Since 360 ​​announced the suspension of network disk services, we all realized that cloud disk is not reliable. We do not know when it will be closed. Our hard-won collection of videos, music, and e-books is likely to be gone. Although Baidu cloud disk still exists, but there are too many uncertainties. We don't know when to announce service suspension. Only building our own private cloud is the most reliable. Also I have been considering buying storage devices. Has also been concerned about WD, QNAP, Synology and other brands of NAS devices.
The component private cloud is nothing more than two component network and storage device NAS. For the average home network, the device is relatively single and is the router's choice. Most routers now use the AC protocol with Gigabit LAN interfaces. NAS has also become the key. Because recently the company was doing a backup project, I had the opportunity to experience the Qnap TS-253A NAS device. Just open a box, share it, deceive gold coins.
The equipment that originally got this QNAP is not very concerned, and the size of the dual-disc cabinet is also very small. Feeling is a relatively simple NAS device, the function is not complicated. But slowly I found my initial thoughts wrong.
Perhaps too little insight, initially underestimated the price of this NAS device, initially thought that the price of this dual-disc cabinet without a hard disk is also in 1K-2K, the model of the curious label was watched on the east of the milk tea. Word days, this price is old. Anyway, the company saves money and I play it.
QNAP TS-253A 4G In-memory NAS Network Storage Quad-Core Dual System 4280 Yuan Jingdong Direct Link 
TS-253A this storage design is quite satisfactory, looks old Shen, silver-gray metal frame, black plastic panel. Without the LCD panel, no information about the device, such as status, IP address, etc., can be seen from the outside.
In addition to the cooling fan holes on the back of the machine, the main interface is also distributed. From the top down on the right side, HDMI*2, USB3.0*3, Gigabit Ethernet*2, and the power supply interface are sequentially provided. There are some audio output ports under the fan, this NAS device is mainly for home use.
The hard disk bracket of the NAS device is also relatively easy to disassemble. Simply remove the hard disk by pulling the buckle, and all support hot-swappable plug. Hard disk support The front panel is distributed with even fan holes that allow the hard disk to dissipate heat. Bad heat dissipation If the temperature is too high, the mechanical hard disk may be damaged.
This machine is equipped with two more expensive hard drives, WD's 8TB red disk, and two hard disks add up to the price of the chassis. Immediately feel that the company really tyrants. . .
Western Digital / WD 8T red disk 8TB NAS server disk array 3.5 desktop hard drive WD80EFZX2640 yuan Jingdong direct link 
Removing the hard disk The machine body is very light, and the internal structure is not complicated, a fan and a relatively small circuit board. The machine is limited to the built-in voltage transformer without power supply module, using an external power adapter transformer power supply.
The bottom label of the machine indicates the MAC address of the network card and the serial number of the host.
The machine is equipped with two Gigabit Ethernet ports. Two types of 6 network cables are used to connect the two ports so that port link aggregation can be performed later.
System part:
Power-on test system, QNAP NAS uses DHCP, IP address is not fixed, the machine does not have LCD panel can display the device IP address, you can download Qfinder Pro through the official website to scan the network NAS devices.
Double-click the listed device to automatically open the device's login interface. The interface design of the device is similar to the style of Linux.
This device is not the new device originally had some data and settings, so before using it to restore the settings. There are three modes of recovery, the first one and the third one involve data, so the operation requires extra caution. In order to completely eliminate the data, I still choose to be more violent and Reinitialize the NAS to fully recover and reconfigure. This operation requires the administrator password to be reconfirmed to prevent misoperation. The reset time is still relatively long to see how much data, half an hour to an hour or so, after the completion of the automatic restart to enter the initialization interface.
It should be noted here that if the device has previously set a static IP address, the address will be lost, the default is the DHCP address, then you have to re-Qfinder Pro scan to obtain a new management address. If it is DHCP, it will not change under normal circumstances. DHCP identifies the MAC address, and the IP address does not change when the MAC address is not changed.
The initialization operation is also relatively simple, simply configure the device name, set the password for the admin user name, the device management address, and the hard disk array mode.
Set the name of the device, this can be freely taken, generally simple and easy to remember on the line is not recommended to obtain too long, unless you deliberately do not want others to remember. Setting the password for admin is more important and may not be very sensitive for home users. If the password for the enterprise is admin, it is still sensitive.
