A hybrid hard drive is neither fish nor fowl. What is an SSHD drive Hybrid hdd ssd sshd
Well, it's time to sum up. The Laptop Thin SSHD line didn't show anything special. Using a spindle rotating at 5400 rpm significantly reduced the speed of the drive. The drive demonstrates good results when reading and writing sequentially, although they are far from even budget SSD models. But with random reading/writing, as well as working with small files, the SSHD from Seagate literally fails.
In my opinion, SSHD TOSHIBA look much more interesting. The presence of a Marvell controller makes itself felt. Random read/write, small data - in these conditions, both MQ01AF050H and MQ01ABD100H demonstrate excellent performance. Yes, the 1000 GB model (depending on the reseller) is 500-1000 rubles more expensive than the ST1000LM014, but it’s worth it. I think so.
Another interesting model is Seagate ST2000DX001. The drive demonstrated impressive speed capabilities for sequential reading and writing. Although working with random data, as well as small files, in comparison with the same SSHD TOSHIBA leaves much to be desired. However, if you need a large storage drive, but there is no way to install an SSD in your desktop, then the ST2000DX001 will be a good choice.
The Seagate ST4000DX001 model is, for obvious reasons, inferior to the ST2000DX001, and is also quite expensive.
To summarize, I would like to note the following:
- Hybrid solid-state hard drives have every right to exist: despite the fact that they are more or less comparable in price to classic HDDs, this type of device really speeds up the system. Of course, you shouldn’t expect the speed and efficiency of an SSD from an SSHD, but the most frequently used programs will run faster;
- Still, nowadays volume decides a lot. There is a category of users (far from small, I must admit) who are not satisfied with 120-256 GB as a disk subsystem implemented in the form of an SSD. The realities of the market are such that a 1000 GB solid-state drive will cost the user, at best, 17-18 thousand rubles, and an SSHD costs between 3000-5000 rubles. And this is a strong argument in favor of hybrid hard drives.
In this article I will tell you what a hybrid hard drive is, why it is better than the usual HDD, as well as the pros and cons compared to an SSD.
For most ordinary users, I will now reveal a big secret - the weakest (read: slow) link in the chain of a computer system is the hard drive or hard drive. You may have the fastest processor, the best video card and a ton of RAM, but a slow and, excuse the expression, “dumb” hard drive nullifies all the work of this cool hardware.
This was the case until recently. Now there are SSDs or solid state drives. They helped get rid of this bottleneck in computer performance. Many people use them as the main boot disk for the operating system, which is very justified, but the high price and small amount of memory do not make it possible to use them more widely.
The production of hard drives is a very complex technological process, since there are many moving parts in it, which greatly limits the reduction in the size of the devices without losing certain characteristics (which is probably why so many modern hard drives now fail). Manufacturers find themselves at a technological impasse. There is no room to further increase the capacity of disks and their density.
To solve this problem, solid-state drives were created, and in 2007, Seagate developed the world's first hybrid hard drive or SSHD (solid-state hard drive). This is a physical data storage device in which data storage technologies of the 60s (hard disk on magnetic disks, HDD) and modern times (SSD drives on) are intertwined.
In general, this looks like an ordinary hard drive with significantly increased flash memory. The first samples had 128MB, but now there are models with 32GB.
The result is a very interesting and practical product. It inherited a large capacity from a regular disk, and a large, one might even say huge, data cache from a solid-state drive.
Speed parameters or HDD and SSD vs SSHD
The process of increasing the speed of the operating system and applications using such hybrid drives is as follows:
After installing the operating system on a hybrid hard drive, the first boot will occur at normal speed, but after several reboots, the time will decrease due to the device's microcontroller entering the most frequently used operating system data areas into a large cache. Tests have shown that booting a system with an SSHD is only 5-10% slower than a regular SSD. The same will happen with various applications, games, etc. The main thing is that the disk has enough flash memory for everything you need.
In late 2011 and early 2012, speed tests showed that hybrid SSDs with a 750 GB HDD and 8 GB cache were slower than SSDs in random read/write and sequential read/write, but faster than HDDs when running applications. and turning off.
The amount of cache memory significantly affects the cost of the final product. Therefore, when choosing a drive, you must take into account how resource-intensive applications you are going to run on it and their number.
At the heart of hybrid drive technology is deciding which data elements are prioritized by flash memory and which are not. Therefore, SSHDs can operate in two main modes:
Automatic mode or self-optimized
In this mode, the hybrid hard drive independently makes all decisions related to data distribution and does not depend on the operating system.
