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Topic: Disk controller

	Disk array controller - Wikipedia, the free encyclopedia
		In computing, a disk array controller is a computer hardware device which provides secondary storage services to computer systems, often in large servers.
		It is the critical component of a disk array.
		A disk array controller usually attaches to a number of disk drives in disk enclosures which are organised into RAID sets or groups for data protection and performance reasons.
	en.wikipedia.org /wiki/Disk_array_controller (263 words)

	Disk Controller
		The disk controller does not know that it is now talking to a new disk drive, and the head position of the new disk drive may be different from the old one.
		As soon as the controller tries to execute any read or write command, it will notice that the data coming from the disk drive is claiming track 23, instead of the 10 it expected.
		Signals are named from the perspective of the 1793 disk controller chip, so "input" means input to that chip from either the computer or the disk drive, and "output" means an output from the 1793 to one of those.
	www.cs.unc.edu /~yakowenk/coco/text/diskcontroller.html (1304 words)

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		Because the HD disks need double the magnetic field strength for recording, you should not attempt to format a 1.2M HD disk as though it were a 360K disk, or a 360K disk as though it were a 1.2M HD disk.
		Their controllers have been fixed to allow the RWC signal to be sent to the drive even when the controller is sending the 250KHz data rate.
		The 3 1/2-inch disks are covered by a more rigid jacket than are the 5 1/4-inch disks; the disks within the jackets, however, are virtually identical except, of course, for the size.
	cma.zdnet.com /book/upgraderepair/ch13/ch13.htm (19856 words)

	Using hard disk controller caching with SQL Server
		If the cache controller never fails to write to disk what has been entrusted to it (even if the keyboard sticks, the operating system crashes, or the hard disk crashes), there will be no problem.
		On the other hand, if the disk controller delays the writing of some SQL Server log data and chooses to physically apply other log data (because of the "elevator" sorting) and fails to write the rest of it for some reason, SQL Server has no way of knowing that some of the log is missing.
		If the disk controller does not allow selective write-through, the only alternative is to make frequent backups and never rely on warm start or rolling the transaction log forward.
	support.microsoft.com /default.aspx?scid=kb;en-us;46091 (651 words)

	Wesley's PIC Pages: IDE Controller
		When a disk is connected as an IDE device the PC-AT still 'sees' the old-type control registers of the ancient MFM disk controller.
		When a control signal is inverted the 8255 pin is connected to one of the inputs of the 74HC04 and the (corresponding) output of the 74HC04 is connected to the IDE bus connector.
		The output of the inverter is connected to the controller's /IRQ input.
	www.pjrc.com /tech/8051/ide/wesley.html (6935 words)

	Hard Disk Drive Guide - What is an IDE Hard Disk Drive
		Prior to these drives, hard disks were interfaced to a PC motherboard via an expansion board known as a hard disk controller.
		In most cases when a computer says it has a problem with the hard disk controller, it has a problem with the electronics on the drive.
		Subsequently, the IDE Controller expansion board electronics and the connector for the drive cable were incorporated into most motherboards.
	www.duxcw.com /digest/guides/hd/hd3.htm (462 words)

	Storage Disk Drive (Site not responding. Last check: 2007-10-08)
		As a drive reads a signal from the disk drive platter, the preamplifier is used to amplify minute analog signals before they are sent to a read-channel IC for digitization.
		The hard disk controller manages the job of transferring data between the DRIVE and host during read and write operations.
		SoCs integrate the functionality of the read channel, hard disk controller, servo logic, microprocessor and memory on a single piece of silicon. Originally developed for the desktop PC segment, the cost/power/performance benefits of SoC designs have broadened their use into enterprise, mobile PC and fixed/portable consumer electronics applications.
	www.agere.com /storage/storage_disk_drive.html (502 words)

	LOAD disk driver
		Since most controllers can be configured more than one way, you must specify parameters for the controller each time you load a disk driver.
		If the controller can have two hard disks cabled to it, make sure that disk 0 is cabled and addressed as disk 0 and that it is terminated.
		Disk 1 needs to be cabled and addressed as disk 1, but it should not be terminated.
	www.novell.com /documentation/nw312/sysadenu/data/fm53960.html (2198 words)

