Those appear to be SAS (Serial Attached SCSI) drives, meant to go into an InforTrend SAN storage device. They will not work on a standard desktop or NAS with SATA.

That particular drive appears to be manufactured by Hitachi.

Odds are, the drive carries the InforTrend brand, due to it having specific firmware for InforTrend SAN devices. DEC/Compaq/HP does the same thing as do other SAN vendors. They buy drives from different manufacturers, making small tweaks to the firmware to ensure RAID compatibility. Usually this is to equalize drive size down to the byte space available between various vendors. Would be a bad situation if a replacement 250GB (249,999,999,999 byte) drive from Vendor B was too small compared to the existing 250GB (250,000,000,000 byte) drives in production from Vendor A.