Host-Optimized Mode or host-hinted
In this operating mode, the Hybrid SSHD enables the extended SATA "Hybrid Information" command set. Based on these commands, the operating system and device driver, taking into account the file system structure, decide which data elements to place in the NAND flash memory.
Some specific features of SSHD, such as host-hinted mode, require software support in the operating system. Support for host-hinted operations appeared only in Windows 8.1, while patches for the Linux kernel have been available since late 2014. They are expected to be included in the Linux kernel in the future.
Historical reference
In 2007, Seagate and Samsung introduced the first hybrid drives: Seagate Momentus PSD and Samsung SpinPoint MH80. Both were 2.5-inch and had 128 MB or 256 MB of flash memory. The products are not widely available.
In May 2010, Seagate introduced a new hybrid product called the Momentus XT drive and used the term " Solid State Hybrid Disk (SSHD). It includes 500 GB of HDD memory with 4 GB of integrated NAND flash memory.
In April 2013, WD introduced 2.5-inch WD Black SSHD drives, including 5 mm thick SSHDs with 500 GB of regular memory and flash memory in sizes of 8 GB, 16 GB and 24 GB.
Pros and cons of hybrid HDDs
The main advantage of a hybrid hard drive is a significant increase in the performance of the disk subsystem, especially in netbooks and laptops, where hard drives are less powerful and you cannot install a second drive, as in a regular PC. It’s not for nothing that the very first SSHD disks were developed in the 2.5-inch laptop format. Later, 3.5-inch hybrid drives were released. Although now in laptops with a disk drive, it is possible to replace it with a hard drive or solid-state drive, but I will tell you how to do this in one of the following articles.
The disadvantages include the inability to fit all critical data on the flash memory of an SSHD disk. But it also doesn’t make sense to install more than 32GB on a hybrid SSHD, since it will be cheaper to buy a regular 64GB SSD.
At the moment, their price is significantly higher than that of conventional hard drives. For example, at the time of writing, a 1 TB hard drive Seagate Desktop SSHD model ST1000DX001 cost about 6,000 rubles, and its competitor 1Tb Western Digital WD Blue SSHD WD10J31X cost about 5,500 rubles. At the same time, a regular 1 TB Seagate Barracuda ST1000DM003 hard drive will cost you 3,600 rubles. And this includes models with only 8GB of memory. With more quantity the difference will increase. But this is still several times less than the cost of an SSD of similar size.
Conclusion
Hybrid hard drives are a compromise solution that allows you to both increase the overall performance of the system in which they are installed and reduce its price.
You could say this is an evolutionary development of conventional HDDs. Due to the increased cache, it was possible to reduce the number of disk accesses, which was reflected in reduced power consumption and heat dissipation, durability and reduced noise during operation. All this makes them much more productive and practical than HDDs, and several times cheaper than SSDs.
The original purpose that SSHD was supposed to fulfill - a low-cost replacement for solid-state drives and hard drives in laptops and mobile computers - has been successfully achieved. After testing the technology and eliminating the shortcomings, manufacturers began to produce 3.5-inch formats for a regular PC.
Thus, for an expensive PC and laptop, it is better to choose a high-speed solid-state drive with a large capacity on which to install the operating system and the programs and applications necessary for work, but for a regular PC and especially a laptop, an SSHD is ideal, which will replace obsolete and slow ones hard disc drive.
Two-in-one devices have always attracted buyers because combining technologies in one device often improves the performance of the devices. Naturally, the price for the set will be decent. Take, for example, a video dual device, a laptop-tablet or an MFP. Manufacturers of hard drives also decided to resort to crossing the two technologies, introducing inexpensive SSHD drives to the market. The article focuses on the hybrid hard drive, the pros and cons of the device, as well as reviews from happy owners.
A holy place is never empty
The expensive technology of very fast SSD drives and affordable but very slow HDD magnetic disks have created a huge gap in the hard storage media market, both in the price and speed categories. There was an urgent need for a golden mean that could satisfy the user not only with its characteristics, but also at an affordable price. This is how a symbiosis appeared - SSHD disks. Nothing depends on the user in the operation of the device. Everything works automatically. In fact, for the owner the process of operation of the hybrid drive will be invisible in terms of installation and installation. There is no need to install any drivers; the controller is detected and controlled by the computer's BIOS. You can only see the result - a significant increase in performance, which is noticeable when loading the system and launching resource-intensive applications, including games.