	Disk controller - Wikipedia, the free encyclopedia
		The disk controller (or "hard disk controller") is the circuit which allows the CPU to communicate with a hard disk, floppy disk or other kind of disk drive.
		The most common disk controllers in use are IDE and SCSI controllers.
		High end PCs, workstations and network file servers mostly have SCSI adaptors.
	en.wikipedia.org /wiki/Disk_controller (108 words)

	StorageTek Product: FlexLine™ 200/300 Series storage systems
		Controllers are available in three tiers, ranging from the flagship, high-performance FLX380 and FLX280 enterprise disk controller to the flexible, fully-featured FLX240 mid-range disk controller to the FLX210 entry-level disk controller.
		The FLX240 disk system is a full, end-to-end 2-gigabit Fibre Channel storage solution with the business continuity features necessary to manage and protect data today.
		They can be paired with different controllers for a solution tailored to your specific storage environment.
	www.storagetek.com /products/product_page2702.html (1175 words)

	[No title]
		It used a DMA device interfaced to a floppy disk controller for sector transfers.
		In order to synchronize the CPU with the variable response of the disk drive, a simple I/O locking mechanism was implemented, by utilizing the S-100 lines connected to the CPU chip READY or WAIT control pin.
		Except for the execution of a brief routine that prepared the DMA for a disk transfer, there was no other disk I/O overhead for the CPU to perform.
	retrotechnology.com /herbs_stuff/sdfdc.html (2284 words)

	SST Introduces Stand-Alone ATA Flash Disk Controller For Embedded Mass Data Storage Market (Site not responding. Last check: 2007-10-08)
		The controller can be easily integrated into a customer's processor board for space savings or be combined with flash media devices to create any specialty embedded memory module.
		The controller manages the interface between the industry standard ATA bus and flash media, eliminating the complexities and associated overhead of writing specialized firmware to support functions such as bad-block management, error correction and flash media wear leveling, which are required in order to achieve reliable data storage operation.
		The controller's internal flash memory is factory preprogrammed with Embedded Flash File System firmware, which recognizes the external flash media upon power-up and performs all the necessary "handshaking" routines for media support.
	www.semiseek.com /News/press_release3307.htm (904 words)

	Computer Technology Review: Integrated disk controller brings disk drives to desktop (Site not responding. Last check: 2007-10-08)
		One of the enabling technologies significant to the disk drive industry was the integrated disk controller, which brought disk drives to desktop systems in the early '80s.
		We were just building chips at the time, and then a customer said: "We need a reference platform to show us how to integrate your chips onto boards." So we supplied them with a reference platform.
		We basically had that chip and then we had the floppy disk controller as well.
	www.findarticles.com /p/articles/mi_m0BRZ/is_5_24/ai_n6095516 (584 words)

	The PC Guide Discussion Forums - hard disk controller problem
		It is the boot disk and functions better since i took the new hdd off the chain.
		I have a feeling that i may be giving up and reformatting the drive using the IBM disk manager software and saying bye bye to the data on the disk...
		I copied the important stuff off the disk and reinstalled from scratch including running a utility to tell the hdd to report it's correct size so that it could be formatted correctly.
	www.pcguide.com /vb/printthread.php?t=10010 (1333 words)

	Method to off-load host-based DBMS predicate evaluation to a disk controller (US5495601)
		A method is disclosed for a database system for [off-loading] off-loading, to disk [controller] controller, the extraction of committed [data involving the] data.
		If it [is] is, then the controller processes the page and adds any qualifying data from that page to a defined answer set.
		A method for a database system to off-load to a controller the extraction of committed data to answer a query while updates could be performed on such data, comprising the steps of:
	www.delphion.com /details?pn=US05495601__ (628 words)

	SATA Hard Disk Controller Recommendation Needed (by Jeremy Zawodny)
		Nick Wang: NCQ is implemented on disk itself and has nothing with controller.
		If you have disk arrays which handle that throughput at even BURST rates, you have a hardware budget that is significantly larger than mine...
		Using the SATA controller as JBOD and using Linux' md driver gives you the advantage of replacing disks, motherbords, or controllers, without having to recreate your array.
	jeremy.zawodny.com /blog/archives/002610.html (1891 words)

	BlueDisk Universal Floppy Disk Controller Card
		This is a description of the BlueDisk Universal Floppy Disk Controller Card, including ordering information.
		He just couldn't format a disk with his new MFM floppy drive (we told you in our special offer note).
		Any low cost standard PC type floppy disk cable can be used with no problems, and you can buy it around the corner at your local PC dealer.
	www.wbwip.com /shh/bluedisk.html (1624 words)

