Dell PowerVault MD3200i Owner's Manual - Page 183

NOTE: To ensure data integrity protection, reboot a Linux host server attached to an MD3200i Series storage array using the procedure given below. Linux Host Server Reboot Best Practices Its is recommended that you follow the procedures shown below when rebooting your Linux host server using Device Mapper multipathing with an MD3200i Series storage array. 1 Unmount all Device Mapper multipath device nodes mounted on the server # umount 2 Stop the Device Mapper multipath service # /etc/init.d/multipathd stop 3 Flush the Device Mapper multipath maps list to remove any old or modified mappings # multipath -F NOTE: The boot operating system drive may have an entry with the Device Mapper multipathing table. This is not affected by the multipath -F command. However, using #multipath -ll should not show any multipathing devices with model "MD3200i" or "MD3200i". 4 Log out of all iSCSI sessions from the host server to the storage array # iscsiadm -m node --logout Important Information About Special Partitions When using Device Mapper with the MD3200i Series array, all physical disks are assigned a disk device node. This includes a special device type used for in-band management of the MD3200i Series array, known as the Access Disk or Universal Xport device. CAUTION: Certain commands, such as lsscsi, displays one or more instances of Universal Xport devices. These device nodes must never be accessed, mounted, or used in any way. Doing so could cause loss of communication to the storage array and possibly cause serious damage to the storage array, potential making data stored on the array inaccessible. Configuration: Device Mapper Multipath for Linux 183