Questions and Answers
What was not an option for the original IBM PC in the early 1980s?
Why was having a local hard disk important for early computers?
What is a major challenge when moving storage from local to network-attached?
What is the primary purpose of network-attached storage technologies?
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What is the term for the physical hardware running a hypervisor that supports virtual machines?
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What is the name of the VMware hypervisor mentioned in the content?
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What type of drive was used for storage in the original IBM PC?
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What is the term for storage that is connected to the computer directly?
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What is the primary difference between iSCSI and NAS?
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What is the benefit of using a separate network for iSCSI storage?
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What is the term for a network designed specifically for storage devices?
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What is the acronym for a protocol used by NAS systems?
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What is the primary advantage of using Fibre Channel over Ethernet (FCoE)?
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What is the term for a network interface card (NIC) that is dedicated to accessing storage?
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What is the protocol used by the host in the video to access the Synology iSCSI disk?
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What is the primary advantage of using network-based storage in a virtualized environment?
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What is the primary difference between Fibre Channel and Fibre Channel over Ethernet?
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Why is fault tolerance recommended for the iSCSI storage in the video?
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What is the primary purpose of a vCenter in a VMware environment?
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What is the purpose of using a separate network for Fibre Channel over Ethernet?
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What is the term for a dedicated network that is logically isolated from the rest of the network?
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What is iSCSI based on?
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What is the result of moving a virtual machine to a different host with network-based storage?
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What is the primary benefit of using a dedicated network for storage?
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What is the result of using Fibre Channel over Ethernet?
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What is the primary challenge of moving a virtual machine to a different host with locally attached storage?
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What is the benefit of using multiple network adapters for Fibre Channel over Ethernet?
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What is the primary characteristic of Fibre Channel networks?
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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.