IBM 90P1309-RFB is a hot-swappable hard disk drive for server and storage systems. Its 73.4 GB capacity provides a place for data on systems using a compatible SCSI Ultra320 connection.
The drive has a 3.5-inch form factor, spins at 10,000 RPM and uses a SCSI Ultra320 LVD interface. Its 8 MB cache is specified alongside these core drive details. Hot swapping supports replacing the drive while the system is running, which can simplify maintenance in systems designed for that feature.