Apple Hard Disk 160SC
| Apple Hard Disk 160SC | |
|---|---|
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|
| Apple's drawing of the case shared by the 20SC, 40SC, 80SC and 160SC | |
| Manufacturer | Apple Computer, Inc. |
| Type | External SCSI hard disk drive |
| Interface | SCSI, external DB-25 port of the Macintosh |
| Compatible | Macintosh Plus, Macintosh SE, Macintosh SE/30, Macintosh II, Macintosh IIx, Macintosh IIcx |
| Dimensions | 246 × 78 × 266 mm (9.7 × 3.1 × 10.5 in) |
| Weight | 4.3 kg (9.5 lb) |
| Power | 85-270 V AC, 47-64 Hz, 60 W maximum |
| Storage | 160 MB formatted |
The Apple Hard Disk 160SC is Apple's 160 MB external SCSI hard disk. It uses the case of the 20SC, 40SC and 80SC, with some parts of its own.[1] It connects directly to the external SCSI port of the Macintosh Plus, SE, SE/30, II, IIx and IIcx.[2] Inside is a half-height 5.25-inch drive; Apple sold the same 160 MB mechanism as an internal option for the Macintosh II and IIx.[3] The case, take-apart and repair are covered on Apple Hard Disk SC General Maintenance and Apple Hard Disk SC Troubleshooting Guide.
Apple's 1994 Apple External Hard Drive, built by La Cie, also came in a 160 MB model with "160SC" on its front panel. It is a different, later drive in a vertical case.[4]
Specifications
[edit | edit source]| Item | Value |
|---|---|
| Formatted capacity | 160 MB |
| Data surfaces | 5, one head per surface |
| Block size | 512 bytes |
| Total blocks | 327,780 |
| Blocks per track | 32 to 54 |
| Average seek time | 18 ms |
| Rotational speed | 3,600 rpm |
| Start-up and spin-down | 20 s each |
| Line voltage | 85-270 V AC, 47-64 Hz |
| Maximum power | 60 W |
| Operating temperature | 10-40 °C (50-104 °F) |
| Storage temperature | 0-50 °C (32-122 °F) |
| Relative humidity | 20-80 %, non-condensing |
| Height × width × depth | 7.8 × 24.6 × 26.6 cm (3.1 × 9.7 × 10.5 in) |
| Weight | 4.3 kg (9.5 lb) |
Differences from the smaller models
[edit | edit source]Apple's parts list gives the 160SC its own versions of several case parts: a platinum case top (630-5802), case bottom (630-5647), hard disk frame (805-5081), an end bracket with the LED cable (076-0380), fan (699-5017) and drive-to-case cable (590-4037). The external 160 MB hard disk assembly is 661-0584.[1]
- The LED cable comes off the end bracket with four screws, and Apple calls for a small Torx screwdriver for them.[1]
- Like the external 20 MB drive, the external 160 MB service module ships in a frame that fits the external case and needs no reconfiguring. Apple's other external modules have to be converted from their internal configuration first.[1]
- Apple also made a 3.5-inch 160 MB drive (661-0625), but only as an internal drive for the Macintosh IIci and IIfx.[1]
Apple II
[edit | edit source]Apple's documents disagree on whether the 160SC works with an Apple II. The 1989 announcement article says it cannot be used with the Apple II family, and the drive matrix in Apple's 1991 service procedures marks the 160 MB drives as Macintosh only.[3][1] The same service procedures also say any Apple SCSI drive can be connected to an Apple II SCSI card, but that the four-partition limit of ProDOS leaves much of a 160SC's capacity out of reach.[1]
Termination
[edit | edit source]A Tech Info Library article describes a Macintosh IIci with an internal drive that would not start once an external Apple 160 MB drive was added, although a 40 MB drive worked in its place. Apple's suggestions were to switch the external drive on before the Macintosh, set its SCSI ID to a number from 1 to 6, try it on another Macintosh without an internal drive, and swap the cable and terminator.[5]
Documentation
[edit | edit source]- Apple Service Technical Procedures Cross Family Peripherals Volume One: Apple's service procedures for the SCSI hard disk drives, including the 160SC.[1]
- Apple External Hard Drive SC Service Source: the later take-apart volume for the 20SC to 160SC case.
Related pages
[edit | edit source]- Apple Hard Disk SC General Maintenance
- Apple Hard Disk SC Troubleshooting Guide
- Apple Hard Disk SC Capacitor Replacement Guide
- Apple Hard Disk 20SC
- Apple Hard Disk 40SC
- Apple Hard Disk 80SC
- Apple External SCSI Hard Drive
References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Apple Computer, Apple Service Technical Procedures, Cross Family Peripherals, Volume One (PN 072-0230, 1991), SCSI Hard Disk Drives chapter, hosted as File:Apple Service Technical Procedures Cross Family Peripherals Volume One Apr 1991.pdf and described at Apple Service Technical Procedures Cross Family Peripherals Volume One. Basics, p. 1.3 (PDF p. 178): drive matrix and the 3.5-inch 160 MB drive in the IIfx and IIci; p. 1.10 (PDF p. 185): the four-partition limit; Take-Apart, pp. 2.2-2.3, 2.10 and 2.17 (PDF pp. 188-189, 196, 203): service modules and the LED cable; Illustrated Parts List, IPL.3, IPL.5 and IPL.9 (PDF pp. 256, 258, 262).
- ↑ 2.0 2.1 Apple Computer, "Apple HD 160SC: Specifications (Discontinued)", Tech Info Library article 6949, created 14 March 1991, revised 13 September 1993, in the archive.org collection Apple's Technical Information Library Articles, https://archive.org/details/APPLE_TIL_ARTICLES, file TIL00001_to_TIL60496.zip. Source for every figure in the specification table and the list of Macintosh models.
- ↑ 3.0 3.1 Apple Computer, "5.25-Inch 160MB SCSI Hard Disk Drive", Tech Info Library article 3514, copyright 1989, revised 11 April 1991, APPLE_TIL_ARTICLES collection (archive.org), file TIL00001_to_TIL60496.zip. Source for the half-height 5.25-inch form factor, the internal option in the Macintosh II and IIx, testing with the Macintosh OS and A/UX, the statement that the drive cannot be used with the Apple II family, and the 1.25 MB/s transfer rate.
- ↑ La Cie, Ltd., advertisement for the Apple External Hard Drive, 1994, hosted as File:Apple External Hard Drive advertisement (1994).jpg.
- ↑ Apple Computer, "SCSI Termination and External Hard Drives", Tech Info Library article 8140, created 14 May 1991, revised 6 September 1991, APPLE_TIL_ARTICLES collection (archive.org), file TIL00001_to_TIL60496.zip.
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