Hot swap up to four 35in sata hard drives in seconds this 4 bay sata mobile rack lets you swap between 35in serial ata sata sata ii and sata iii 6gbps hard drives in secondsa time saving storage solution the mobile rack offers four trayless sata hard drive bays allowing you to hot swap serial ata hard drives but avoid having to mount the drives to trays for deployment or unfasten them for replacementsupporting up to four hard drives the mobile sata hot swap rack only takes up three 5