SSDs and HDDs

Difference Between SSDs and HDDs

SSDs and HDDs

Let’s compare SSDs and HDDs to help you decide.

If you bought an ultraportable laptop in the previous several years; it probably came with an SSD. Bulkier gaming laptops have switched to SSD boot drives; while only a minority of cheap machines use HDDs. Except for the cheapest variants; prebuilt desktop boot discs are typically SSDs. In some desktops; the SSD is the boot disc and the HDD is a larger storage supplement.

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A computer’s non-volatile storage is a spinning hard drive. Unlike RAM; its data doesn’t “go away” when you switch off the system. A hard drive is a metal disc with a magnetic covering that keeps your data, such as weather reports or digital music. Read/write heads on arms access data while platters spin.
An SSD performs the same basic function as a hard drive, except data is stored on interconnected flash-memory chips. These “NAND” flash chips are faster and more dependable than USB thumb drives. SSDs are more expensive than comparable USB flash devices.

SSDs are smaller than HDDs and allow PC manufacturers more design flexibility. Some types can be inserted in 2.5-inch or 3.5-inch hard drive bays, while others can be installed in a PCI Express expansion slot or directly on the motherboard.

Why do laptops need SSDs?

Non-mechanical SSDs are used in laptops. Solid-state drives use less power, extending battery life. Lower-priced laptops still have traditional hard drives, but most high-end computers use SSDs.

Solid state drives are shock-resistant, unlike hard disks. Dropping a laptop while the read/write head is moving could cause data loss. SSDs avoid this.

But not usually. “Hybrid” computers include both drive types – the OS, programs, and most-used files are on an SSD, while other data is on a bigger, less expensive HDD. Using your SSD to run OS and apps boosts SSD performance.

SSDs and HDDs pros/cons

SSDs are the norm in mainstream systems and high-end computers like the Apple MacBook Pro, which has no hard disc option. Desktops still have HDDs.

Both SSDs and hard drives boot and store your apps and files. Each storage type has unique characteristics. Why choose one over the other?

SSDs cheaper than HDDs

SSDs outperform HDDs. Therefore, SSDs’ reliability is well-known. SSDs don’t need replication for performance, and they need less replication for reliability. SSD performance allows for more efficient data-reduction than HDDs. A 50% ratio of host data stored to physical storage required is a 2:1 data-reduction ratio. Effective capacity is enhanced because data reduction allows users to store more data than on the actual hardware. Compression and deduplication reduce the raw storage capacity needed for “usable capacity.”

Modern techniques improve SSDs to offer a high data-reduction ratio (DRR) and great application performance. Facebook’s Zstandard compression algorithm compresses and decompresses substantially quicker than HDDs, allowing real-time use on SSDs. 2 VMware vSAN only offers compression and deduplication in all-flash deployments.

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