Standard Disk Interconnect - Revision history

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Jnc: /* SDI Family of DSA Products */ Tried to add some SSD's, but they turn out to be DSSI, not SDI

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‎SDI Family of DSA Products: Tried to add some SSD's, but they turn out to be DSSI, not SDI

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‎Further reading: +Digital Storage Technology Handbook

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 * SDI [[Hierarchical Storage Controller]]s (HSCs):
 ** [[HSC40]]
-** [[HSC50 Mass-Storage Controller|HSC50]]
+** [[HSC50 Hierarchical Storage Controller|HSC50]]
 ** [[HSC60]]
 ** [[HSC65]]

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 [[Category: DEC Buses]]
 [[Category: SDI]]
-[[Category: Interface Standards]]
+[[Category: DEC Interface Standards]]

← Older revision		Revision as of 15:22, 2 December 2023
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	[[Category: DEC Buses]]		[[Category: DEC Buses]]
	[[Category: SDI]]		[[Category: SDI]]
		+	[[Category: Interface Standards]]

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 ==SDI Family of DSA Products==
-The family of  products which implement the SDI includes:
+The family of products which implement the SDI includes:
-* SDI Disk controllers:
+* SDI disk controllers:
 ** [[UDA50]] ([[UNIBUS]])
 ** [[KDA50]] ([[QBUS]])
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 ** [[HSC95]]
-* SDI Disk Drives:
+* SDI disk drives:
 ** [[RA60]]
 ** [[RA70]]
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 ** [[RA92]]
-* SDI [[Solid State Disk]] Drives
+* SDI [[solid state disk]] drives
 ** [[ESE 20]]
 ** [[ESE 25]]

← Older revision		Revision as of 17:42, 31 August 2023
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	[[Category: DEC Mass Storage]]		[[Category: DEC Mass Storage]]
	[[Category: DEC Buses]]		[[Category: DEC Buses]]
		+	[[Category: SDI]]

← Older revision		Revision as of 11:59, 31 August 2023
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	[[Category: DEC Mass Storage]]		[[Category: DEC Mass Storage]]
		+	[[Category: DEC Buses]]

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 ==Technical details==
-The SDI drive to controller interconnect is a [[serial]] link which connects each drive directly (i.e. individually), or 'radially' (a term for such a device connection approach which DEC also used in its early machines), to its controller.
+The SDB drive to controller interconnect is a [[serial]] link which connects each drive directly (i.e. individually), or 'radially' (a term for such a device connection approach which DEC also used in its early machines), to its controller.
 Logically, at a higher layer, SDI consists of a protocol by which a controller can recognize a drive's characteristics, direct its mechanical operation, store data on or retrieve data from it, and recognize and recover from error conditions.

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-The '''Standard Disk Interconnect''' (usually referred to by the acronym, '''SDI'''; sometimes called the '''Standard Disk Interface''') is a [[Digital Equipment Corporation|DEC]] designed [[disk]] [[drive]] to [[device controller|controller]] interface offering high performance, availability, and configuration flexibility. These characteristics make it suitable for use with [[PDP-11]]s and with [[VAX]] single and multiple [[Central Processing Unit|CPU]] systems.
+The '''Standard Disk Interconnect''' (usually referred to by the acronym, '''SDI'''; sometimes called the '''Standard Disk Interface''') is a [[Digital Equipment Corporation|DEC]] designed [[disk]] [[drive]] to [[device controller|controller]] interface, intended to support large [[mass storage]] devices. It is a key element of the [[Digital Storage Architecture]] (DSA), used with [[PDP-11]]s and with [[VAX]] single and multiple [[Central Processing Unit|CPU]] systems.
-== SDI Family of DSA Products ==
+A new standard, it was introduced (in 1981) because no existing standard had the capabilities that DEC deemed necessary in the mass storage arena. SDI claims to offer high performance, availability, and configuration flexibility, and does so across a large range of configurations (ranging from small individual systems, to groups of large [[server]]s.
-The family of [[Digital Storage Architecture|DSA]] products which implement the SDI consists of:
+A variant, the [[Standard Tape Interconnect]] (STI), is used with [[magnetic tape]] systems, and other sequential storage applications. It shares its physical connection technology (called the [[Standard Drive Bus]], SDB) with SDI; the higher layer [[protocol]]s are adapted to sequential storage needs.
 * SDI Disk controllers:
 ** [[KDA50]] ([[QBUS]])
 ** [[KDB50]] ([[VAX Bus Interconnect|VAXBI]])
 ** [[KDM70]] ([[Extended Memory Interconnect|XMI]])
 * SDI [[Hierarchical Storage Controller]]s (HSCs):
@@ Line 36: / Line 59: @@
 ** [[ESE 25]]
 ** [[ESE 50]]
 ==Further reading==
 * ''Digital Storage Technology Handbook'', 1989 (EC-H0374-45/89) - Chapter 4, The Digital Storage Interconnects
 ==External links==

← Older revision		Revision as of 21:03, 28 September 2022
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	Logically, SDI consists of a [[protocol]] by which a controller can recognize a drive's characteristics, direct its mechanical operation, store data on or retrieve data from it, and recognize and recover from error conditions.		Logically, SDI consists of a [[protocol]] by which a controller can recognize a drive's characteristics, direct its mechanical operation, store data on or retrieve data from it, and recognize and recover from error conditions.
		+
		+	==Further reading==
		+
		+	* ''Digital Storage Technology Handbook'', 1989 (EC-H0374-45/89) - Chapter 4, The Digital Storage Interconnects

	==External links==		==External links==