Seagate introduced a new 10-terabyte hard drives, which provide a record capacity for the 3.5 “format. Seagate also able to significantly reduce power consumption compared to 8 TB models, using a helium content and performance level should be lower. In our test lab received hard drives Seagate IronWolf 10TB and BarraCuda Pro 10TB, two interesting version of Seagate in the lineup, “data Guard”, focused on the consumer market.
A few months ago Seagate announced a 10-terabyte hard drives, changing his entire strategy in the consumer market. Under the brand name “Data / Guardian Guardians” are four lines, designed for different areas of use. BarraCuda Pro 10TB and focused on desktop systems as a single HDD, Seagate following tradition. Seagate IronWolf 10TB hard drives designed for NAS, which can be installed in networked storage with the number of drives up to 8 or 16 (Pro version). There are also Skyhawk Drive for video surveillance systems and hybrid drive FireCuda (SSHD).
To ensure a high capacity of 10 TB, Seagate also began to use helium content. WD, using developments HGST Group, applying the same principle to its HDD to 8 TB. Helium has a density of about seven times smaller than the air, which has significant advantages in HDD housing. Due to the lower density of gas results in less resistance to rotary plates, which reduces the power consumption of the spindle motor. Additionally, reduced force acting on the head plate and the rod, which allows for thinner plates and position them closer to each other. Seagate and HGST / WD is now packed up to seven plates in 3.5 “format, in the case of a 10-TB hard drives we get up to 1.4 TB on a plate. It should be noted that the volume of a 3.5” hard drive has become a little more, so some holes for the mounting screws are no longer available.
Hard Drives Seagate BarraCuda Pro 10TB and Seagate IronWolf 10TB operate at a speed of rotation of the spindle 7,200 rev / min, the amount of the cache is 256 MB. As recording media used PMR (Perpendicular Magnetic Recording) which makes no such restrictions on the recording speed as SMR. Due to the above-mentioned advantages for filling with liquid helium, both models consume relatively little energy. According to the manufacturer, power consumption is around 4.5 watts in idle mode and just below 7 watts when access operations when compared to the previously tested 8-terabyte models including WD Red 8TB to 7,200 rev / min, it is slightly higher. 8-TB version of Seagate NAS air filling showed significantly higher levels of power consumption 7.2 / 9.0 W compared to 10 helium-TB HDD.
Both models are very similar in its design to the plates 7, the helium filling and two spindle motors, one of which is attached to the top cover, and the second – to the base. But between models Pro-Pro and there are some differences. In versions BarraCuda Pro 10TB drive and IronWolf tighter tolerances for quality control, but it is not so much higher quality of the individual models as lower probability of error, resulting in higher overall reliability. In order to strengthen the trust of users, Seagate points out the load record 300 TB / year for BarraCuda Pro 10TB, a version “not-Pro” is 180 TB / year The same goes for a longer warranty Pro. But the price Pro models above. But you will get a smaller variation in the quality characteristics of the Pro models. With all the hard drives supported by Pro Service “Seagate Rescue Data Recovery” the first two years after purchase. That is, if the data within the specified time will be lost due to HDD failure, the hard disk can be sent the Seagate, after which the specialists of the company will try to recover the data in the laboratory.
There are technical differences: change the cache management system, also used in models Pro “NVC protected write cache”, which ensures greater data integrity in case of power failure. In fact, the drive takes kinetic energy still rotating plate, the motor generates power. It is used to transfer data from the cache to non-volatile NAND memory.
Let’s start with the hard drive Seagate BarraCuda Pro 10TB.
According to Seagate information, ST10000DM0004 focused on use as a single HDD to PC workstations, and a separate Seagate mentions professionals artists and enthusiasts. We have already noted some of the distinctive features of BarraCuda Pro 10TB.
Another important function BarraCuda Pro 10TB is a multi-level cache. The controller controls the levels of cache in different ways, depending on the load scenarios. The first and the fastest level cache – DRAM memory, which stores write requests at the same time is used for read-ahead. Another level cache – a nonvolatile flash memory NAND, which by Seagate documentation has a volume of from 8 to 32 GB, and is used, inter alia, for caching frequently read data. Another level is caching on the disk. That is in addition to the main storage area that corresponds to the useful HDD capacity, the fastest track of the magnetic disk are allocated under the “Media Cache”. This cache can take data from the DRAM and the cache data buffer large, i.e. load a gigabyte range, providing a consistently high rate. Media Cache is also used to store data from the DRAM in the event of a power failure. Stored data will be restored the next time the disc is loaded, the technology is called “NVC protected write cache”.
