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Topic: Disk storage

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  Disk storage - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-11-06)
Disk storage is a group of data storage mechanisms for computers; data are transferred to planar surfaces or disks for temporary or permanent storage.
The random-access, low-density storage of disks has historically been complemented by the sequential-access high density storage provided by magnetic tape.
Vigorous innovation in disk storage technology, coupled with less vigorous innovation in tape storage, has reduced the density and cost per bit gap between disk and tape, reducing the importance of tape as a complement to disk.
www.eastcleveland.us /project/wikipedia/index.php/Disk_storage   (560 words)

 Disk - Wikipedia, the free encyclopedia
In mathematics, a disk is a geometrical object.
In the 19th century, disk became the conventional spelling for audio recordings made on a flat plate, such as the gramophone record; this usage gave rise to the modern term disk jockey.
Whatever their heritage, in computer jargon today it is common for the k-spelling to refer mainly to magnetic storage devices, while the c-spelling is customary for optical media such as the compact disc and similar technologies.
en.wikipedia.org /wiki/Disk   (517 words)

 The Rosetta Project: The Rosetta Disk   (Site not responding. Last check: 2007-11-06)
Reading the disk requires a microscope, either optical or electron, depending on the density of encoding and can be combined with a typical Optical Character Recognition system to read the text back into digital formats relevant at the time of reading.
Disks will available through purchase or donation to The Long Now Foundation, or given free to native communities and relevant organizations or individuals.
The Rosetta Disk is held in a four inch spherical container that both protects the disk as well as provides additional functionality.
www.rosettaproject.org /live/disk   (655 words)

 The Hindu : Tape or disk storage? Maybe both
The choice of enterprise storage systems may not be as clear-cut as champions of disk systems might suggest.
Disk array systems with their much faster transfer speeds and their ability to swiftly and non-linearly reach the data one wanted, have captured most of the high-end of the enterprise storage business, as the best bet for both primary storage and secondary back up.
They are already gearing for the day when both tape and disk will hit the physical limits of magnetic storage — their areal density or the maximum amount of data they can store per square cm.
www.thehindu.com /thehindu/seta/2004/09/16/stories/2004091600201400.htm   (887 words)

 Disk storage - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-11-06)
The random-access, low-density storage of disks has historically been complemented by
the sequential-access high density storage provided by magnetic tape.
in disk storage technology, coupled with less vigorous innovation in tape storage,
encyclopedia.worldsearch.com /disk_storage.htm   (559 words)

 Tertiary Disk
Disk areal densities have been increasing at 60% per year, with 8 GB 3.5 inch disk units currently available.
Also, a disk array needs to be connected to a host computer, which becomes a bottleneck for both performance and availability.
Tertiary Disk is a storage system architecture which exploits the trends mentioned above to create large disk storage systems that avoid the disadvantages of custom built disk arrays.
now.cs.berkeley.edu /Td   (475 words)

 Virtualization, regulations to keep disk storage strong | InfoWorld | News | 2005-07-08 | By China Martens, IDG News ...   (Site not responding. Last check: 2007-11-06)
The disk storage systems market is set for continued steady growth over the next four years, according to a report market research company IDC released Thursday.
The disk storage systems market experienced its second consecutive year of growth in 2004 since the IT industry's downturn of 2001 to 2002, with IDC estimating global revenue of $22.6 billion, up 4.4 percent compared with 2003.
There were no surprises in the identities of the top three disk storage systems vendors, with Hewlett-Packard at No. 1 with 23.1 percent of the market in 2004, followed by IBM (Profile, Products, Articles) with 20.2 percent of global revenue and EMC (Profile, Products, Articles) with 14.4 percent.
www.infoworld.com /article/05/07/08/HNdiskstoragestrong_1.html   (1499 words)

 CorData   (Site not responding. Last check: 2007-11-06)
Since tape is used for such a variety of storage functions, in organizations of all sizes, it has almost become a “fixture” in today’s networks.
Over the last few years, the cost of hard disk storage has been wrongly inflated by the major storage vendors to cover for the most part their inflated overheads and inefficient ways of doing business.
An organization’s choice of tape, hard disk or optical storage dictates the type of risk to which the organization’s data is exposed.
cordatasys.com /pages/818730   (2181 words)

 Redundant Disk Storage
Disk storage for OPS data is made redundant by using RAID on disk arrays or, in two-node clusters only, by LVM mirroring.
However, if a data disk is damaged, and not mirrored, any application which depends on that disk will not be available until the problem with the disk is repaired.
For example, Figure 2-8, “Root Disks on Different Shared Buses ” shows a supported configuration in which two nodes share an external SCSI bus and Node A has its primary root disk connected to the bus, but node B has its primary root disk connected to a different bus.
docs.hp.com /en/B5158-90044/ch02s03.html   (1346 words)

