Difference between revisions of "RS11 disk drive"
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{{Infobox Disk drive | {{Infobox Disk drive | ||
| − | | name = | + | | name = RS11 |
| manufacturer = [[Digital Equipment Corporation]] | | manufacturer = [[Digital Equipment Corporation]] | ||
| capacity = 524 KB | | capacity = 524 KB | ||
| − | | media = single nickel-cobalt plated surface | + | | minimum access time = 258 16 μsec |
| − | | | + | | average access time = 16.9 msec (60 Hz [[alternating current|AC]] power)<br>20.3 msec (50 Hz) |
| − | | controller = [[RF11]] ([[UNIBUS]]) | + | | maximum access time = 33.6 msec (60 Hz)<br>40.3 msec (50 Hz) |
| + | | transfer rate = 125 KB/sec<br>16 μsec/word (60 Hz)<br>19.2 μsec/word (50 Hz) | ||
| + | | media = single fixed nickel-cobalt plated surface | ||
| + | | rpm = 1800 (60 Hz) | ||
| + | | surfaces = 1 | ||
| + | | tracks = 128 | ||
| + | | density = 1900 bits/inch | ||
| + | | recording method = [[Non Return to Zero Inverted|NRZI]] | ||
| + | | power consumption = 6.5A (operating)<br>14A (starting) | ||
| + | | controller = [[RF11 disk controller|RF11]] ([[UNIBUS]]) | ||
|}} | |}} | ||
| − | The RS-11 is a fixed-platter fixed-head disk drive | + | The RS-11 is a fixed-platter [[fixed-head disk]] [[drive]] which could store up to 524KB of data, addressable on 16 bit [[word]] boundaries (most other DEC disk drives of this era used 512 byte blocks). The drive used 128 fixed read/write [[head]]s, and recorded data on a single nickel-cobalt plated surface. |
| − | Its controller | + | It provided one [[parity]] bit per word; data words are stored in a 22-bit format, with guard bits (2 at the start, and 2 at the end) and a [[sync]] bit. A spare set of 3 timing tracks, recorded in [[phase]] with the primaries, provided redundancy for the 3 primaries.. |
| + | |||
| + | It was packaged for rack mounting in a standard 19 inch rack, such as an [[H960 rack|H960]]. Its controller was the [[RF11 disk controller]] (also rack mounted). | ||
| + | |||
| + | [[Category: DEC Early Disk Drives]] | ||
| + | [[Category: DEC Fixed-head Disks]] | ||
Latest revision as of 21:14, 14 August 2023
| RS11 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Drive Controller(s): | RF11 (UNIBUS) |
| Capacity: | 524 KB |
| Transfer Rate: | 125 KB/sec 16 μsec/word (60 Hz) 19.2 μsec/word (50 Hz) |
| Minimum Access Time: | 258 16 μsec |
| Average Access Time: | 16.9 msec (60 Hz AC power) 20.3 msec (50 Hz) |
| Maximum Access Time: | 33.6 msec (60 Hz) 40.3 msec (50 Hz) |
| Revolutions per Minute: | 1800 (60 Hz) |
| Media: | single fixed nickel-cobalt plated surface |
| Total Surfaces: | 1 |
| Tracks per Surface: | 128 |
| Density: | 1900 bits/inch |
| Recording Method: | NRZI |
| Power Consumption: | 6.5A (operating) 14A (starting) |
The RS-11 is a fixed-platter fixed-head disk drive which could store up to 524KB of data, addressable on 16 bit word boundaries (most other DEC disk drives of this era used 512 byte blocks). The drive used 128 fixed read/write heads, and recorded data on a single nickel-cobalt plated surface.
It provided one parity bit per word; data words are stored in a 22-bit format, with guard bits (2 at the start, and 2 at the end) and a sync bit. A spare set of 3 timing tracks, recorded in phase with the primaries, provided redundancy for the 3 primaries..
It was packaged for rack mounting in a standard 19 inch rack, such as an H960. Its controller was the RF11 disk controller (also rack mounted).
