7 Important Differences Between SSD and HDD


Let’s compare the two industry-leading data storage space devices.

For years there seemed to be only one efficient path to keep data on a PC – with a hard drive (HDD). Having said that, this sort of technology is already showing it’s age – hard disks are loud and slow; they can be power-ravenous and have a tendency to generate a lot of warmth in the course of intensive operations.

SSD drives, alternatively, are fast, use up far less energy and tend to be far less hot. They offer a completely new approach to file access and data storage and are years ahead of HDDs relating to file read/write speed, I/O operation and also power efficacy. Find out how HDDs fare against the newer SSD drives.

1. Access Time

SSD drives present a completely new & revolutionary approach to file safe-keeping based on the usage of electronic interfaces in place of just about any moving components and spinning disks. This brand new technology is much quicker, enabling a 0.1 millisecond data access time.

HDD drives make use of spinning disks for files storage purposes. Each time a file is being accessed, you will need to wait around for the right disk to get to the right position for the laser to view the file involved. This ends in a standard access rate of 5 to 8 milliseconds.

2. Random I/O Performance

The random I/O performance is vital for the operation of any data file storage device. We have run thorough assessments and have identified an SSD can deal with no less than 6000 IO’s per second.

Having an HDD drive, the I/O performance steadily improves the more you employ the disk drive. Nonetheless, in the past it extends to a specific cap, it can’t get quicker. And due to the now-old technology, that I/O limitation is much below what you can find with a SSD. HDD are only able to go as far as 400 IO’s per second.

3. Reliability

SSD drives are built to have as less rotating parts as possible. They utilize a similar technology like the one used in flash drives and are significantly more reliable rather than regular HDD drives. SSDs provide an common failure rate of 0.5%.

To have an HDD drive to operate, it must rotate a couple metal hard disks at a minimum of 7200 rpm, keeping them magnetically stable in the air. There is a great number of moving components, motors, magnets along with other gadgets jammed in a tiny space. Consequently it’s no wonder that the average rate of failing of an HDD drive can vary among 2% and 5%.

4. Energy Conservation

SSD drives operate nearly noiselessly; they don’t generate surplus warmth; they don’t demand extra cooling alternatives and also consume less energy. Lab tests have demonstrated that the typical electrical power use of an SSD drive is somewhere between 2 and 5 watts.

From the minute they were created, HDDs have always been very electricity-heavy systems. So when you’ve got a server with lots of HDD drives, it will boost the regular electricity bill. Normally, HDDs use up in between 6 and 15 watts.

5. CPU Power

The quicker the data access rate is, the sooner the file demands will likely be handled. As a result the CPU do not need to hold resources waiting around for the SSD to answer back. The standard I/O wait for SSD drives is only 1%.

By using an HDD, you will need to devote extra time looking forward to the outcomes of one’s data file call. Because of this the CPU will be idle for further time, waiting around for the HDD to react. The typical I/O wait for HDD drives is approximately 7%.

6. I/O Request Times

In the real world, SSDs function as admirably as they did throughout the checks. We produced a full system backup on one of our production servers. Over the backup procedure, the common service time for I/O queries was indeed under 20 ms.

Weighed against SSD drives, HDDs deliver noticeably slower service rates for input/output demands. In a server backup, the regular service time for an I/O query ranges somewhere between 400 and 500 ms.

7. Backup Rates

You’ll be able to check out the real-world benefits of using SSD drives each and every day. For example, with a hosting server furnished with SSD drives, a full data backup is going to take merely 6 hours.

Over time, we’ve utilized primarily HDD drives on our web servers and we are well aware of their effectiveness. With a server loaded with HDD drives, an entire hosting server backup may take around 20 to 24 hours.

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