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I'm trying to get data off a 2.5 inch hard drive from an old laptop (a Macintosh PowerBook Duo 230), the drive is model: WDS-2120

Drive connector

It looks like a standard mini-IDE hard drive, except it only has 40 pins then a break and 8 additional pins -I would guess these 8 for jumpers. Instead of the normal missing 20 pin, the missing pin is in position 17.

Any suggestion on an adapter or the name of this connector type?

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    Does this answer your question? What is the connector on an old fashion IDE laptop called? – Stack Overflow is dead Feb 24 at 20:48
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    macintosh powerbook duo 230 – digarch Feb 24 at 21:15
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    @user1686: SCSI only needs 25 pins. On a 50-pin SCSI-2 ribbon connector (non differential) all odd (or even pins) are connected to ground. In fact Apple used to use a "special" SCSI cable with 25-pin D-Sub connectors (AKA a fully wired 25-pin serial cable) on both ends to connect external devices to early Macs (using the cable/connector shield as ground). And Commodore did the same with the Amiga A520 SCSI controller. I actually made my own adapter cable (50-pin ribbon to 25-D-sub) back in the day to attach several regular SCSI drives to my A520 as external drives. The thing still works. – Tonny Feb 25 at 9:35
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    @Mark fair point - doesn't change the "lack of research effort" – Criggie Feb 26 at 0:07
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    A hard disk recovery service might get the data off at a very reasonable price, seeing as it is a working drive. – Andrew Morton Feb 26 at 16:39
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This is a PowerBook special and is not a PATA/IDE connector at all. It's a SCSI connector! Apparently a very custom SCSI connector that isn't really supported elsewhere, though it appears to be electrically (if not mechanically) compatible with standard SCSI-2 so an adapter is possible.

Some more info at: http://vintagemacmuseum.com/reading-powerbook-2-5-scsi-hard-drives/

There's some discussion over at https://68kmla.org/forums/index.php?/topic/31589-40p-scsi-to-50p-scsi/

There are also devices available that emulate such a drive (using a SD card as backing storage). Note the pinout in the photo matches your drive.

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    @Baldrickk As with many laptops, especially of that era, there probably weren't many, if any, actual standard options. I'm not entirely sure this wasn't actually a standard, either, but if it was ... it certainly wasn't particularly popular or common. – Bob Feb 25 at 12:45
  • What's the difference between electrically and mechanically compatible? – Prometheus Feb 25 at 13:41
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    @Hashim "Mechanically compatible" would mean that a standard SCSI-2 connector would fit the drive. "Electrically compatible" means that while a standard connector won't physically fit, an adapter could be made to connect to a SCSI-2 interface, because all of the required signals/pins are available. – Shamtam Feb 25 at 13:49
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    @Bob a standard of some type, sure. But like you say, not a common one. The other example that comes to mind is the iMac circa 2012 (I think) - the HDDs used in that are identical to "standard" SATA drives (in fact, an identical "standard" SATA drive was made by the manufacturer, which I believe was Seagate) but the apple drive had a unique temperature sensor connection instead of using SMART. "standard" drives did not have this connection, so unless you bought the apple version at a markup, no temperature would be sensed and fans would run at max speed in the normally quiet machine. – Baldrickk Feb 25 at 15:26
  • Update: I purchased this adapter from the vintagemacmuseum post (cablesonline.com/25lapscsihar.html) and it looks like it would work if part of the drive didn't stick out to meet the edge of the pins. The adapter plugs in halfway before the adapter board hits the edge of the drive. I think it's time to contact a recovery service. Thanks for all your help!! – digarch Mar 6 at 15:20
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According to EveryMac the laptop you mentioned uses a SCSI connector for its internal drive connections.

Standard Hard Drive: 80 MB, 120 MB* Int. HD Interface: SCSI

Details: *By default, this model is equipped with an 80 MB or 120 MB internal SCSI hard drive.

Emphasis mine.

The 8 pins to the left of your image will probably be used to indicate the SCSI ID of the drive, normally using jumpers. The original version of SCSI could daisy-chain up to 8 devices.

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It's SCSI. The 8 pins on the left are for power. There are no jumper pins; SCSI auto-negotiates. You can get devices like EX Connect to hook it up to a machine.

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    This is true for SCSI adapters after about 1998 but in 1992, when this laptop was launched, SCSI devices needed jumper settings. – Burgi Feb 26 at 9:57

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