Evolution of IBM PC

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Questions and Answers

What was not an option for the original IBM PC in the early 1980s?

CD-ROM drive

5-and-1/4-inch floppy drive

Hard disk (correct)

Tape drive

Why was having a local hard disk important for early computers?

It increased the computer's input/output capacity

It provided a means of storage for data (correct)

It provided additional processing power

It allowed for remote access

What is a major challenge when moving storage from local to network-attached?

Increased security risks

Reduced storage capacity

Higher energy consumption

Potential bottlenecks in data transfer (correct)

What is the primary purpose of network-attached storage technologies?

To enable faster data transfer between devices Signup and view all the answers

What is the term for the physical hardware running a hypervisor that supports virtual machines?

Host Signup and view all the answers

What is the name of the VMware hypervisor mentioned in the content?

vSphere Signup and view all the answers

What type of drive was used for storage in the original IBM PC?

5-and-1/4-inch floppy drive Signup and view all the answers

What is the term for storage that is connected to the computer directly?

Direct-attached storage Signup and view all the answers

What is the primary difference between iSCSI and NAS?

iSCSI is block-based storage, while NAS is file-based storage Signup and view all the answers

What is the benefit of using a separate network for iSCSI storage?

It provides a dedicated network space for storage, increasing reliability Signup and view all the answers

What is the term for a network designed specifically for storage devices?

Storage Area Network (SAN) Signup and view all the answers

What is the acronym for a protocol used by NAS systems?

NFS Signup and view all the answers

What is the primary advantage of using Fibre Channel over Ethernet (FCoE)?

It allows for the use of existing Ethernet infrastructure Signup and view all the answers

What is the term for a network interface card (NIC) that is dedicated to accessing storage?

Storage NIC Signup and view all the answers

What is the protocol used by the host in the video to access the Synology iSCSI disk?

iSCSI Signup and view all the answers

What is the primary advantage of using network-based storage in a virtualized environment?

Simplified virtual machine migration Signup and view all the answers

What is the primary difference between Fibre Channel and Fibre Channel over Ethernet?

Fibre Channel requires proprietary hardware, while Fibre Channel over Ethernet uses standard Ethernet networks Signup and view all the answers

Why is fault tolerance recommended for the iSCSI storage in the video?

To prevent data loss in case of failure Signup and view all the answers

What is the primary purpose of a vCenter in a VMware environment?

To manage multiple ESXi hosts Signup and view all the answers

What is the purpose of using a separate network for Fibre Channel over Ethernet?

To isolate storage traffic from virtual machine traffic Signup and view all the answers

What is the term for a dedicated network that is logically isolated from the rest of the network?

Virtual Local Area Network (VLAN) Signup and view all the answers

What is iSCSI based on?

Small Computer System Interface commands Signup and view all the answers

What is the result of moving a virtual machine to a different host with network-based storage?

The virtual machine's memory state is transferred Signup and view all the answers

What is the primary benefit of using a dedicated network for storage?

Dedicated bandwidth for storage access Signup and view all the answers

What is the result of using Fibre Channel over Ethernet?

Improved reliability of storage access Signup and view all the answers

What is the primary challenge of moving a virtual machine to a different host with locally attached storage?

The virtual machine's storage is tied to the local host Signup and view all the answers

What is the benefit of using multiple network adapters for Fibre Channel over Ethernet?

High availability and fault tolerance for storage access Signup and view all the answers

What is the primary characteristic of Fibre Channel networks?

High-speed and reliable, but pricey Signup and view all the answers

Study Notes

Evolution of Storage

The IBM PC, introduced in the early 1980s, did not have a hard disk as an option; instead, it used 5-and-1/4-inch floppy drives for storage.
Later models, such as the IBM XT, AT, and PS/2, introduced hard disks, which were directly attached to the computer.

Importance of Storage

A computer needs storage to function, in addition to input/output, CPU, and memory.
Local hard disks were essential for early computers, but with the shift to modular technologies, storage is often network-attached.

Network-Attached Storage

Network-attached storage allows devices to access storage over a network, rather than locally.
This enables benefits like moving virtual machines between hosts without worrying about storage access.

Storage Architectures

Fibre Channel is a dedicated network for storage, offering high-speed and reliability, but is often expensive.
Fibre Channel over Ethernet uses the same technology, but on a standard Ethernet network, making it less expensive.
iSCSI (Internet Small Computer System Interface) uses SCSI commands over an IP network to access storage.
iSCSI is a block-based storage technology, allowing multiple devices to access storage without conflicts.

Storage Area Network (SAN)

A SAN is a dedicated network for storage, where multiple devices access storage blocks at a time.
SANs can leverage existing Ethernet infrastructure, making it a cost-effective option.

Network Attached Storage (NAS)

NAS is a file-based storage technology, where devices access files over a network.
NAS uses protocols like NFS (Network File System) to access storage.
NAS is different from SAN, which is block-based.

Benefits and Considerations

Dedicated networks for storage can improve reliability and performance.
Segmenting storage networks can help reduce virtual machine traffic congestion.
Using virtual local area networks (VLANs) can help create separate networks for storage.

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Description

Learn about the development of the IBM PC, from its early days without a hard disk to the addition of hard drives in later models like the IBM XT and AT.