PPT-Disks Secondary Storage Secondary Storage Typically

Storage systems outside of primary memory Cannot access data using loadstore instructions Characteristics Large Terabytes Cheap few cents GB Persistent data survives power loss Slow 100us 10ms to access . All Fujifilm floppy disk manufacturing plants worldwide have been awarded ISO9002 certification your assurance of stringent quality control at every step of the production process And Fujifilm floppy disks have been successfully tested beyond 30 mil RAID (Redundant Arrays of Independent Disks). Disk . organization technique that manages a large number of disks, providing a view of a single disk of. High capacity and high speed up using multiple disk in parallel. Case Study: Facebook f4. Steve Ko. Computer Sciences and Engineering. University at Buffalo. Recap. Engineering principle. Make the common case fast, and rare cases correct. Power law. Haystack. A design for warm photos. Phil Armitage. Colorado. Processes in Protoplanetary Disks. Disk structure. Disk evolution. Turbulence. Episodic accretion. Single particle evolution. Ice lines and persistent radial structure. Transient structures in disks. ASHIMA KALRA . . Hard disks.. . Floppy disks.. . CD ROMs.. . DVDs.. . INDEX. ….. Floppy Disks. The first floppy disks were 8 Inches in diameter.They hold upto 256 KB.. The next generation were 5.25 inches in diameter.It Could hold up to 1.44 MB.It is a standard one.. and RAID. Outline. Disks. Disk scheduling algorithms. Redundancy in storage . systems, RAID. 2. Disk Geometry. Disks have multiple platters. Each platter has . an arm and a head for accessing data. The arms for the different platters move together. with Dell and Microsoft Storage Spaces. Syama Poluri. Senthil . Baladhandayutham. Brief Introduction to Storage Spaces. Hardware Support & Capabilities. Deployment Considerations. VDI Performance & Efficiency using Storage Spaces. Josh Adams. Senior Program Manager. Microsoft EC CAT Team. CDP-B361. Session Objectives And Takeaways. Session Objectives . Understand the Spaces-based SDS value proposition and architecture. Showcase the proper design workflow. Pawel. . Artymowicz. U of Toronto. MRI turbulence. Some non-MRI turbulence. Roles and the dangers of turbulence. UCSC Santa Cruz 2010. I borrowed some . figures & slides from. X. Wu (2004). R. Nelson (2008). Web Content Distribution-. --3. Case Study: Facebook f4. Steve Ko. Computer Sciences and Engineering. University at Buffalo. Recap. Engineering principle. Make the common case fast, and rare cases correct. (DRAM). Local secondary storage. (local disks). Larger, . slower, . and . cheaper . (per byte). storage. devices. Remote secondary storage. (distributed file systems, Web servers). Local disks hold files retrieved from disks on remote network servers.. Aung Oo. Lead Principal Program . Manager, Azure Storage. Microsoft Corporation. Sirius Kuttiyan. Principal Program . Manager, Azure Storage. Microsoft Corporation. Objectives. Features and capabilities provided by Premium Storage. Two main types: Magnetic and Optical. Random access to memory. The hardware must be controlled by driver software called the “controller” in order to be used. Hard Disks, RAID, and Error Handling. Don Porter. Portions courtesy Emmett . Witchel. 1. Quick Recap. CPU Scheduling. Balance competing concerns with heuristics. What were some goals?. No perfect solution. Today: Block device scheduling.