- When multipath is activated in a Linux system, ALL disks in such system are grouped into multipath devices. For example, if sda is an individual disk while sdb and sdc are actually part of the same multipath, the system will contain two multipath block devices (one for sdb+sdc and another one for sda only). That's represented in the targetmap by the corresponding
CT_DMMULTIPATHelements. When using libstorage-ng, all those disks and multipath devices are also represented in the devicegraph.
- With AutoYaST, multipath is only activated if
start_multipathis true. The presence of a
CT_DMMULTIPATHdrive has no influence.
- Important: AutoYaST in SLE12-SPX will often select the disk with bios_id=0x80 for the first drive, no matter whether such drive is
CT_DMMULTIPATHand no matter whether the disk is part of a multipath device. See [this code](https://github.com/yast/yast-autoinstallation/blob/c01fe86f3d508c4b7d7be28bfd8d66541e1b1fa8/src/modules/AutoinstStorage.r