The IBM ST3006-031 is a 36.4 GB Ultra 320 SCSI hard drive designed for use in desktop computers. With a high rotation speed of 15,000 RPM and a data transfer rate of 550 Mbps, this drive offers fast and efficient performance. It features a hot swap capability, making it easy to install and remove without disrupting the system. The drive is manufactured by IBM and is part of the Seagate Cheetah X15 36LP product line. With a cache size of 8 MB and a form factor of 3.5 inches, this HDD is a reliable storage solution for various computing needs.