Solid State Drive – SSD
There are many kind of SSD. SSD is updated of HDD (Hard Drive Disk). SSD is x8 faster then HDD and I have share some information about solid state Drives.
A SSD(Solid State Drive) is the storage device. In SSD used integrated circuit assemblies to store data in memory persistently typically using flash memory and functioning as secondary storage of personal computer storages or computer storages. Even though SSDs (Solid State Drives) lack the physical spinning disks or movable read/write heads used in hard disk drives (HDDs) and floppy disks. It is called a solid-state device or a solid-state drive.
The host interface or circuits is physically a connector with the signalling managed by the SSD’s controllers. It is the most often one of the interfaces found in Hard Disk Drive.
Comparing SSDs and HDDs
HDDs are a legacy storage technology that use spinning disks to read-write data’s. Solid State Drives are faster and more power efficient than HDDs. HDDs are price low but SSD prices are dropping.
They include in SSD:
- Serial attached SCSI (SAS-3, 12.0Gbit/s) generally found on servers Connector
- Serial ATA and mSATA variant (SATA 3.0, 6.0Gbit/s) Port
- PCI Express (PCIe 3.0 ×4, 31.5Gbit/s) Port
- 2 (6.0Gbit/s for SATA 3.0 logical device interface 31.5Gbit/s for PCIe 3.0 ×4) Port
- 2 (PCIe 3.0 ×4) Port
- Fibre Channel (128Gbit/s) almost exclusively found on servers Connector
- USB (10Gbit/s) Port
- Parallel ATA (UDMA, 1064Mbit/s) mostly replace by SATA Port
- (Parallel) SCSI ( 40Mbit/s – 2560Mbit/s) Port generally found on servers, mostly replaced by SAS. Last SCSI-based SSD was introduced in 2004
SSDs support are various logical devices interfaces. Such as AHCI (Advanced Host Controller Interface) and NVMe. Logical device interface define the command sets useing by operating systems to communicate with SSDs and host bus adapters (HBAs).