HSC50 Hierarchical Storage Controller - Revision history

Jnc: /* External links */ +HSC50/70 Hardware Technical Manual

2023-12-28T21:47:35Z

‎External links: +HSC50/70 Hardware Technical Manual

2023-09-20T15:47:41Z

successor model HSC70 added

2023-08-31T09:06:03Z

+New cat

2023-08-21T05:57:33Z

Cat added

2022-08-24T15:07:30Z

give DEC alt names

2022-08-24T15:00:24Z

2022-08-23T06:39:50Z

‎Internals: Fixed typo

2022-08-23T06:39:02Z

‎Internals: TU58 is not included in, but connected to module

2022-08-23T06:34:53Z

‎Internals: TU58 added

2022-08-22T19:18:07Z

Argh, missed a section

← Older revision		Revision as of 21:47, 28 December 2023
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	* [http://www.bitsavers.org/pdf/dec/dsa/hsc/EK-HSC50-UG-002_HSC50_Users_Guide_Aug84.pdf HSC50 User Guide] (EK-HSC50-UG-002)		* [http://www.bitsavers.org/pdf/dec/dsa/hsc/EK-HSC50-UG-002_HSC50_Users_Guide_Aug84.pdf HSC50 User Guide] (EK-HSC50-UG-002)
		+	* [http://www.bitsavers.org/pdf/dec/dsa/hsc/EK-HS571-TM-001_HSC_hwTech.pdf HSC50/70 Hardware Technical Manual] (EK-HS571-TM-001)
	* [http://www.bitsavers.org/pdf/dec/dsa/hsc/AA-P672A-TK_HSC50_Maintenance_Guide_1984.pdf HSC50 Maintenance Guide] (AA-P672A-TK)		* [http://www.bitsavers.org/pdf/dec/dsa/hsc/AA-P672A-TK_HSC50_Maintenance_Guide_1984.pdf HSC50 Maintenance Guide] (AA-P672A-TK)

← Older revision		Revision as of 15:47, 20 September 2023
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	The HSC50 can support a total of six disk and/or tape data channels. Each one of these data channels accommodates four cabling bulkhead ports. Maximum disk configuration for a single HSC50 is 24 drives. The maximum number of tape drives in each HSC50 subsystem is found in the relevant HSC50 release notes.		The HSC50 can support a total of six disk and/or tape data channels. Each one of these data channels accommodates four cabling bulkhead ports. Maximum disk configuration for a single HSC50 is 24 drives. The maximum number of tape drives in each HSC50 subsystem is found in the relevant HSC50 release notes.
		+
		+	The successor model to the HSC50 was the [[HSC70]].

	[[Mass Storage Control Protocol]] (MSCP) is a communication protocol used over the CI between a host system and the HSC50. This protocol enables a single class driver to replace multiple device-specific drivers. Separate but similar protocols exist for disk and tape communication:		[[Mass Storage Control Protocol]] (MSCP) is a communication protocol used over the CI between a host system and the HSC50. This protocol enables a single class driver to replace multiple device-specific drivers. Separate but similar protocols exist for disk and tape communication:

← Older revision		Revision as of 09:06, 31 August 2023
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	[[Category: DEC Mass Storage]]		[[Category: DEC Mass Storage]]
−	[[Category:CI Hierarchical Storage Controllers]]	+	[[Category: CI Hierarchical Storage Controllers]]
		+	[[Category: SDI Controllers]]

← Older revision		Revision as of 05:57, 21 August 2023
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	[[Category: DEC Mass Storage]]		[[Category: DEC Mass Storage]]
		+	[[Category:CI Hierarchical Storage Controllers]]

← Older revision		Revision as of 15:07, 24 August 2022
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−	The '''HSC50 Mass-Storage Controller''' is an intelligent [[mass storage]] ~~subsystem~~ [[server]]. It communicates over the [[Computer Interconnect]] (CI), and is housed in a single cabinet.	+	The '''HSC50 Hierarchical Storage Controller''' (alternatively called the '''HSC50 Mass-Storage Controller''' and '''HSC50 Mass Storage Server''' in [[Digital Equipment Corporation\|DEC]]'s documentation) is an intelligent [[mass storage]] sub-system [[server]]. It communicates over the [[Computer Interconnect]] (CI), and is housed in a single cabinet.

	In utilizing the CI, the HSC50 interfaces one or more [[host]] computer systems via the [[SC008 Star Coupler]] (a passive, [[RF]]-[[transformer]] coupling network) to a set of mass storage devices. If the device is a [[disk]] [[drive]], the HSC50 communicates over the [[Standard Disk Interconnect]] (SDI) [[bus]]; if it is a [[magnetic tape]] formatter, the [[Standard Tape Interconnect]] (STI) bus is used.		In utilizing the CI, the HSC50 interfaces one or more [[host]] computer systems via the [[SC008 Star Coupler]] (a passive, [[RF]]-[[transformer]] coupling network) to a set of mass storage devices. If the device is a [[disk]] [[drive]], the HSC50 communicates over the [[Standard Disk Interconnect]] (SDI) [[bus]]; if it is a [[magnetic tape]] formatter, the [[Standard Tape Interconnect]] (STI) bus is used.

← Older revision	Revision as of 15:00, 24 August 2022
(No difference)

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 * Port Buffer Module (L0109 or Pila) - Provides a limited number of high-speed buffers used to stage CI transfers.
 * Port Processor Module (L0107-YA or K.pli) - Functions as the interface between the CI and the rest of the subsystem.
-* Disk Data Channel (L0108-YA or K.sdi) - Supports up to four SDI disk drives (for example, the [[RA80]], [[RA8]]1, and/or [[RA60]]).
+* Disk Data Channel (L0108-YA or K.sdi) - Supports up to four SDI disk drives (for example, the [[RA80]], [[RA81]], and/or [[RA60]]).
 * Tape Data Channel (L0108-YB or K.sti) - Supports up to four STI tape formatters (for example, the [[TA78]]).
 * Memory Module (L0106-AA or M.std) - Contains three areas of memory: control memory (128K bytes), data memory (128K bytes), and program memory (256K bytes).

@@ Line 40: / Line 40: @@
 * Tape Data Channel (L0108-YB or K.sti) - Supports up to four STI tape formatters (for example, the [[TA78]]).
 * Memory Module (L0106-AA or M.std) - Contains three areas of memory: control memory (128K bytes), data memory (128K bytes), and program memory (256K bytes).
-* I/O Control Processor Module (L0105 or P.ioc) - Defines and directs all internal activity within the HSC50 subsystem. Contains an [[F-11]] chip set [[microprocessor]] and a dual [[TU58 DECtape II|TU58]] as load device.
+* I/O Control Processor Module (L0105 or P.ioc) - Defines and directs all internal activity within the HSC50 subsystem. Contains an [[F-11]] chip set [[microprocessor]] and connects to a dual [[TU58 DECtape II|TU58]] as load device.
 == Features ==

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 * Disk MSCP frees the host from responsibility for disk I/O functions and error recovery.
 * Tape MSCP includes those protocol variations necessary for tape functionality in the subsystem.
 == Internals ==