A: For this question, I've borrowed from my book, Building Storage Networks, Second Edition. Start at the top and read down.

• Application
• Kernel (interface)
• File system
• File system memory cache
• Kernel
• Volume manager or virtualization agent
• Abstraction layer storing device driver (storage command interpreter mostly)
• Low-level device driver (physical connectivity)
• System memory bus
• System I/O bus
• Host adapter controller wiring, (bus or network) including any virtualization operators in the path
• Subsystem controller
• Subsystem cache (optional)
• Subsystem internal connectivity
• Device controller
• Device buffer memory
• Device media

[IMAGE]Additional Questions:
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[IMAGE]May 2003: What trends do you see in open-systems backup and recovery environments?
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[IMAGE]Apr 2003: What tools can we use to replicate domestic and overseas databases to one another?
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[IMAGE]Mar 2003: We're building an HSM solution to which we'll write 100GB+/month and store it for seven years. Do you think we should use CD, DVD or tape?
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[IMAGE]Feb 2003: I want to consolidate 10TB+ of files onto one system. Would you recommend products from EMC, NetApp or one based on Microsoft's SAK?
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[IMAGE]Jan 2003: I'm out of disk space on my Sun server running Oracle. Is NAS a good choice?
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[IMAGE]Dec ...