If you look back far enough, it wasn’t infiniband but a small separate fibrechannel fabric, and further back again I recall buying specialist dual-ported SCSI d

If you look back far enough, it wasn’t infiniband but a small separate fibrechannel fabric, and further back again I recall buying specialist dual-ported SCSI drives that were marketed primarily for cluster i.e. quorum-disk purposes. More than one goat was required to make these configurations work. (I seem to recall that many SAS drives now are dual-ported but designed as such to fulfil a desire for multi-path resiliency within storage arrays; this may have different characteristics to those needed of a quorum device)