For example BarraCuda Pro 10TB can be clearly seen which way to go to manufacturers to continue to increase the storage capacity. The increase in recording density of the plate becomes less effective as a classic recording on magnetic disks is faced with the technical and physical limitations. However, although the rate of increase in recording density and slowed down, the Seagate still managed to set a new record with a capacity of 1.4 TB on a plate. In the case of a 10-terabyte models of similar capacity was made possible not only through the use of helium, but also to optimize the space available in the 3.5 “format.
Today, manufacturers are trying to pack as many plates in the form factor and make them as much as possible. As a result, we have seen the bottom drives solid metal panel and the side openings for the screws to the manufacturer had to be removed because they would conflict with the bottom plate. Location some holes for screwing the HDD is different, so before buying a hard drive, for example, the NAS, check the compatibility table. However, even if the drive is marked as not compatible, the reason may lie in the fact that it is impossible to fasten all four screws, because of the holes for screwing HDD transferred.
For hard disk ST10000DM0004, as well as for the Seagate IronWolf 10TB, it stated the likelihood of unrecoverable read errors Bit 1 to 1015, which is much better than that of conventional hard drives in consumer level. Bit error can result, for example, to the restructuring of the entire array RAID. But as BarraCuda Pro 10TB is focused on the consumer segment, then you can get “broken” file or JPG, for example.
Seagate IronWolf 10TB with the model number ST10000VN0004 positioned to be the leader for NAS systems of primary and secondary levels, compared with the same ST8000VN0002. As indicated by the manufacturer, can be used in the NAS storage systems containing up to eight hard disks. As in the case of other new models IronWolf, starting with 4 TB capacity, the drive is equipped with vibration sensors that “non-professional” HDD – a rarity. For example, it does not have these sensors precursors. Seagate IronWolf 10TB drive is now represented in the Pro version, for which the manufacturer indicates a higher load entry 300 TB / year, and the warranty of 5 years. For all the hard drives in the line IronWolf Pro first two years of service provided Seagate Rescue Data Recovery, allowing to use a professional data recovery in the event of a defect. However, for the hard drives used in the RAID arrays with redundancy, it is not so important.
Seagate IronWolf 10TB ST10000VN004 optimized for NAS systems and is equipped with an adapted firmware, which Seagate calls “AgileArray”. With two rotational vibration sensors and a special balancing on two axes, hard drives provide high performance RAID systems that use several HDD simultaneously. They minimize the mutual influence on each other. Also drives Seagate IronWolf 10TB focused on multi-user operation when the NAS at the same time actively load multiple users.
Like BarraCuda Pro 10TB, Seagate IronWolf 10TB hard drives based on the seven plates with a capacity of 1.4 terabytes, the spindle speed of 7,200 rev / min. As in the case of hard drives BarraCuda Pro 10TB, NAS models have implemented energy-saving mechanisms. Through Extended Power Conditions (Power Choice) technology, various energy-saving measures by reducing the activity of electronic components to the heads of parking, reduce the spindle speed, and even turn off the engines.
Since Seagate caching technology is not separately mentioned, here, it is not likely to use multi-level caching system, as in BarraCuda Pro 10TB. But, at least 256 MB of available DRAM cache, and provides space for Media Cache on disk.
To determine the performance of the hard drive, we connected it to our system and run tests CrystalDiskMark and HD Tune Pro. We used the standard test system with a processor Intel Core i7-6700K and motherboard Asus Z170 Deluxe.
In the CrystalDiskMark test ST10000DM0004 hard drive showed a relatively high peak performance of 250 MB / s sequential read and write speeds. In ST10000DM0004 we got a very decent performance with blocks of 4 KB for the hard drive, the queue depth at the request of 32 she was a little less than 3 MB / s. Only when the individual blocks requests 4 KB read performance is greatly reduced, but the write speed, we still get a good result (for HDD).
The HD Tune Pro test, we see a picture of performance across the disk surface. The data transfer speed depends on their location on the disk. On the outer tracks we get a higher linear velocity than on the inner tracks, so in one revolution of the plate is transmitted more data. Therefore, hard disks exhibit the highest speed at the beginning of the data transmission (with outer tracks). However, in modern HDD is not so simple, because the outcome affects buffering (Media Cache) and a multi-level cache system.
According to HD Tune Pro, ST10000DM0004 showed speed below 250 MB / s, which corresponds to the CrystalDiskMark. On the inner track speed dropped to 115 MB / s.
The performance of the recording situation is almost identical: on the outer tracks speed reaches 245 MB / s on the inner it is reduced to 110 MB / s.
We spent the ATTO Disk Benchmark test, which determines the speed of data transmission with blocks of different sizes. At default settings (Queue Depth 4) ST10000DM0004 drive indicates the maximum transfer rate of about 255 MB / s for reading and 240 MB / s write blocks of 32 KB.