	FDC37C78 Floppy Disk Controller - SMSC
		The FDC37C78 incorporates SMSC's true CMOS 765B floppy disk controller, advanced digital data separator, 16 byte data FIFO, on-chip 12 mA bus drivers and two floppy direct drive support.
		The FDC37C78 Floppy Disk Controller also incorporates Software Configurable Logic (SCL) for ease of use.
		Use of the SCL feature allows programmable system configuration of the key floppy disk controller functions.
	www.smsc.com /main/catalog/fdc37c78.html (249 words)

	SS30 Floppy Disk Controller (Site not responding. Last check: 2007-10-08)
		The DC5 Floppy Disk Controller is an all-new design for the Southwest Technical Products Corp. 6800 and 6809 computers.
		It plugs into the SS-30 I/O bus and fully emulates the SWTPC DC4 controller and clones.
		The DC5 will boot and run all SWTPC Disk Operating Systems (that were designed for the DC1 to DC4 controllers).
	home.comcast.net /~swtpc6800/DC5/FDC_Index.htm (396 words)

	AtariAge Forums -> Atari 1040STf Floppy Disk Controller
		My floppy disk controller seems to be fried because it not reading disks anymore.
		Can the floppy disk controller be swapped or can I get an external drive or will that do me no good since that is controlled also by the floppy disk controller or no?
		that's the most common problem for not reading disks - if the drive is ok - you could swap the disk controller chip with one from another ST (cheapest option - silly money to buy i believe - hope you're good at soldering!)
	www.atariage.com /forums/index.php?showtopic=59950 (389 words)

	1782 disk controller failure
		When I boot the computer, I get the 1782 Disk Controller Failure message, and I'm given two options.
		Device manager says the primary and secondary hard disk controllers are working properly.
		When I boot, using the F1 option, the hard disk spins up, loads the o/s and all is well.
	www.daniweb.com /techtalkforums/showthread.php?t=3401 (548 words)

	PCMicroStore / Disk Controller (Site not responding. Last check: 2007-10-08)
		This HBA is ideal for HP tape arrays and larger non-RAID storage applications.
		The Smart Array 641 Controller is a 64-bit, 133MHz PCI -X, single channel, SCSI array controller for entry-level hardware-based fault tolerance that allows you to configure up to 6 internal hard drives to store up to 1.80 TB of storage.
		The Smart Array 642 Controller is a 64-bit, 133MHz PCI-X, dual channel, SCSI array controller for entry-level hardware-based fault tolerance that allows you to configure up to 6 internal and 14 external hard drives to store up to 2.9 TB of storage.
	www.pcmicrostore.com /CBC.aspx?q=c:36333 (297 words)

	USB97CFDC2-01 USB (Universal Serial Bus) Floppy Disk Controller - USB 1.1, Mass Storage, Connectivity - SMSC
		The USB97CFDC2-01 is an integration of an Enhanced Multi-Endpoint USB 1.1 Peripheral Controller, a 32K Byte Program ROM, and the SMSC Floppy Disk Controller used in many of its Super I/O products, such as the FDC37C869.
		Provision for external Flash Memory up to 32K Bytes for program storage is provided for customized applications.
		Several pins are provided for controlling external power control elements and sensing specialized drive functions.
	www.smsc.com /main/catalog/usb97cfdc2_01.html (364 words)

	Disk Controller - Compare Prices, Reviews and Buy at NexTag - Price - Review
		Disk Controller - Compare Prices, Reviews and Buy at NexTag - Price - Review
		EMC CLARiiON AX100 2U Dual Controller Disk Array Enclosure with four 250GB SATA Dr...
		Storage Type: Array, Controller, Other - Capacity: 250
	www.nextag.com /disk-controller/search-html (149 words)

	"Non-System Disk Error" with LBA Hard Disk Controller
		When you are starting Windows 95, you may receive the following error message:
		This error message can occur if you are using an LBA (logical block addressing) BIOS-only controller with an older hard disk for the boot drive, causing incorrect drive parameter translations in hard disks that are not LBA addressable.
		Use the newer LBA drive as the boot drive instead of the older drive.
	support.microsoft.com /support/kb/articles/q156/5/54.asp (120 words)

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