Winners of this phase-$20 Amazon.com gift card
BAZ, kita, hugu, MahMush, Vien
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Winners of this class-20 HiCoins
【Answer】1.ABC 2.B 3.A 4.ABC 5.D
【Winner】zaheernew, hugu, MahMush, kita, Vien
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Hello, everyone!
Join the Community Learning week IT Storage class!
IT class learning time of this phase: April 12th – April 17th.
Answer time of this class: April 16th, 2 AM - April 17th, 10 AM (UTC+0)
Class topic
Post 1. Scale up and Scale out
Scale-Up is a traditional vertical expansion architecture. It continuously adds storage devices to the existing storage systems to cope with ever-increasing data volumes. Scale-Out is a horizontal expansion architecture. It adds more controllers to meet the requirements of data growth in the unit of nodes. ...(more)
Post 2.What is RAID - TP in Dorado V3?
RAID Triple-parity (TP) is a specialized disk array mode. RAID-TP is a triple parity raid which means it accommodates up to three drive failures & it provides greater data protection than other RAIDs which support double parity and accommodate up to two drive failures. ...(more)
Post 3.What is RAID 2.0+
Background of block virtualization and reconstruction of traditional RAID: The overall performance of the application system deteriorates, and the long reconstruction time and data loss risks increase. Traditional RAID is limited by the number of hard disks. ...(more)
Post 4. RAID 0, RAID 1, RAID 5, RAID 6 and RAID 10
There are several popular RAID levels, including RAID 0, RAID 1, RAID 5, RAID 6 and RAID 10. Let us take a deeper look at each of these RAID levels....(more)
Post 5.Difference between Raid and JBOD
JBOD drives are individual drives, meaning that each drive in your system is seen by your computer as an individual disk volume. JBOD drives allow you to easily add additional storage to your system - just connect another drive - and allows for easy to manage, and less expensive backup solutions....(more)
Class Questions
After attending this class, please answer the following questions and comment with the answers below this post.
1. (Multiple-Answer Question) Which of the following statements are true?
A． Horizontal scaling: Adds more controllers to a storage system to cope with ever-increasing data volumes.
B． Vertical scaling: Continuously adds storage devices to the existing storage systems to cope with ever-increasing data volumes.
C． Serial Attached SCSI: Connects disks by leveraging parallel SCSI and serial connection technologies.
2. (Single-Answer Question) On a typical 4:2 RAID 6 system, they typically show about 67% utilization, but how much does the capacity utilization increase on a 25-disk Dorado v3?
A. 10%
B. 20%
C. 30%
D. 40%
3. (True or False) Huawei provides RAID 2.0+ technical support by designing and developing traditional RAID, LUN virtualization, and block virtualization.
A. True
B. False
4. (Multiple-Answer Question) Which of the following statements are true?
A. RAID 0 -- striping
B. RAID 1 -- mirroring
C. RAID 5 -- striping with parity
D. RAID 6 -- combining mirroring and striping
5. (Single-Answer Question)Which of the following statement is wrong for JBOD?
A. Drives independently attached to the I/O channel
B. Scalable, but requires server to manage multiple volumes
C. Do not provide protection in case of drive failure
D. Self-contained, manageable unit of storage
Hope you get good grades, come on! 
Click to learn: >>>previous class – IT
Waiting for your answers. 
