In a dual-drive system, the manufacturer will install a small SSD primary drive (C:) for the operating system and apps, and add a larger spinning hard drive (D: or E:) for storing files. This works well in theory; in practice, manufacturers can go too small on the SSD.
EIDE's enhancements to Integrated Drive Electronics (IDE) make it possible to address a hard disk larger than 528 Mbytes. EIDE also provides faster access to the hard drive, support for Direct Memory Access , and support for additional drives, including CD-ROM and tape devices through the AT Attachment Packet Interface.
The dual arms used to record or read data from the 350 disk storage unit. With storage capacities of 5 million and 10 million digits, and the capability to be installed either singly or in pairs, the 350 provided the 305 system with storage capacities of 5, 10, 15 or 20 million characters.
The SATA interface has certain advantages. Most external hard-disk-drive cases with FireWire or USB interfaces use either PATA or SATA drives and "bridges" to translate between the drives' interfaces and the enclosures' external ports; this bridging incurs some inefficiency.
A source data disk is a diskette or disc that is the source of data in a copy or move operation. For example, when copying files from a hard disk drive to a floppy diskette, the source data drive would be the hard drive and the destination is the floppy diskette.