SYM(4) Device Drivers Manual SYM(4)

sym — symmetric access SCSI devices

sym* at scsibus?

The sym driver attaches to SCSI logical units that support symmetric access, i.e. all paths to the device are as good as each other. Each path attached to by sym is presented to mpath(4) which uses it as a backend to the logical unit attached to its own scsibus(4).

ioctl(2), intro(4), mpath(4), scsi(4)

The sym driver first appeared in OpenBSD 5.0.

David Gwynne <dlg@openbsd.org>.

OpenBSD 7.8 July 16, 2013 SYM(4)