Best Answer: What Is Device Mapper Linux?
Contents the Device Mapper Is a Framework Provided by the Linux Kernel for Mapping Physical Block Devices onto Higher-Level Virtual Block Devices. It Forms the...
The device mapper is a framework provided by the Linux kernel for mapping physical block devices onto higher-level virtual block devices. It forms the foundation of the logical volume manager (LVM), software RAIDs and dm-crypt disk encryption, and offers additional features such as file system snapshots.
How do I find device mapper in Linux?
You can use the dmsetup command to find out which device mapper entries match the multipathed devices. The following command displays all the device mapper devices and their major and minor numbers. The minor numbers determine the name of the dm device.
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What is the purpose of multipathing?
Multipathing allows the combination of multiple physical connections between a server and a storage array into one virtual device. This can be done to provide a more resilient connection to your storage (a path going down will not hamper connectivity), or to aggregate storage bandwidth for improved performance.
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