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https://qsupport.quantum.com/kb/flare/Content/stornext/SN6_DocSite/Guide_Installation/Topics/Linux_Device_Mapper_Mult.htm
The StorNext File System does not currently support disks managed through the Linux Device Mapper tools other than those which are managed through multipathd.Disk paths showing up under the /dev/mapper path that are not multipathd devices will not be usable by StorNext due to Device Mapper taking exclusive control of the disk devices. See the Linux dmsetup documentation for details.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/device_mapper
The Device Mapper provides the foundation for a number of higher-level technologies. In addition to LVM, Device-Mapper multipath and the dmraid command use the Device Mapper. The application interface to the Device Mapper is the ioctl system call. The user interface is the dmsetup command.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/udev_device_manager
In Red Hat Enterprise Linux 6, the Device Mapper provides direct support for udev integration. This synchronizes the Device Mapper with all udev processing related to Device Mapper devices, including LVM devices. The synchronization is needed since the rule application in the udev daemon is a form of parallel processing with the program that is the source of the device's changes (such as ...
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/snapshot.html
Device-mapper snapshot support¶ Device-mapper allows you, without massive data copying: To create snapshots of any block device i.e. mountable, saved states of the block device which are also writable without interfering with the original content; To create device “forks”, i.e. multiple different versions of the same data stream.
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/index.html
Linux support for random number generator in i8xx chipsets; Using the initial RAM disk (initrd) I/O statistics fields; Java(tm) Binary Kernel Support for Linux v1.03; IBM’s Journaled File System (JFS) for Linux; Reducing OS jitter due to per-cpu kthreads; ... Device Mapper ¶ Guidance for writing policies ...
https://www.suse.com/support/kb/doc/?id=7017390
device-mapper: remove ioctl on failed: Device or resource busy. This document ... Expanded Support. Support for common Linux platforms. SUSE Shop. Buy your subscription online. Support Resources Knowledgebase SUSE Customer Center Patches & Updates Driver Search Product Documentation Product Support Life Cycle Package Hub.
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