Here is to set the IP address, if you choose the DHCP is relatively simple and no need to set, if you set the static address you need to manually set all the parameters, DNS can be set or not to set, to see how the equipment used.
With regard to the configuration of the disk array, it should be noted that the device has only two slots, and the selected array is also Raid1 and Raid0. If Raid0 is configured, the data is evenly distributed on the two hard disks to obtain the maximum capacity and the highest access rate. Speed, but high risk, once a hard drive fails, the data is lost. If Raid1 is configured, the two hard disks write the same data and have high security. However, the space is small. Two hard disks only use the capacity of one hard disk, and the data is written to two hard disks at the same time, and the performance is also low. How to match the key to how to choose.
Here is a snapshot snapshot feature, the essence of this function is to create a backup node, I think it is more practical. This function is more practical for putting more documents in the environment, especially in the enterprise. If the document stored on it is accidentally deleted, or if the document is suddenly damaged, you can restore it to the previous node by taking a Snapshot-generated snapshot. Instead of searching for recovery tools on the web. But this feature also takes up disk space.
After the initial configuration is complete, it can be used. Through IE into the web management interface, the main interface style of Qnap is a bit of Linux GUI style. There are many kinds of landscaping theme background design optional
By clicking on the summary icon of the desktop, the summary information window of the device is popped up, and the status information of some devices, the occupancy rate of the CPU memory, the traffic information of the network, the instantaneous speed, and the status of the hard disk can be seen through the window.
Click Control Panel to enter the menu management interface of the system. The menu management function is more complete, and the configuration options are also more. Mainly look at several aspects that are more practical. For some details, there is not much to explore.
Through the storage management interface, you can view the capacity and utility of the storage volume, further view the information of each slot hard disk, hard disk status, model, capacity, operating temperature, and the firmware version of the hard disk, serial number, the information can be viewed or compared Fine.
Of course, you can view more than just this information. You can use the built-in tools to automatically detect the timing. If the device is set up with SMTP, you can automatically send the test report to your personal mailbox.
In the privilege management, the design is mainly allocated to the privilege. The management of the device's function can also be the setting of the access privilege of the resource. Of course, it must be implemented in conjunction with the shared folder. This NAS can be combined with the domain, this feature can be of great use in the enterprise.
The key to NAS devices is disk configuration and network setup. There are two Gigabit ports on this NAS device that cannot be wasted. I also enabled the link aggregation function here. After the success of the binding, the natural link bandwidth will increase from 1G to 2G. Of course, configuring link aggregation requires the support of switches or routers. Balance-tlb alone does not require the support of additional devices. At present, home routers support link aggregation is still relatively small.
In fact, the speed of current Gigabit network cards is fast enough. If the number of home terminals is relatively small, the single network port Gigabit is sufficient. If the terminal devices are compared, there is often a large amount of data that needs to be uploaded or downloaded to the NAS device. Enable link aggregation. The overall throughput is different from that of a single network card.
The read speed of single network port can reach more than 100MB/s, which is close to the highest speed of Gigabit Ethernet.
The speed of link aggregation consisting of two Gigabit ports can reach 1G+ and up to 1.5G. Perhaps because it is not connected to the same switch, there is still a big gap from the theoretical value of 2G. However, overall throughput has advantages over single network cards.
The protocols supported by the network are also numerous. In addition to CIFS of WINDOWS, NFS of LINUX, and AFP of MAC, basically the most commonly used client protocols support. In addition, it supports Telnet, SSH, FTP, SNMP and other network protocols.
Supported application services are more complete, and TFTP, VPN, SQL, WEB, and other network services are sufficient to meet the network application requirements of most small businesses.
to sum up:
Since the 360 ​​network disk was announced to close, more and more netizens are aware that the network disk is not reliable, and they are slowly considering buying NAS devices to build their own private cloud. The function of this QNAP TS-253A has been compared. Powerful, performance is also good, more suitable for small business use, but for ordinary home prices may still be expensive. For home users, they may pay more attention to offline plug-in and other plug-in functions, such as Thunder Assistant or some video offline download functions.
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