The best replacement for scsi is sata.

The best alternatives to scsi are rated as following:
★★★★★  sata
★★★★  ide
★★★  sas
★★  ssd
★★  usb
★  raid
★  iscsi
★  ata
★  sata vmware
★  dt virtual drive
★  fibre channel
  eide
  sata faster
  sata speed
  sata hard drive
  firewire
  dt
  ide vmware
  ide hyper-v
  fc
  sata drives
  sata 3
  parallel
  sata ii
  ide hard disks
  sata raid
  raptor
  sata raid 5
  esata
  serial ata
  sata performance
  sas drives
  fiber channel
  usb 2.0 speed
  scsi-2
  sata 2
  sata2

Your alternative for scsi is not listed? Suggest!
Speaking about scsi, one probably shouldn't forget about ide.

Other search terms related to scsi and their ratings are:
★★★★★ ide
★★★ 10k scsi
★★ other variations of scsi
You have in mind a companion for scsi and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of scsi in all years. Click on graph for more.
scsi
sata
ide