How it works
The principle of operation is quite simple and is somewhat reminiscent of the operation of a central processor. Magnetic hard drives have long used caching technology, where frequently used information is read from a magnetic disk and written to the memory of the built-in chip on the hard drive. The chip size is disproportionately small (8-128 MB), but this is quite enough for the system to operate. Naturally, the chip is able to communicate with the processor at enormous speed. The technology used by hybrid hard drives involves the presence of another chip created using SSD technology, but with a larger capacity. As a result, the processor turns to the hard drive for information.
- If the information is in the level 1 cache, it is provided instantly.
- If the information is not in the 1st level, the access is transferred to the 2nd level cache. Since the second level uses an SSD, information is also quickly provided to the processor.
- Information is read from the surface of the magnetic disk, which slows down the operation of the entire system.
Feasibility of installation
At first glance, it may seem that the main consumers in the market for these drives are owners of personal computers. After all, for a laptop, devices without rotating components are preferable for safety and shock resistance reasons. However, judging by numerous reviews from owners, hybrid hard drives are purchased specifically for laptops. Portable devices require volume first and then performance. And if for a personal computer it is not problematic to install several storage devices of different form factors, then a laptop has a serious limitation. In addition, installing an SSD is impractical due to limited capacity and high price.
Reasons to buy a new drive
For most laptop owners, the main problem in their work is the failure of the hard drive with the loss of important information for the user. As an alternative solution, the seller offers three options.
- Install the same HDD drive, for example a 500 GB hard drive, but with increased shock resistance of 1000 G. In this case, the purchase costs will be minimal, as will the performance.
- Install an SSD, losing capacity, spending a lot of money, but gaining in performance.
- Install a hybrid SSHD drive, getting high performance, affordable cost, and large capacity.
Naturally, thanks to this approach of sellers, judging by the numerous reviews from happy customers, hybrid drives have conquered the portable device market.
Two hard drives in a laptop?
It is not necessary to install a hybrid hard drive for a laptop instead of a standard device. Due to the presence of a mass of various adapters on the market, it is possible to install an additional hard drive in the system. There are many options. Starting from the USB and eSATA interface, ending with the desoldering of unused SATA ports on the motherboard of a portable device. And only one option deserves special attention from users. We are talking about a device called Second HDD Caddy, which resembles a pocket for connecting hard drives to a running personal computer.
Due to its size and interfaces, this pocket should be installed instead of a standard DVD optical device. Naturally, it can only be installed in laptops where this drive is preinstalled. As a result, the user receives a second hard drive, which, in addition to a huge amount of storage capacity, provides excellent performance at an affordable price.
Priorities for PC
A hybrid hard drive for a computer will be more useful for game lovers. After all, most synthetic tests on office computers show that the weak link is the processor or video adapter, but not the magnetic disk. And only in gaming systems, when there is a powerful video card, a strong central processor and fast RAM, does the hard drive become the culprit of all the problems.
Installing an SSD can solve performance problems, but the high price and small amount of memory do not suit half of potential buyers. Judging by numerous reviews, the hybrid device is also used under the system. The 8 GB Level 2 cache can accommodate a working Windows system with all its services and drivers, including the page file. This offload will not only allow games to run faster on the processor and memory, but will also significantly speed up the work of applications related to video encoding and working with flash.
How to see performance
Hybrid hard drives are the only drives that allow you to see first-hand system performance, as well as measure and compare the results before and after improvements. It sounds fantastic, but it's a fact. Everything is very simple. After mounting and installing the operating system, the controller on the drive needs time to capture frequently used files, which it will place in the second-level cache. Sometimes you have to perform 5-7 system reboots for the drive to start working in the desired mode, providing high performance. If the SSHD disk was purchased as an additional drive, for games, for example, then you need to launch the game, play, exit, and restart the computer. The result of the controller's operation will be noticed immediately when the operating system or favorite game loads several times faster.
What's on the market for PC
When choosing, the user may encounter the problem of selecting the required device. We are talking about the assortment - it is too small for the huge market of computer components. Market leaders Seagate, Western Digital and Toshiba introduced devices with SSHD technology to the world. But only Seagate provided the buyer with a choice; the rest were limited to a couple of models. Judging by numerous expert reviews, all developed countries have long replaced magnetic drives with SSDs. And only in third world countries, where not every buyer can afford a device at a high price, are such hybrid miracle devices sold. The manufacturer Seagate offers customers SSHD drives in all sorts of variations, ranging from memory capacity and cache sizes of the 1st and 2nd levels, ending with spindle speed.