As we have noted above, Seagate IronWolf 10TB largely identical BarraCuda Pro 10TB, although there are differences, too. Both drive spindle running at the same speed with the same configuration and plates, so the serial data rate, we need to get similar results. Of course, should take into account specific characteristics of the spread between the individual models in the series, there are two HDD in a series of never show absolutely identical performance metrics. According to the manufacturer, the variation characteristics of up to 10 percent.
Seagate IronWolf 10TB results exactly match BarraCuda Pro 10TB. With sequential read with a single depth with 32 requests, both 10-TB storage device show the same results, but the serial IronWolf write speed of about 15 MB / s behind the BarraCuda Pro 10TB. Perhaps this is due to the variation in the above-mentioned one line. But, perhaps, the reason lies in the management of Pro cache lines.
The test HD Tune Pro Seagate IronWolf 10TB showed similar characteristics with BarraCuda Pro 10TB in the CrystalDiskMark test. Is it time access BarraCuda Pro 10TB gave slightly lower results.
According Seagate IronWolf 10TB recording speed also showed a very good performance. The curve was slightly lower than that of BarraCuda Pro 10TB, but it can be seen only if you apply them to each other.
For network storage, containing many drives and working in 24×7 mode, the issue of power consumption of hard drives can not be ignored, since it directly affects the operating costs. Of course, in the specifications of manufacturers specify the power consumption at idle and under load, but our own measurements will not harm in laboratory conditions. To measure energy consumption, we have modified the SATA power cable. We set on the line 5 and 12 shunts by means of which received information about the strength of the current. We also analyzed and stress. For the instrumental evaluation, we used a digital oscilloscope. Of course, a simplified system with two multimeters also have coped with the task, but let the oscilloscope to get ten thousand measurements for a second, which are then averaged. What gives a more accurate picture of the whole power consumption.
In idle mode, 10-terabyte hard drives Seagate showed nice low power consumption of the order of 5 watts. They consume less Western Digital Red 8TB, with IronWolf was a little economical BarraCuda Pro 10TB. Compared with Seagate ST8000VN0002, representative hard disks with air-filled 10-TB HDD consumed nearly 3 W less that in case of NAS systems compartment 4 decent yields savings of 14 W (in view of power supply efficiency). Of course, the heat-10 TB HDDs proved markedly below that in some scenarios will reduce cooling requirements of the system, as well as noise.
If IronWolf write operations has shown a level of 7.3 watts, and BarraCuda Pro – 7,7 W, which can be called a very good result. Even if it is slightly higher than that of WD Red 8 TB. Seagate indicates power consumption in active mode, 6.8 W, but perhaps it is the average value for a number of scenarios. We always appreciate the scenario with maximum load, so that the deviation from the manufacturer’s specifications, is understandable.
When the random access operations, the picture remained virtually unchanged. Seagate IronWolf 10TB from 6.1 W and BarraCuda Pro 10TB level to the level of 6.3 Watts worked very effectively, avoiding in this test, the TB WD Red 8, and the difference with ST8000VN0002 was almost four watts.
10-TB Seagate hard drives and WD Red 8 TB consume about 7.5 watts, which is less than 2.5 W decent 8-TB Seagate model with air.
Quite interesting pattern of energy consumption at the start of the disc. This load is the peak character, that is, it is observed a split second, but it is clearly seen that the parallel launch of discs may be a serious problem for the system power supply. Therefore, some NAS models run hard disks at a time, not simultaneously.
In this test, 8 TB WD Red is still working better than anyone, he showed almost 15 watts. BarraCuda Pro 10TB and Seagate IronWolf 10TB consumes about 18.5 watts, but still below the bar of 20 watts, which surpassed ST8000VN0002.
According to the results of tests of energy consumption can clearly see that Seagate has made a significant step forward with the new generation of 10-Tbyte HDD with helium-filled. As power consumption 10-TB Seagate dropped to the level of Western Digital Red 8 TB, which is also filled with helium. However Seagate drives operate with a spindle speed of 7,200 rev / min, instead of 5.400 / min. With this level of power consumption Seagate IronWolf 10TB and BarraCuda Pro 10TB quite comparable to conventional hard drives, but with significantly less capacity.
As for noise, we can only give a qualitative assessment, since in practice the noise level of hard drives is very dependent on their installation. By itself, the hard drive can work very quietly, but after the installation, for example, NAS, all may not be otherwise, since the vibration can be transmitted to the NAS enclosure, the noise will skyrocket. In the case of 10 TB Seagate hard drive worked seamlessly. Noise at work was very quiet, the movement heads felt like a soft click. Compared with the 8-terabyte hard drive, the same ST8000.