 Jan's Computer Basics:6-3 Disk Format
A disk sector is a wedge-shape piece of the disk, shown in yellow.
On a hard disk, a cylinder is made of all the tracks of the same # from all the metal disks that make up the "hard disk".
The computer keeps track of what it has put where on a disk by remembering the addresses of all the sectors used, which would mean remembering some combination of the cylinder, track, and sector.
www.jegsworks.com /Lessons/lesson6/lesson6-3.htm   (610 words)

 Hard disk drive manufacturers on STORAGE search .com
Editor's comments:- in an earlier article I predicted that Samsung, the world's leading semiconductor storage company, would be one of the top 10 storage companies within the next 3 years, with a storage revenue similar or larger than that of HP.
The average storage for a wired home in 2007 will be greater than 500 GB and for homes with backup and a home entertainment network or media center that number will be greater than 1 TB.
Storage for content creation, editing, archiving, and distribution is expected to jump from 1.7 EB (exabytes, 1018 bytes) in 2004 to 15.4 EB in 2008.
www.storagesearch.com /diskwin.html   (4112 words)

 IBM Makes Breakthrough in Disk-Drive Storage Capacity
At this size, a single-platter disk drive will be able to hold 6.5 gigabytes of data, making possible ultraslim laptop computers that will nevertheless have vast storage capacity.
While in the past such advances in storage technology were driven by high-speed supercomputers and huge mainframes, in recent years it has been the ever-increasing demands of desktop and laptop computer users that have spurred the disk-drive industry on to new record densities.
I.B.M. introduced the world's first disk drive in 1956, with five megabytes of storage at a cost of $10,000 a megabyte.
partners.nytimes.com /library/cyber/week/123097ibm.html   (483 words)

 Disk Space Analysis & Management Software-DataTex Engineering
Storage Triage has command line parameters that allow it to be scheduled and run in a 'Batch Mode'.
Storage Triage not only provides you this information in a consolidated manner displaying the entire company storage analysis and provides the export of the gathered data for reporting purposes for corporate reporting and compliance requirements.
Disk Utilization Reporting solutions from DTEC International can ensure that your organization is compliant with all applicable laws as well as maximize your organizations disk space and reduce unnecessary server and storage upgrade and expansion expenses across your enterprise or server platforms.
www.datatexcorp.com /html/StorageTriage.htm   (1032 words)

 Computer Technology News - Tape vs. Disk: Another View
Technological advances and manufacturing efficiencies have made disk media better than ever, giving both consumers and enterprises more "bang for the buck." And for primary backup that aids business continuation in case of a disaster or other type of problem, disk makes sense.
Lauffin's series is that tape, in the form of "near-line" database extensions for infrequently used or "dormant data" is still very much an applicable technology, on par with and more cost-effective than disk (when used with disk arrays in a tiered storage system).
By moving unused data off of high performance disk storage, the system is scrubbed and only actively used data remains.
www.filetek.com /press/media/tapevrsdisk.htm   (505 words)

 Tiered storage and disk backup budgeted for '05   (Site not responding. Last check: 2007-11-06)
Step one in the plan was a move to tiered storage, said Mike Rainville, senior Unix administrator and storage manager for the group.
Disk is getting so inexpensive that it's becoming increasingly viable as low-rent storage.
Storage managers are turning to technology to keep from having to add more staff.
searchstorage.techtarget.com /originalContent/0,289142,sid5_gci1022654,00.html   (958 words)

 What is floppy disk? - A Word Definition From the Webopedia Computer Dictionary
Unlike most hard disks, floppy disks (often called floppies or diskettes) are portable, because you can remove them from a disk drive.
Disk drives for floppy disks are called floppy drives.
Floppy disks are slower to access than hard disks and have less storage capacity, but they are much less expensive.
www.webopedia.com /TERM/f/floppy_disk.html   (474 words)

 D2D - Disk to disk backup on STORAGEsearch.com
Editor's comments:- Nexsan is #95 in our list of the top 1,000 storage companies (ranked by reader pageviews) so being in the top 10%, and a pioneer in the disk to disk backup market, they ARE influential.
Special shock absorbent elastometric shuttles were designed to enable disks to be used in high vibration environments and to be easily removed and locked away for security reasons.
A few years later the Jaz drive, a 1G byte removable disk with rugged handling characteristics provided one of the first examples of true affordable disk to disk backup.
www.storagesearch.com /d2d.html   (2031 words)

 News > Press Releases > Fujitsu And JMR Demonstrate 2.5" Serial ATA Hard Disk Drive Storage Solutions - Fujitsu ...
With over 20 years of experience in the data storage industry, JMR continues to prove itself as a leader in technology with its innovative advances in Serial ATA protocol.
As one of the first manufacturers to develop a complete family of Fibre Channel storage solutions, JMR offers a wide array of scalable storage systems to handle both bandwidth- and I/O-intensive environments.
The company's FORTRA family is an advanced, modular storage technology incorporating patented technologies with solutions spanning from 4-, 6-, 8- and 10-bay desktop FC or SCSI JBODs, 10- and 15-bay Fibre-to-Fibre RAID solutions, as well as 12-bay SCSI- or FC-to IDE RAID arrays.
www.fujitsu.com /us/fcpa/news/pr/20030915-01.html   (896 words)