Decent model
Hard drives with a capacity of several terabytes will not surprise anyone today. In pursuit of volumes, the user loses sight of many other factors.
- Speed of chaotic reading from disk. The larger the volume, the more difficult it is for the read head to find information. Even though this parameter is measured in milliseconds, the result is quite noticeable in a synthetic test.
- Rationality of purchase. Reading reviews from many buyers, we can conclude that there is no point in purchasing a drive larger than 1 TB. Having spent a large amount for excess space, the user is not able to fill it with data.
Apparently, the manufacturer Seagate also came to the same conclusions, focusing on a 500 GB SSHD hard drive with a spindle speed of 5400 rpm. It is the ST500LM000 model that participates in all synthetic tests to compare performance with other hard drives; judging by the results, it has few competitors in terms of operating speed.
To take or not to take?
In any case, the rhetorical question will concern the buyer when choosing a hard drive. After all, SSHD technology is not the best hard drive for PC and laptop owners. The goal of producing a hybrid drive, first of all, was to saturate the market with devices that combine large capacity and fast NAND memory at a low price. You need to stop here and make decisions based on the needs of use.
- A high-capacity drive that was always full to capacity failed - an SSHD drive will be an excellent replacement. With a difference of 300-500 rubles, the buyer will receive increased productivity.
- You need an ultra-fast computer for games, and the information on the hard drive rarely exceeded 100 GB - you can’t find a better SSD. It may be more expensive, but it's worth it.
- There is a need for additional storage media for documents and multimedia - a regular, cheapest HDD drive will be the best purchase.
Finally
By summarizing the information, it is possible to draw conclusions, thanks to which any user will make his own decision, as did specialists from popular computer publications. And judging by numerous reviews, these findings are quite interesting.
- For users who have a gaming computer with high-performance components, buying one or two SSD drives will not hurt their pockets, because for them the FPS (frames per second) in the game is more expensive than any banknotes.
- In search of an inexpensive magnetic drive, very often the buyer resorts to buying it on the secondary market. In our country this is a fairly common option.
- Only a handful of people who are looking for compromises, eager to get maximum performance and know how to count their money will look at hybrid hard drives.
Many people have already heard about the new hybrid hard drives, but most are wondering if they are worth buying? Or maybe, instead of hybrids, it’s better to take a small SSD drive (or a large one, there’s a lot of money), install the system on it, and install a regular hard drive for data? Now I will try to shed light on this issue.
After my laptop fell off the table, the hard drive had to be replaced. There is no space in the laptop for a separate SSD drive, so you can only plug one device into it. I settled on a Seagate ST1000LM014-1EJ164 hybrid hard drive with a capacity of 1 TB, and an SSD cache of approximately 8 GB. This is certainly not as much as we would like, but it’s better than nothing at all. This hybrid drive cost me almost 7,000 rubles.
The hybrid disk cache is entirely hardware and there are no programs to configure or optimize it. Programs and files that are frequently used, including system files, are cached.
Pros of a hybrid hard drive
I list the advantages that I was able to identify when using a hybrid from Seagate:
- when using "quick start" Windows, the system loads 25-30 percent faster,
- applications that we often use launch several times faster,
- copying files up to 500 MB, even within different logical drives, occurs at high speed, equal to approximately 200-300 MB/sec (I think the file is first copied to the cache, and then transferred to the hard drive during idle time),
- the whole machine works faster and there are fewer bottlenecks.
Cons of a hybrid drive
Let us note some disadvantages, but they are not critical:
- the cost is almost 2 times more than a regular hard drive,
- low SSD cache volume (in general, there are all sorts of disks, they have 32 and 64 GB, but the cost is appropriate).
Conclusion, is it worth buying?
Let's move on to the most important thing, and here I have two answers, and they depend on your operating conditions for the computer.
I think it’s worth buying them only for laptops when it is not possible to install a second separate drive in it. If you have a desktop computer and there is space in it (usually there is always some), then it would be best to take a separate SSD drive with a capacity of 64 GB to 128 GB (this is if you plan to keep only the system on it). And if finances allow, then you can fork out for a 1-2 TB SDD, I think it will be great.
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