|System Manager's Manual
vdev_id — generate
user-friendly names for JBOD disks
vdev_id is an udev helper which parses
vdev_id.conf(5) 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 remapped 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, 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.
- The device node to classify, like /dev/sda.
- Specifies the path to an alternate configuration file. The default is /etc/zfs/vdev_id.conf.
- Identifies a physical topology that governs how physical paths are mapped to channels:
- 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.
- Specifies the number of PHY devices associated with a SAS HBA port or SAS
vdev_idinternally uses this value to determine which HBA or switch port a device is connected to. The default is 4.
- Print a usage summary.
|May 26, 2021