Recently between Seagate and Synology products was identified incompatibility problem that will be solved in the next update of the DSM. Based on available information, it concerns all of Seagate storage capacity of 8 TB and more established in the Synology NAS. Meaning SMART “Load Cycle Count” (ID 193) increases rapidly when the drive is idle, that is, there is no access to it.
Since the value of SMART “Load Cycle Count” can not be called critical, for example, to hold a remapping of sectors, there is no visible errors, if unable to view all the values of SMART deliberately. The problem was discovered relatively recently by the user offline synology-forum.de, who was able to repeat the error in two (two available) Synology DSM and various Seagate hard drives. The behavior observed in both 10-terabyte models who participated in our tests, as well as the 8-terabyte NAS-version ST8000VN0002.
In idle mode at the NAS drive has four or five parking transactions per minute, and it was evident at the hearing. Of course, hard drives are certified to 600.000 (ST8000VN0002) or 300.000 (ST10000VN0004) parking cycles, in practice they usually reach much lower values. In this case, the value of SMART unnaturally increased with time, and 24/7 with lots of inactivity phases it could rapidly increase, which could theoretically lead to loss of warranty. Some users have linked the rapid increase in the number of “the LCC” with the phenomenon of “green death” WD Green and the first problems with hard drives WD Red, which seemed like insignificant, but have led to a loss of confidence in the company. Moreover, the procedure continuous unloading recording heads is not very pleasant to the ear.
However, in contrast to the problems in LCC WD drives some time ago, the problem is not with the very hard disks or firmware, and controlled by the host-system. According to the specifications Extended Power Conditions (EPC), the default Seagate drive parks the head after two minutes of inactivity, reactivation occurs after treatment heads or team. But host-system can change this setting through the EPC team, which was the source of the problem in this case.
Synology understand the problem, submit corrections. Most likely, the company does not correctly use the new EPC Seagate drives. Correction will be included in the next update of the DSM, although it is not entirely clear, it is implied here DSM 6.0.3 or even update the current DSM 6.0.2. In our test lab has already received a patch that really works.
As Synology present correction in the near future, owners Synology storage is unlikely to avoid the hard drive or Seagate NAS IronWolf. While it is possible to set the DSM as small as possible period of inactivity, the application or use to prevent the “sleep” HDD, for example, using a constant load on the.
With the new 10-terabyte hard drives Seagate has introduced a very interesting generation. Aggregators Seagate IronWolf 10TB and BarraCuda Pro 10TB showed a convincing performance and a record capacity for modern 3,5 “HDD, non-corporate / server segment.
It seems to us, the most important advantage of the new 10-terabyte hard drives is significantly reduced power consumption compared to previous generation 8 TB, the performance remained the same, and in some places and improved. The reason lies in the fact that Seagate also began to use helium filled hard drives instead of air, resulting in less friction. This technology was previously used Western Digital model for NAS “Red 8 TB” (WD80EFZX). As a result, the two new HDD Seagate IronWolf 10TB and BarraCuda Pro 10TB energy consumption closer to the level of WD Red 8TB, that is, they consume about 5 watts in idle mode and 7.5 watts under load. Compared with the previous generation of Seagate 8 new TB 10 TB model with a helium-filled saves about 3.5 W, which has a positive effect on cooling.
Basic specifications BarraCuda Pro 10TB and Seagate IronWolf 10TB pretty close. Spindle speed in both cases is 7,200 rev / min, helium content and optimizing the use of body volume allowed to set into as many as seven plate capacity of about 1.4 terabytes each. Of course, this led to the fact that of the average for the HDD mounting holes had to be abandoned. Both models use a DRAM cache capacity of 256 MB, and the probability of bit error reading is 1 in 1015, which is better than many hard drives for the consumer market.
There are some differences in scope. IronWolf focused on the NAS scenarios and includes vibration sensors to optimize the drive to work when installed in NAS or servers with multiple HDD. Normal IronWolf designed for the load record 180 terabytes per year, and on IronWolf Pro you get a warranty of 5 years with a load of 300 terabytes per year. BARRACUDA Hard drives, on the other hand, aim to work as a single HDD in desktop PCs or workstations. But a model with greater capacity, including 10 terabytes, available only in the Pro version. Like IronWolf Pro, on BarraCuda Pro drives are warranted for five years, Seagate guarantees entry load 300 terabytes per year. In addition, BarraCuda Pro 10TB using another cache management system, there are non-volatile NAND memory, ensuring data integrity in case of power failure. The problem Synology storage compatible with Seagate drives will soon be resolved, so the barriers to the use of 10-Tbyte HDD Seagate IronWolf and BarraCuda Pro 10TB in Synology storage left.
Of course, the majority of users will attract a record capacity of 10 terabytes. Both drive BarraCuda Pro 10TB and Seagate IronWolf 10TB show a high level of performance and a comparatively low power consumption.