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Conclusion Introduction Once we already published a Thecus NPRO NAS review in which we examined the majority of the device capabilities and measured the key data storage system performance indexes. Neither have we overlooked Thecus D expansion unit that lets the administrator expand the disk space available to the NAS.


However, Thecus company also provides an array of other capabilities that allow either for expanding the disk space available to the users to an even greater extent or maintaining Thecus D16000 NAS Server operation of the network storage system. These were the exact capabilities that we promised to review in one of Thecus D16000 NAS Server previous reviews. It's time to deliver on our promises and therefore in this review we will get our users familiar with the following capabilities that we tested with two NPRO: Stacking The main point of stacking technology is very simple: In order to add a remote partition one should use NAS Stacking sub-group in the same menu group.

The only thing that one will need to do after its connection is to format the new partition. The new disk space will become available to the users as a separate folder depending on the access protocol used. Naturally, we decided to carry out performance measurements of the NASes upon stacking. The test stand scheme is presented below. The light-green arrow shows the direction of data transfer between the test host and main NAS. The red arrow shows the direction of data transfer between two data storage systems; in other words, in this case a dedicated link between the devices was used. Results of the measurements are presented on the diagrams below. Stacking technology allows for connection of a remote iSCSI partition using the same link that is used for connection of users in the way as it's shown on the scheme the light-green arrow shows connection of a user to the NAS, whilst the red arrow shows the connection between the NASes.

By looking at the diagram we can see that the presence of a dedicated link between the NASes Thecus D16000 NAS Server lead to any kind of substantial increase in performance of the whole system. Volume expansion 10 GE connection is necessary for operability of the volume expansion feature Network Management-Networks. In order to do this one should select the disks, specify the array type and network connection used, and set the address of the main device to which all other Thecus data storage systems will be connected.

Upon successful creation and connection of all expansion units in the network up to eight units one will need to perform building of a distributed array JBOD with XFS. A created distributed array is almost equal to the local one. Exactly as in testing the stacking feature, we also connected the NASes using a dedicated link. An increase in the speed of systems with the dedicated link remains within the measurement accuracy, whilst in all other respects with the exception of one measurement we can consider the performance of both systems equal. Also we decided to compare performance of the technology under review upon connection of one expansion unit located on a local and remote device.

Upon connection through SMB protocol there's almost no difference whether the local or remote connections are used, whilst upon connection via iSCSI the disks that were located locally allow for higher access speeds.

Thecus' D16000 and N16000 NAS daisy-chained!

Integration of several local disk sets, merged in arrays of various Thecus D16000 NAS Server, came to be a nice capability. Data transfer between NPRO was carried out via a dedicated channel. High availability Apart from the capability of expanding the disk space available to the users, Thecus NASes provide the administrator with a capability of building a fault-tolerant system; in other words, it's a system that maintains high availability of the information stored in it.

Obviously, building such a system is not a common operation, and even upon having a toolkit that the owners of Thecus data storage systems possess it can be difficult to get rid of stoppages and system breakdowns. Still it is possible to mitigate their impact on the company workflow in general though the deployment of a fault-tolerant solution is not free. However, let's take our Thecus D16000 NAS Server and tell you Thecus D16000 NAS Server everything in parts. One of the simplest methods of increasing the system availability is aggregation of network interfaces using which the administrator can protect the system against a one-time failure of the NAS network card, switch port, or patch-cord.

Ideally, this kind of a link must be connected not simply to one switch, but to a stack of switches or to various interface cards located in one chassis.

Thecus Announces bay 3U Rackmount NAS Dedicated To Daisy-Chaining - D - Legit Reviews

However, reviewing these issues falls far beyond the scope of this article. There are also much easier methods of protection against the failure of one of the data storage system interfaces. Unfortunately, the mentioned protection method Thecus D16000 NAS Server be called universal since, for example, it's not supported by desktop versions of Microsoft Windows OS. And again we got a bit distracted.

The LSI SAS e HBA card is only necessary while connecting the first D to Thecus D16000 NAS Server host of Thecus NAS. For the second, third, and fourth D, HBA  Missing: Server. “Generally, we are happy with the Thecus NPRO NAS we tested.


It demonstrated stable data transfer speeds and possesses an array of capabilities that.

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