R80 Disk Drive - Revision history

Jnc: New sub-cat

2023-08-31T09:10:33Z

New sub-cat

← Older revision		Revision as of 09:10, 31 August 2023
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	[[Category: MASSBUS Disk Drives]]		[[Category: MASSBUS Disk Drives]]
	[[Category: ~~MSCP~~ Disk Drives]]		[[Category: SDI Disk Drives]]
	[[Category: DEC Non-removable-media Disks]]		[[Category: DEC Non-removable-media Disks]]

Jnc: Jnc moved page R80 to R80 Disk Drive: Formal DEC name

2023-08-16T12:38:14Z

Jnc moved page R80 to R80 Disk Drive: Formal DEC name

← Older revision	Revision as of 12:38, 16 August 2023
(No difference)

Jnc: DEC formal name

2023-08-16T12:37:55Z

DEC formal name

← Older revision		Revision as of 12:37, 16 August 2023
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	The '''R80''' is a [[non-removable-media disk]] drive from [[Digital Equipment Corporation\|DEC]]; its capacity was 124 Mbytes. It could support either 16- or 18-bit words, and was internally operated by a [[microprocessor]] which used 32-bit burst [[error-correcting code\|ECC]] to invisibly repair simple data errors.		The '''R80 Disk Drive''' is a [[non-removable-media disk]] drive from [[Digital Equipment Corporation\|DEC]]; its capacity was 124 Mbytes. It could support either 16- or 18-bit words, and was internally operated by a [[microprocessor]] which used 32-bit burst [[error-correcting code\|ECC]] to invisibly repair simple data errors.

	It apparently had several options for how it connected to the system, and was identified differently depending on which one was used, as follows:		It apparently had several options for how it connected to the system, and was identified differently depending on which one was used, as follows:

Jnc: Can't locate much on it, but here's what I could find

2023-08-16T12:36:13Z

Can't locate much on it, but here's what I could find

New page

{{Infobox Disk drive
| name = R80
| manufacturer = [[Digital Equipment Corporation|DEC]]

| capacity = 124 Mbytes
| transfer rate = 1.2 Mbytes/sec

| rpm = 3600
| revolution time = 8.3 msec
| one track seek = 6 msec
| average seek = 25 msec
| maximum seek = 50 msec
| surfaces = 7 data, 1 servo
| number of heads = 14 data,<br>1 servo (read-only)
| tracks = 561
| sectors = 30 (18 bit words)<br>31 (16 bit words)
| words per sector = 256
| tracks per inch = 478
| density = 6339 (max; inner track)
| recording method = [[Modified Frequency Modulation|MFM]]
| start time = 20 secs (avg);<br>40 secs (max)
| stop time = 9 secs (avg);<br>13 secs (max)
| physical size = 26cm x 44cm x 67cm
| weight = 135 lbs (approx)
| power consumption = 575 watts
}}

The '''R80''' is a [[non-removable-media disk]] drive from [[Digital Equipment Corporation|DEC]]; its capacity was 124 Mbytes. It could support either 16- or 18-bit words, and was internally operated by a [[microprocessor]] which used 32-bit burst [[error-correcting code|ECC]] to invisibly repair simple data errors.

It apparently had several options for how it connected to the system, and was identified differently depending on which one was used, as follows:

* an R80 connected to the system through a [[MASSBUS]] adapter (MBA) was denominated an [[RM80 Disk Drive|RM80]];
* an R80 connected to the system through the [[Standard Disk Interconnect]] (SDI) bus was denominated an [[RA80 Disk Drive|RA80]];
* an R80 connected to a [[VAX-11/730]] through an [[RB730 Integrated Disk Controller]] was denominated an '''RB80'''. (An RB730 can have a maximum of four drives; at most one can be an RB80.)

==External links==

* [http://bitsavers.org/pdf/dec/disc/r80/ r80] - documentation at [[Bitsavers]]
** [http://bitsavers.org/pdf/dec/disc/r80/EK-00R80-UG-001_R80_Disk_Drive_Users_Guide_Apr82.pdf R80 Disk Drive User's Guide] (EK-00R80-UG-001)

[[Category: MASSBUS Disk Drives]]
[[Category: MSCP Disk Drives]]
[[Category: DEC Non-removable-media Disks]]