Storage Devices
Video 1.06
Storage Devices
Hard Drives
Hard drives are comprised of platters
Read/Write heads for each platter
Read and write on top and bottom of platter
Never exposed to magnets
Data loss may occur
137 GB Limit
Hard Drive size limited to 137GB
Not a physical limit
Limited by address the system can support
28 bit communications limited to 268,435,555 addresses equates to 137 GB
Flash BIOS to upgrade hard drive interfaces
PATA, SATA, SCSI, USB, and FireWire most common is the PATA interface sometimes referred to as IDE or EIDE
IDE describes driver standard not the connector refers to hard drives, CD drives, DVD drives and tape drives now used interchangeably with PATA
PATA parallel ATA
IDE(PATA) cable has two connectors master and slave motherboard supports two cables primary and secondary four devices total primary master and primary slave secondary master and secondary slave motherboard connectors blue = primary channel black = secondary channel cable connectors blue = plugs to motherboard black = first device
Grey = secondary device master/slave designation not determined by position on cable determined by jumpers on drive check documentation or labels master, slave or cable select best – hard drive installation master on primary cable only device on cable
Other IDE devices on secondary cable
CD/DVD
2nd Hard drive
This improves performance
Pata Cables
40 pin to 40 wires
40pins to 80 wires
Extra wires = ground
40 pin connector
18in max length
ATA 100= 100 Mbps
ATA 133= 133 Mbps
Serial ATA
Serial ATA connector
Smaller than PATA
Faster than PATA
More expensive
One drive per cable
If motherboard supports SATA
Two or more SATA and two PATA
Total of six devices connected
Floppy Drives
Older technology
Largely replaced by
Flash drives
CD drives
DVD drives
3 ½ in disk- 1.44 MB data
Earlier 5 ¼ in disks
Each disk must be formatted
Creates tracks and sectors
Creates file allocation table
Storage Devices
Hard Drives
Hard drives are comprised of platters
Read/Write heads for each platter
Read and write on top and bottom of platter
Never exposed to magnets
Data loss may occur
137 GB Limit
Hard Drive size limited to 137GB
Not a physical limit
Limited by address the system can support
28 bit communications limited to 268,435,555 addresses equates to 137 GB
Flash BIOS to upgrade hard drive interfaces
PATA, SATA, SCSI, USB, and FireWire most common is the PATA interface sometimes referred to as IDE or EIDE
IDE describes driver standard not the connector refers to hard drives, CD drives, DVD drives and tape drives now used interchangeably with PATA
PATA parallel ATA
IDE(PATA) cable has two connectors master and slave motherboard supports two cables primary and secondary four devices total primary master and primary slave secondary master and secondary slave motherboard connectors blue = primary channel black = secondary channel cable connectors blue = plugs to motherboard black = first device
Grey = secondary device master/slave designation not determined by position on cable determined by jumpers on drive check documentation or labels master, slave or cable select best – hard drive installation master on primary cable only device on cable
Other IDE devices on secondary cable
CD/DVD
2nd Hard drive
This improves performance
Pata Cables
40 pin to 40 wires
40pins to 80 wires
Extra wires = ground
40 pin connector
18in max length
ATA 100= 100 Mbps
ATA 133= 133 Mbps
Serial ATA
Serial ATA connector
Smaller than PATA
Faster than PATA
More expensive
One drive per cable
If motherboard supports SATA
Two or more SATA and two PATA
Total of six devices connected
Floppy Drives
Older technology
Largely replaced by
Flash drives
CD drives
DVD drives
3 ½ in disk- 1.44 MB data
Earlier 5 ¼ in disks
Each disk must be formatted
Creates tracks and sectors
Creates file allocation table