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RA71 disk drive - Revision history
2026-10-13T17:44:12Z
Revision history for this page on the wiki
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Jnc: /* External links */ Manx mirror of HDS is gone
2026-10-11T21:39:16Z
<p><span class="autocomment">External links: </span> Manx mirror of HDS is gone</p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><!-- * [http://bitsavers.org/pdf/dec/disc/ra70/ ra70] - documentation at [[Bitsavers]] --></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><!-- * [http://bitsavers.org/pdf/dec/disc/ra70/ ra70] - documentation at [[Bitsavers]] --></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [https://<del style="font-weight: bold; text-decoration: none;">manx-docs</del>.<del style="font-weight: bold; text-decoration: none;">org</del>/<del style="font-weight: bold; text-decoration: none;">collections</del>/mds-199909/cd3/disk/rsa7xpg2.pdf RA7x/SA7x Pocket Reference Guide] (EK–RSA7X–PG–002)</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [https://<ins style="font-weight: bold; text-decoration: none;">vt100</ins>.<ins style="font-weight: bold; text-decoration: none;">net</ins>/<ins style="font-weight: bold; text-decoration: none;">mirror</ins>/mds-199909/cd3/disk/rsa7xpg2.pdf RA7x/SA7x Pocket Reference Guide] (EK–RSA7X–PG–002)</div></td></tr>
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Jnc: New sub-cat
2023-08-31T08:30:46Z
<p>New sub-cat</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:30, 31 August 2023</td>
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Jnc: Jnc moved page RA71 to RA71 disk drive: Formal DEC name
2023-08-17T20:14:10Z
<p>Jnc moved page <a href="/wiki/RA71" class="mw-redirect" title="RA71">RA71</a> to <a href="/wiki/RA71_disk_drive" title="RA71 disk drive">RA71 disk drive</a>: Formal DEC name</p>
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Jnc: Fill out the set
2023-08-17T18:43:24Z
<p>Fill out the set</p>
<p><b>New page</b></p><div>{{Infobox Disk drive<br />
| name = RA71<br />
| manufacturer = [[Digital Equipment Corporation|DEC]]<br />
<!-- | year introduced = 198x --><br />
| controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]]<br />
| capacity = 700 Mbytes (formatted)<!-- <br>350 Mbytes (unformatted)<br />
| transfer rate = 1.4 Mbytes/sec<br />
| average access time = 27 msec<br />
| rpm = 4000<br />
| revolution time = 7.5 msec<br />
<!-- | one track seek = x msec<br />
| average seek = 19.5 msec<br />
<!-- | maximum seek = x msec --><br />
| surfaces = 14 data, 1 servo<br />
| number of heads = 14 data,<br>1 servo<br />
<!-- | tracks = 1507<br />
| sectors = 34<br />
| bytes per sector = 512<br />
| tracks per inch = 1355<br />
| density = 22,437<br />
<!-- | recording method = [[Modified Frequency Modulation|MFM]]<br />
| start time = 59 secs (avg)<br />
| stop time = 15 secs (avg)<br />
| physical size = 9cm x 14.6cm x 22.4cm<br />
| weight = 10.5 lbs<br />
| power consumption = 264 watts (idle) --><br />
}}<br />
<br />
The '''RA71 disk drive''' is a [[Standard Disk Interconnect]] [[non-removable-media disk]] drive from [[Digital Equipment Corporation|DEC]]. Unlike almost all the other RA-series drives, it is a compact width - 5.25 inches wide. It has no internal [[power supply]]; it gets its power from the host system, or its SA7x enclosure. <br />
<br />
Its capacity was 700 Mbytes (formatted). It was internally operated by a [[microprocessor]]. <br />
<br />
{{stub}}<br />
<br />
==Further reading==<br />
<br />
* ''RA7x Disk Drive Service Manual'' (EK–ORA7X-SM) - not available online<br />
<br />
==External links==<br />
<br />
<!-- * [http://bitsavers.org/pdf/dec/disc/ra70/ ra70] - documentation at [[Bitsavers]] --><br />
* [https://manx-docs.org/collections/mds-199909/cd3/disk/rsa7xpg2.pdf RA7x/SA7x Pocket Reference Guide] (EK–RSA7X–PG–002)<br />
<br />
[[Category: MSCP Disk Drives]]<br />
[[Category: DEC Non-removable-media Disks]]</div>
Jnc