A+ Storage

Class Notes:

Filesystems and OS

• Max size of partitions
• Block size and efficiency

Interfaces

• IDE – 133 MBps – 2 drives per controller
• SATA – 600MBps – 1 drive per controller
• SCSI – 640MBps – 16 driver per controller
• PCIe – 32 GBps – 1 Drive per controller
• M.2 – 2GBps – 1 Drive per controller

RAID

• Multiple physical drives into a single logical drive

Platter Drives

• RPM’s
• 5400, 7200, 10K, 15K SCSI
• Cheap, slow, Large, physical failure issues

SSD

• M.2
• SATA
• FAST
• Cool
• No moving parts
• Consumable

Tape

• VERY SLOW
• Permanent storage

Optical

• CD/ DVD/ Blueray
• Not User friendly
• Outdated

USB Drive

• Portable
• Slow
• USB 1, 2, 3

Micro SD

• Very small in size
• Getting big

NAS and SAN

• NAS – Network Attached Storage – Single Server
• SAN – Storage Area Network – Multiple storage servers combined into a logical storage resource
• Storage Protocols such as iSCSI

Cloud Storage

• Synchronization between device cloud, and other devices

Final Thoughts

• Storage is many times the system Bottleneck