NAME

SYNOPSIS

DESCRIPTION

The currently supported topologies are sas_direct, sas_switch, and scsi. A multipath mode is supported in which dm-mpath devices are handled by examining the first running component disk as reported by the driver. In multipath mode the configuration file should contain a channel definition with the same name for each path to a given enclosure.

vdev_id also supports creating aliases based on existing udev links in the /dev hierarchy using the alias configuration file keyword. See vdev_id.conf(5) for details.

OPTIONS

-d device

The device node to classify, like /dev/sda.

-c config_file

Specifies the path to an alternate configuration file. The default is /etc/zfs/vdev_id.conf.

-g sas_direct|sas_switch|scsi

Identifies a physical topology that governs how physical paths are mapped to channels:

sas_direct and scsi

channels are uniquely identified by a PCI slot and HBA port number

sas_switch

channels are uniquely identified by a SAS switch port number

-m

Only handle dm-multipath devices. If specified, examine the first running component disk of a dm-multipath device as provided by the driver to determine the physical path.

-p phys_per_port

Specifies the number of PHY devices associated with a SAS HBA port or SAS switch port. vdev_id internally uses this value to determine which HBA or switch port a device is connected to. The default is 4.

-h

Print a usage summary.

SEE ALSO