As mentioned before, the best place for the H170 over the B150 is to support RAID. And, in addition to the common RAID0, RAID1, RAID10 can also support advanced RAID5
Many people questioned that the H170 is not suitable for playing RAID because the integrated RAID performance is limited. This is indeed a fact, just as in the past with the chip's sound card, integration is generally not as good as an independent sound card. At that time because of the independence of the independent sound card alignment, it would not receive any interference from other motherboards. At the same time, the sound cards above the midrange have operational chips, and the thrust is stronger (8,738 for 30, fake Yamaha 734 and the like). In addition, those basically can fly the plane). The gap between the graphics cards is even greater.
However, not everyone really needs a separate RAID card. Specifically consulted the master of familiar with the server - Daisy old monster has consulted the Internet cafes in the world, a few friends in the world network Meng, get some professional advice (only sparse, shallow, just learn a little fur)
First of all, the professional array card is with cpu, with cache, using SAS interface server hard disk. Use SATA hard disk to play no value
Second, PCH-integrated RAID is not without merit, and at least speed has advantages.
How to understand this point? The speed of the PCH chip is equal to the DMI speed. Z77 to Z97 are DMI 2.0, and the speed is about 1000MB; the Z170 is DMI3.0, which is about 1800MB. Of course, you must take into account the bandwidth occupied by other devices, such as integrated network cards, sound cards, USB, and other ports.
The independent RAID card, the high-end is generally pci-E X8 interface to the PCH chip until the Z170 feed, ZCH PCH still has PCI-E 3.0 4x, Z97 and before only the pci-E 2.0 4x. There is no way to link roads. So you can only insert pci-E 16X slot, which is directly connected to the cpu pci-E slot, mainly to stabilize
The server's PCH chip is free of heat, and the desktop-class passive cooling. So, what is your CPU cooling?
Independent RAID Advantages in Stability and Concurrency
However, the use of soft volume RAID for Internet cafes, which is a RAID for window systems, has the advantage of easier maintenance and more security.
Again, the biggest advantage of using a RAID card is to expand the interface, and the built-in CPU will not be too strong. Equivalent to soft routing to improve "hard" routing (in addition to power consumption)
Cheap RAID cards are not as powerful as they are generally. There are many things in the front half of this post (professional zhuangbi). Professionals are welcome to come and take pictures. It is best to use used RAID cards and use cases. Thank you.
First look, I use the H170 RAID test
This time, the protagonist is actually a RAID. The H170 and ST 10TB NAS hard drives are props.
The H170 and Z170 have the same disk function. They also support six SATA3s. They also support four RAID modes (JBOD is strictly speaking not an array mode). The difference is that the Express-SATA interface is one less than the other.
The H170 also supports the M2 interface and even the Ultra M2 interface. If the ordinary M2 is the SATA3 interface, the speed is 6 Gbps, if the pci-E interface is 10 Gbps.
The Ultra m2 can support 32 Gbps of bandwidth
It should be noted that using the M2 interface SSD, two SATA3.0 interfaces must be occupied after they cannot be used. In general, 0, 1 or 4, 5 interfaces are used. No experience used 2,3, please correct me
ST Seagate’s ultra-high-capacity hard drive was lucky enough to participate in NAS activities and borrowed four
It is said that there are now 12TB hard drives, and 10TB is at the top of the list.
Let's take a look at the first run
A single ST 10TB hard disk, continuous reading and writing has been around 220MB/s, it is estimated that it has reached the top of the mechanical hard disk
How is the speed of two disk groups RAID0?
Basically double the full speed to 450MB/s, 450MB/s
So if four together on the Raid0?
The result is close to the effect of 1+1+1+1=4, the reading is over 900MB/s, and the writing is around 800MB/s.
Of course, 4k random read and write, and 4k long queue read and write. Mechanical hard disks still have inherent problems
So. If it is a group RAID5?
Testing continues, first review four common RAID modes
RAID0 is an offensive type, which is equivalent to writing data into multiple hard disks, and the speed is close to the weakest hard disks X2, X4, X6X8 and so on. The capacity is equal to which of the four hard disks is the smallest multiplied by 4, and basically, the capacity is the sum of four hard disks.
RAID1 is a defensive type, with one or a group of hard disks to achieve data 1:1 image preservation, hard disk available capacity is 50%
RAID10 is both offensive and defensive, with the current saying is Box2Box midfielder, since there is RAID0 speed, both RAID1 stability, hard disk available capacity is 50%
RAID5 is equivalent to using a hard disk to verify, the hard disk capacity utilization is high. RAID 5 can be understood as a compromise between RAID 0 and RAID 1. RAID 5 can provide data security protection for the system, but the protection level is lower than Mirror and disk space utilization is higher than Mirror. RAID 5 has data read speeds similar to those of RAID 0, but with just one more parity check, writing data is slightly slower than writing to a single disk. At the same time, because multiple data corresponds to one parity information, RAID 5 has higher disk space utilization than RAID 1, and the storage cost is relatively low. It is currently a more widely used solution.
Take a look at how the H170's South Bridge plays RAID5
There are about 650 reads, which is equivalent to three hard disk groups RAID0, however, write .........
I can't stand it anymore. I hope to add a friend at server level RAID.
H170 is for individual users, group RAID1 play is still very good, after all, two hard drives can be 1:1 backup, RAID5 looks like the threshold is still high