Section: Maintenance Commands (8)
- SEE ALSO
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vdev_id - generate user-friendly names for JBOD disks
vdev_id <-d dev> [-c config_file] [-g sas_direct|sas_switch]
[-m] [-p phys_per_port]
The vdev_id command is a udev helper which parses the file
to map a physical path in a storage topology to a channel name. The
channel name is combined with a disk enclosure slot number to create an
alias that reflects the physical location of the drive. This is
particularly helpful when it comes to tasks like replacing failed
drives. Slot numbers may also be re-mapped in case the default
numbering is unsatisfactory. The drive aliases will be created as
symbolic links in /dev/disk/by-vdev.
The currently supported topologies are sas_direct and sas_switch. A
multipath mode is supported in which dm-mpath devices are handled by
examining the first-listed running component disk as reported by the
command. In multipath mode the configuration file should contain a
channel definition with the same name for each path to a given
also supports creating aliases based on existing udev links in the /dev
hierarchy using the alias configuration file keyword. See the
man page for details.
- -c <config_file>
Specifies the path to an alternate configuration file. The default is
- -d <device>
This is the only mandatory argument. Specifies the name of a device
in /dev, i.e. "sda".
- -g <sas_direct|sas_switch>
Identifies a physical topology that governs how physical paths are
mapped to channels.
sas_direct - in this mode a channel is uniquely identified by
a PCI slot and a HBA port number
sas_switch - in this mode a channel is uniquely identified by
a SAS switch port number
will handle only dm-multipath devices. If set to "yes" then
will examine the first running component disk of a dm-multipath
device as listed by the
command to determine the physical path.
- -p <phys_per_port>
Specifies the number of PHY devices associated with a SAS HBA port or SAS
internally uses this value to determine which HBA or switch port a
device is connected to. The default is 4.
Print a usage summary.