Knowledge Base

What is a Hot Spare?

RAID5HotSpare-and-RAID6

When one of the hard drives in a RAID group fails and an idle or standby drive immediately replaces the failed hard drive, this drive is known as a “hot spare”. The “hot spare” hard drive doesn’t store any data when it’s idle. It can be a global hot spare or a dedicated hot spare in a specific RAID group. When one of disks fails in a RAID group, the hot spare disk will replace […]

Jumbo Frame

jumboFrame

What is giant frame / giant packets(Jumbo Frame)? Jumbo Frame is a feature that is supported on the NIC and hub; it’s specifically designed for Gigabit Ethernet industry standard, a long packet format. With Jumbo Frame, you can get Gigabit effectiveness of Ethernet network, allowing data transfer effectively of 50%-100%. A Jumbo Frame is anything bigger than 1518 bytes with a max of 9000 bytes and MPU default of 1500 bytes. In other words, the […]

Link Aggregation

link-aggregation

What is Link Aggregation? Majority of Thecus® NAS offer seven modes of LAG (link aggregation). Load balance, Failover, 802.3ad, Balance-XOR, Balance-TLB, Broadcast and Balance-ALB. What is LAG? LAG is used to bond multiple links between your NAS and your switch into one bigger and faster link, increasing the network capacity while maintaining a fast transmission speed without changing any hardware devices, thus reducing cost. Doing so will offer optimal resource utilization, maximize throughput, minimize response […]

The Differences between block-level and file-level

The Differences between block-level and file-level

Digital Living with HDMI & DLNA

Digital Living with DLNA and HDMI

HA: two letters for a lot of thinking

Thecus High-Availability

Introduction HA stands for High Availability and was at first a computer design approach.  Then it evolved into a more complex paradigm and a Linux-based solution. We’ll talk about both of those aspects. Everything started with the urging needs of more and more available for applications: banking, science, cloud computing, e-mail, gaming and so one. The goal is to get as close as possible from 100% available, which means 0 interruption of service since the […]

NAS in the Cloud

NAS in the Cloud, personal cloud.

The idea of the “Cloud” has been slowly introduced over the past few years, but rarely well explained. Many even use the Cloud every day of their lives, but when asked what it is, simply give a shrug of the shoulders and a bleary eyed “I dunno”. Very simply put, the Cloud is what we have come to know as services on the Internet. Gmail, the iPhone App Store, and Facebook are all concrete examples […]

How Safe is Your Data?

How Safe Is Your Data

iSCSI for beginner

iSCSI_airplane

Introduction   If you want to know more about iSCSI, we’ll have to talk a bit about SCSI. That seems logical! SCSI stands for Small Computer System Interface and is a bus. Basically, that’s a protocol to carry data. Historically, SCSI has always been related to a lot of very different kind of devices (from floppy readers to scanners) but storage got a particular place in its history. For instance, the father of SCSI, Al […]

NAS in the Home

NAS_in_the_home

  NAS in the Home NAS are steadily encroaching on the server market from the higher end, but the more interesting story is the largely untapped market that is home NAS. In the past, there was never a need for a networked device because there were too many barriers to making it practical: slow networks, expensive hard drives, difficult setup. As time goes by, the standard infrastructure is getting more and more suited to running […]