Understand the Multipath Command Output & its terminology
Block That Ghost!, January 1948 Radio-Craft - RF Cafe Dec 06, 2019 Ubuntu 10.04 & IBM DS3524 with FC multipath, inactive path OK, this is my setup: FC Switches IBM/Brocade, Switch1 and Switch2, independent fabrics. Server IBM x3650 M2, 2x QLogic QLE2460, 1 connected to each FC Switch. Storage IBM DS3524, 2x controllers Multipath Ghosts in Through‐the‐Wall Radar Imaging
`- 6:0:0:0 sdc 8:32 active ghost running. Alwas the same active ghost path. On a centOS the same issue, on debian/ubuntu also the same active ghost path. on every system I can format and mount the drive but no multipath on two controllers. What can I do to have -+- policy='round-robin 0' prio=1 status=active `- 6:0:0:0 sdc 8:32 active ready running
Sep 16, 2014
ghost: Path is a passive path. A standalone program that returns the priority for a path. multipath/multipathd invokes this callout and uses the priority value of
Specifies whether MPIO performs custom path recovery. Type is boolean and must be filled with either 0 (disable) or 1 (enable). By default, it is disabled. NewPathRecoveryInterval. 40: 20: Specifies a custom path recovery time, in seconds. This is the length of time before the server attempts path recovery. The default value is 40. Apr 26, 2020 · Device Mapper Multipathing - Configuration Device Mapper Multipath will be referred here as multipath only. Before moving on with this session it is recommended that you read: 1. Device Mapper Multipathing - Introduction Multipath is usually able to work out-of-the-box with most common storages. This doesn’t mean the default configuration variables should be used in production: they don’t DM-Multipath creates a single device with a unique WWID that reroutes I/O to those four underlying devices according to the multipath configuration. So when there is a failure with any of this I/O paths, Data can be accessible using the available I/O Path. 1. Install the Device Mapper Multipath package. The multipathd daemon is in charge of checking for failed paths. When this happens, it will reconfigure the multipath map the path belongs to, so that this map regains its maximum performance and redundancy.