SSD HSD storage drives

SSD HSD storage drives

1. Storage Drives HDD, SSHD and SSD -Parikshit Taksande

2. Index Introduction Types of storage drives Hard disk drive interfaces Basic components of a hard drive Difference between SSD and HDD

3. What is storage? Storage holds data, instructions, and information for future use. Storage medium is physical material used for storage.

4. Hard Disk Drive (HDD) Solid State Drive (SSD) Hybrid drive(SSHD) Storage Drives

5. Hard Disk Drive (HDD) A hard disk drive, hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that uses magnetic storage to store and retrieve digital data using one or more rigid rapidly rotating platters coated with magnetic material. Solid State Drive (SSD) In computing, a hybrid drive is a logical or physical storage device that combines a faster storage medium such as solid-state drive with a higher-capacity hard disk drive.  A solid-state drive is a solid-state storage device that uses integrated circuit assemblies to store data persistently. Hybrid drive(SSHD)

6. Hard Disk Drive Interfaces Parallel Advance Technology Attachment (PATA). Small Computer. System Interface (SCSI). Serial AT Attachment (SATA). Serial Attached SCSI (SAS).

7. Parallel advance technology attachment (PATA) It has a 40 pins data connector. It has 4 pins power connector. Data transfer rate is 133.3 mb/s. If you have two devices connected to one ide controller, one must be set master and the other must be set to slave using jumpers and ide cable. Max of two drives per controller. Developed by western digital under the name integrated drive electronics (ide).

8. Small computer system interface (SCSI) SCSI are high performance storage drives. SCSI drives are commonly found in servers were real time performance or 24/7 operation is required. It has 40 Pins Data Connector and 4 Pins Power connector. Data transfer rate is 320 MB/S for SCSI-3 Wide Ultra3. Max of 15/16 drives per controller.

9. Basic components of a hard drive Disk platters. Read/write heads. Spindle motor. Stepper motor. Logic board. Cables & connectors. Configuration items (such as jumpers &switches)

10. Hard Disk Platters 3 1/2 inch drives are the most popular for desktop & some portables. Max number of platters in a 3 1/2 inch drive is 11. Traditionally made from a magnetic material, in the flat disk part of the drive. The data stored in the platter. Designed for higher density has led to the use of platters made of glass (glass ceramic composite). Glass platters offer greater rigidity & mores table thermally.

11. Read/Write Heads A hard disk has one read/write head for each side of the platter. The heads are connected on a single movement mechanism. They move in same manner and direction. Each head is on an actuator arm that is spring-loaded to force the head into contact with a platter . The heads float only a very slight distance above the platter. When the drive is at rest, the heads are forced into direct contact with the platters by spring tension .

12. Solid state drive Hard disk drive Random access time 0.1 m/s Random access time 5 -10 M/S Read latency time very low Read latency time high High reliability Low reliability Ssds have no moving parts Hdds have moving parts Small and light in weight Relatively large and heavy In 2018 ssds were available in size up to 128 TB In 2020 hdds were available in size up to 40 TB Power consumption 2 watts Power consumption 12 watts Difference between SSD and HDD

13. Thanks You