By Marc Farley
An creation to garage units, Subsystems, purposes, administration, and dossier platforms * study basic garage options with this entire advent * evaluate garage equipment applied sciences, together with Fibre Channel, SCSI, ATA, and SATA and comprehend their makes use of in community garage subsystems * know about key garage tactics resembling quantity administration, garage virtualization, information snapshots, mirroring, RAID, backup, and multipathing * make clear the jobs of dossier platforms and databases inside of community garage * Take the subsequent step-this booklet prepares you to turn into a garage networking expertStorage networking has develop into a necessary factor in web info infrastructures. changing into efficient during this new and critical know-how sector calls for a valid figuring out of garage applied sciences and rules. garage Networking basics can provide an in-depth look at an important garage applied sciences. the whole garage panorama is defined, incorporating a whole view of approach, gadget, and subsystem operations and approaches. the best way to shield information successfully utilizing mirroring, RAID, distant replica, and backup/ restoration structures. digital garage applied sciences, reminiscent of quantity administration, RAID, and community virtualization, are analyzed and mentioned intimately. High-availability garage via dynamic multipathing and clustered/distributed dossier structures is defined as are designs for strong garage subsystems. eventually, the complicated and arcane worlds of dossier structures and SCSI are clarified, together with the function of initiators, goals, logical devices, and LUNs.
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Additional info for Storage Networking Fundamentals: An Introduction to Storage Devices, Subsystems, Applications, Management, and File Systems
This type of topology can be supported with multiple access paths to create centrally managed storage with excellent data availability capabilities. Q&A 1: How much downtime is allowed per year to have five-nines availability? 2: Before SANs and NAS, what was DAS called? 3: DAS is used by which storage technologies? 4: True or false: DAS allows storage devices to be connected and disconnected while the system is operating. 5: What is the relationship between host systems and storage using DAS? 6: What is the relationship between host systems and storage using network storage?
And all sorts of other meandering speculations. The whole thing wasted an obnoxious amount of time. It really bugged me that so many people were spinning their wheels on discussions that would not be resolved due to the lack of a fundamental functional analysis. That's what led me to develop the three-legged stool analysis of connecting, storing, and filing. For the most part, when people understand this analysis, their confusion over SAN and NAS positioning melts away. In the remainder of the chapter, we'll look at how connecting, storing, and filing work together in storage networking processes.
Figure 2-11. A LAN with NAS Connected to a SAN, All Using the Same Connecting Technology Part I: The Big Picture of Storage Networking 45 46 Part I: The Big Picture of Storage Networking NOTE This example is not intended to suggest that putting SANs and LANs on the same physical network is the preferred way of doing things. But it does help drive home the point that connecting, storing, and filing are, in fact, three independent and orthogonal functions. Summary This chapter presented readers with the fundamental analysis tools that run throughout the book.
Storage Networking Fundamentals: An Introduction to Storage Devices, Subsystems, Applications, Management, and File Systems by Marc Farley