Array-based solid-state drives (SSDs) are manufactured in a variety of lengths (form factors) that can be installed in any storage device.
A solid-state array (SSA) is a dedicated all flash storage array. It has its own proprietary data management application and operating system (OS). Samsung 970 Pro NVMe M.2 SSD is among the fastest consumer SSDs. It provides sequential write and read speeds of up to 2700Mbps and up to 3500Mbps, respectively. Samsung V-NAND has a 2-bit MLC flash memory.
NVMe protocol will surely improve in the future. Hence, for best speeds, PCIe-based SSDs are the top choice. Intel Optane memory offers an extremely fast SSD. If you put a card in a four-lane slot, you get four times the bandwidth, at nearly 4Gbps. This makes it fast as compared to a Serial Advanced Technology Attachment (SATA)-based SSD. NVMe is a replacement for AHCI protocol, used in most SATA-based SSDs today.
Common interfaces
The most common SSA interfaces are SATA, Serial Attached SCSI (SAS), Fibre Channel (FC) and Peripheral Component Interconnect (PCI). These are available in various form factors, including 4.6cm (1.8-inch), 6.3cm (2.5-inch) and 8.9cm (3.5-inch).
SATA interface provides different data throughputs from 1Gbps to 6Gbps, based on the version. PCI Express and SATA interfaces are widely used in most SSDs.
PCI Express interface uses point-topoint architecture to provide high-speed serial expansion card formats, which is the same for graphic cards. PCI-based SSDs provide both data and power connections when plugged into the motherboard. These allow more bandwidth through multiple lanes and faster signaling. PCI is more efficient and, thus, results in high latency because of direct connection to peripherals.
Automated storage approach
This story is from the June 2018 edition of Electronics For You.
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This story is from the June 2018 edition of Electronics For You.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 8,500+ magazines and newspapers.
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