Storage

Question 1

How Is Fibre Channel Different From Iscsi?

Answer 1

Fibre Channel and iSCSI each have a distinct place in the IT infrastructure as SAN alternatives to DAS. Fibre Channel generally provides high performance and high availability for business-critical applications, usually in the corporate data center. In contrast, iSCSI is generally used to provide SANs for business applications in smaller regional or departmental data centers.

Question 2

When Should I Deploy Fibre Channel Instead Of Iscsi?

Answer 2

For environments consisting of high-end servers that require high bandwidth or data center environments with business-critical data, Fibre Channel is a better fit than iSCSI. For environments consisting of many midrange or low-end servers, an IP SAN solution often delivers the most appropriate price/performance.

Question 3

What is a typical SAN consist of

Answer 3

• Fabric Switch
• FC Controllers
• JBODs

Question 4

What command in linux will give you the driver version of a hardware device

Answer 4

dmesg

Question 5

How do you speed up storage performance

Answer 5

add a flash cache

Question 6

What is deduplication and compression

Answer 6

deduplication: Redundant data blocks replaced with a pointer
compression: Algorithms used to save space

Question 7

What is the default iSCSI port

Answer 7

3260

Question 8

What is iSNS

Answer 8

DNS for iSCSI

Question 9

How to test storage?

Answer 9

• Various IO sizes, bandwidth, latency
• Random/ Sequential profiles
• Block sizes 4k-128k

Question 10

What linux command manages iscsi?

Answer 10

iscsiadm

Question 11

What is RAID in Windows

Answer 11

It is a strategy for building fault tolerance and increase the storage capacity. On separate drives it allows you to combine one or more volumes so that they are accessed by a single drive letter