RA60 Disk Drive: Difference between revisions
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| manufacturer = [[Digital Equipment Corporation]] | | manufacturer = [[Digital Equipment Corporation]] | ||
| year introduced = 1982 | | year introduced = 1982 | ||
| controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]]| capacity = 205 Mbytes (formatted) | | controller = [[Standard Disk Interconnect#SDI Family of DSA Products|all SDI controllers]] | ||
| capacity = 205 Mbytes (formatted) | |||
| transfer rate = 1.3 Mbytes/sec | | transfer rate = 1.3 Mbytes/sec | ||
| average access time = 50 msec | | average access time = 50 msec | ||
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}} | }} | ||
[[Image:open ra60.jpg|thumb|200px|left|An open RA60]] | |||
''RA60 Disk - | The '''RA60 Disk Drive''' is a [[Digital Equipment Corporation|DEC]] [[Standard Disk Interconnect|SDI]] [[removable-pack disk]] drive, introduced in 1982. It is the only removable-pack drive in the RAxx group of drives; the others ([[RA70]], etc) are all [[non-removable-media disk]] drives. | ||
[[ | It uses the RA60-P [[pack]], which has a five platters, with six data surfaces; the two end platters are purely protective. Track servo information is pre-recorded on the data surfaces; the servo information is recorded at manufacturing time. | ||
= 4.3 BSD disktab = | The RA60 can also be connected in a dual-[[hardware port|port]] arrangement, permitting its use by two [[device controller|controllers]]. | ||
Quote from the combined DEC RA60/RA80/RA81 1982 sales brochure: | |||
''The RA60 is the industry's highest capacity and lowest price-per-megabyte rack mounted, removable media disk. With 205 megabytes of user formatted capacity, 615 megabytes are available in a 42-inch high cabinet - 50% more than any other removable media product. The RA60 provides 205 megabytes of removable media flexibility for $15,000.'' | |||
==4.3 BSD disktab== | |||
<pre> | <pre> | ||
ra60|RA60|DEC RA60 Removable:\ | ra60|RA60|DEC RA60 Removable:\ | ||
| Line 26: | Line 33: | ||
:ph#268772:bh#4096:fh#1024: | :ph#268772:bh#4096:fh#1024: | ||
</pre> | </pre> | ||
{{semi-stub}} | |||
==Further reading== | |||
* ''RA60 Disk Drive User Guide'' (EK-0RA60-UG-001 - not available online) | |||
* ''RA60 Disk Drive Service Manual'' (EK-0RA60-SV-002 - not available online) | |||
==External links== | |||
* [http://bitsavers.org/pdf/dec/disc/ra60/ ra60] - documentation at [[Bitsavers]] | |||
** [http://bitsavers.org/pdf/dec/disc/ra60/EK-0RA60-SV-001_May83.pdf RA60 Disk Drive Service Manual] (EK-0RA60-SV-001l | |||
* [https://manx-docs.org/collections/hcps/m880btc.pdf RA60 Maintenance Guide] (AA-M88OB-TC) | |||
[[Category: MSCP Disk Drives]] | [[Category: MSCP Disk Drives]] | ||
[[Category: DEC Removable-pack Disks]] | [[Category: DEC Removable-pack Disks]] | ||
Revision as of 00:52, 16 August 2023
| RA60 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Year Introduced: | 1982 |
| Drive Controller(s): | all SDI controllers |
| Capacity: | 205 Mbytes (formatted) |
| Transfer Rate: | 1.3 Mbytes/sec |
| Average Access Time: | 50 msec |
| Revolutions per Minute: | 3600 1/min |
| One Track Seek Time: | 6.7 msec |
| Average Seek Time: | 41.7 msec |
The RA60 Disk Drive is a DEC SDI removable-pack disk drive, introduced in 1982. It is the only removable-pack drive in the RAxx group of drives; the others (RA70, etc) are all non-removable-media disk drives.
It uses the RA60-P pack, which has a five platters, with six data surfaces; the two end platters are purely protective. Track servo information is pre-recorded on the data surfaces; the servo information is recorded at manufacturing time.
The RA60 can also be connected in a dual-port arrangement, permitting its use by two controllers.
Quote from the combined DEC RA60/RA80/RA81 1982 sales brochure:
The RA60 is the industry's highest capacity and lowest price-per-megabyte rack mounted, removable media disk. With 205 megabytes of user formatted capacity, 615 megabytes are available in a 42-inch high cabinet - 50% more than any other removable media product. The RA60 provides 205 megabytes of removable media flexibility for $15,000.
4.3 BSD disktab
ra60|RA60|DEC RA60 Removable:\
:ty=removable:ns#42:nt#4:nc#2382:\
:pa#15884:ba#8192:fa#1024:\
:pb#33440:pc#400176:\
:pg#82080:bg#4096:fg#512:\
:ph#268772:bh#4096:fh#1024:
Further reading
- RA60 Disk Drive User Guide (EK-0RA60-UG-001 - not available online)
- RA60 Disk Drive Service Manual (EK-0RA60-SV-002 - not available online)
External links
- ra60 - documentation at Bitsavers
- RA60 Disk Drive Service Manual (EK-0RA60-SV-001l
- RA60 Maintenance Guide (AA-M88OB-TC)