 Tom's Hardware Guide Mass Storage: Mass Storage Articles In Chronological Overview - Articles And Reviews Released In ...   (Site not responding. Last check: 2007-11-06)
Seagate's new Momentus allows notebooks to be equipped with hard disks featuring up to 120 GB of capacity while setting new records for transfer rates and access times.
The presence of a hard disk to back up the DVD burner has radically changed the role of the TV watcher - instead of being a mere passive participant, the viewer is now an active protagonist who can interact with the TV, even in real time.
You've read about how unreliable storage media is, but like failing to floss your teeth every day, even the best of us sometimes neglect to do the necessary and don't regularly back up our hard disks.
www17.tomshardware.com /storage   (2278 words)

 Disk Storage - Storage Area Network - TotalStorage, FAStT600, IBM, EMC, Hitachi   (Site not responding. Last check: 2007-11-06)
The fully configured FAStT600 storage server with turbo option will be available as an upgrade for current FAStT600 users in September.
Storage is a critical component of your IT system.
Look to MARK III Systems for the best in disk storage products from the top names in the industry.
www.markiiisys.com /diskstorage.html   (356 words)

 Solid Data Systems: Turbocharging Disk Storage System Performance
Solid state disk systems - now financially feasible for Windows NT and Unix environments - may offer a way out from under unacceptable disk storage system performance.
Sitting between a server and a storage system - redundant array of independent disks (RAID) storage system or even just a bunch of disks (JBOD) system - an Excellerator solid state disk (SSD) system from Solid Data Systems may be the answer.
Another alternative, cache memory in a storage controller, is a well-tested method of speeding disk performance.
www.soliddata.com /products/technology/aberdeen.html   (860 words)

 IBM Redbooks | AS/400 Disk Storage Topics and Tools
This redbook is designed to help AS/400 system administrators and operators gain a broad understanding of AS/400 disk storage, architecture, and management.
You’ll also learn about the storage features that are available to maximize the availability and performance of the disk subsystem.
For the AS/400 system, DASD is another term for disk storage.
www.redbooks.ibm.com /abstracts/sg245693.html   (190 words)

 EMC overtakes HP in disk-based storage market | InfoWorld | News | 2005-03-04 | By Robert McMillan, IDG News Service
Overall, sales of external disk-based storage systems were up 4.7 for the year, totalling $14.2 billion, but that growth slowed to less than 1 percent during the fourth quarter.
The worldwide market for all disk-based storage, which includes storage systems shipped inside of servers, was dominated by HP and IBM.
For the full year, in which $20.8 billion worth of disk-based storage was sold, HP had sales of $4.9 billion, or 23.6 percent of the market.
www.infoworld.com /cgi-bin/redirect?source=rss&url=http://www.infoworld.com/article/05/03/04/HNemcovertakeshp_1.html   (1195 words)

 Information Storage Industry Center - Contact Us   (Site not responding. Last check: 2007-11-06)
Customers did not back up to disk in the past due to the high cost of disk storage space.
In the ESG, the Evolution of Enterprise Data Protection report a large number of customers are using ATA drives in their storage arrays and are performing backup to disk.
Tony Asaro is a senior analyst for the Enterprise Storage Group responsible for the management of the ESG Lab service.
isic.ucsd.edu /newsletter/d2d.shtml   (1092 words)

 LasCon Storage - 3390 disk information   (Site not responding. Last check: 2007-11-06)
The terms 'track' and 'cylinder' come from old pre-raid disks, which were like 8 old fashioned vinyl records stacked in a pile, with a set of fixed read/write heads which moved in and out of them.
Modern disks use FBA storage, but they have to emulate 3390 CKD format, so the terms 'track' and 'cylinder' are still used.
This happens when the disks are logically configured in the hardware.
www.lascon.co.uk /d008003.htm   (597 words)

Outpacing the overall disk storage systems market, Sun's overall storage revenue grew 22 percent sequentially versus an almost two percent decline for the market.
Sun Network Storage provides products that address a broad range of customer requirements, from the entry level to the high-end, and has demonstrated significant growth in each of these areas.
Specifically, the 10 percent sequential increase in mid-range (disk storage systems in IDC price bands between $15,000 and $300,000) revenue this quarter illustrates the success of Sun's newest product line, the Sun StorEdge 6000 family.
www.sun.com /smi/Press/sunflash/2003-09/sunflash.20030905.1.html   (585 words)

 AC&NC | RAID.edu - Disk I/O Benchmarks - UNIX Benchmarks
Greatly improved disk I/O benchmark based on the code for Bonnie by Tim Bray.
Bonnie++, rewritten in C++ by Russell Coker (russell@coker.com.au), adds the facility to test more than 2Gb of storage on 32-bit machines, and tests for file creat(), stat(), unlink() operations.
IOstone is a multi-platform disk, file I/O and buffer cache efficiencies benchmark program.
www.acnc.com /benchmarks.html   (668 words)

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