A group of SCSI peripherals daisy chained together. The cable goes from the host adapter into device #1, then from #1 to #2 and so on. See SCSI.
"SCSI chain." YourDictionary, n.d. Web. 13 June 2018. <http://www.yourdictionary.com/scsi-chain>.
SCSI chain. (n.d.). Retrieved June 13th, 2018, from http://www.yourdictionary.com/scsi-chain