Iomega REV 35GB/90GB SCSI Internal Drive with Disk. Hard drive capacity: 35 GB, Write seek: 13 ms, Read seek: 12 ms. Weight: 625 g. Operating temperature range (T-T): 0 - 45 °C, Operating relative humidity range: 8 - 90 %. Bundled software: Iomega REV System Software, Iomega Automatic Backup Pro 3.0, Yosemite TapeWare f REV.. Minimum hard disk space: 100 MB, Minimum processor: Pentium II 333 MHz, Minimum RAM: 128 MB