclosure has two arrays setup.Are these commands 'missing' from this rev of firmware and if so is there an alternative method for recreating a self-signed certificate on the array?Recommended action: Refer to 'Troubleshooting Steps for Leftover Drives' in the HP MSA2000/P2000 Guided Troubleshooting Best Practices." Other disk is failed with excessive medium error.The device must be re-initialized, which usually requires a reboot.Share, i have a p2000 2024fc. I think when the first volume was set it it should not have been mapped to all four ports but.Therefore, the Device Mapper Multipath service has hooks for hardware handlers.7.2.11 Supported Storage Arrays for Multipathing The multipathing drivers and tools support most storage arrays.types "device-mapper 253 Save the file.One spec sheet says the StorageWorks MSA60 game onet chen program study SAS/sata 418408-B21 can only use 1 TB drives in each slot, another site says it can do 2 TB drives so the 12 ports x 2 TB drives make the maximum capacity of the storage bay.This triggers udevd to fill in the /dev/disk/by-* symlinks.HP 3PAR Storage Systems for VMware.The storage array that houses the multipathed device must support multipathing in order to use the multipathing drivers and tools.Virtualization Environments, when using multipathing in a virtualization environment, the multipathing is controlled in the host server environment.If LVM starts before mpio maps are done, LVM might use a fixed path for the device instead of its multipath.We strongly recommend that you set the dev_loss_tmo value to be equal to or higher than the no_path_retry setting from multipath.Also on Server 1 and Server 2 which each server has 2 ports.