Mac Plus SCSI enclosure

[theodric]

Greetings! Can anyone recommend specific* external SCSI enclosures that are known working with the Plus?

Here's why I ask: my Plus only wants to talk to one particular drive (an Apple 40MB unit pulled from my SE/30) in one particular enclosure (a no-name beige rectangle with a pair of HD50 connectors on it, one properly terminated of course, which has circuit boards for passing the signal to the drive cable, rather than being a simple 3-connector cable in a housing). It fails to see any other drives installed in that box, however. If I connect the same working drive in e.g. a LaCie enclosure with two Centronics ends, again one terminated, the little box never sees the drive. The LaCie box works fine on the SE/30 with whatever installed. So do any other drives in the no-name box. EVERYTHING works fine on the SE/30. Nary a complaint.

I'm aware of the Plus' finicky SCSI implementation, but I had hoped that my latest purchase - a CF AztecMonster developed with the Plus in mind - would be less troublesome when combined with the known-working box, termination power jumpered on, and a SCSI cable modified with RST removed according to its creator's specifications-- but no luck. I've also tested the available permutations of TERMPWR and RST en/disablage for good measure. I'd just write the system off as having dodgy SCSI hardware, except that, dammit, it still works fine with the noisy ol' Apple 40MB drive!

:?: DOES NOT COMPUTE

*and preferably obtainable - I'd love to run across a 20SC, but have seen none in 4 months' looking

 

[theos911]

I can can get you in contact with people with a 20SC in Sweden. I'd like to get one, but I can't pay the shipping from Sweden to the US. Let me know if you are interested.

 

[theodric]

I'm definitely interested, that would be fantastic!

 

[24bit]

You already did format a drive in the LaCie box with interleave 1:3, I suppose?

I hardly can believe its an enclosure issue. I had such 40MB 5,25 inch drives in my MacII.

I think those are just slow enough for a Plus. Newer drives must be slowed down in order to talk to a Plus.

 

[theodric]

You already did format a drive in the LaCie box with interleave 1:3, I suppose?I hardly can believe its an enclosure issue. I had such 40MB 5,25 inch drives in my MacII.

I think those are just slow enough for a Plus. Newer drives must be slowed down in order to talk to a Plus.

Wish I could, but stuff totally fails to show up on the bus, or when it does I end up with A/UX HD SC Setup bombing :-/

 

[tt]

Can anyone recommend specific* external SCSI enclosures that are known working with the Plus?

I used a Rodime 20 Plus that was purchased with my Mac Plus for many years.

 

[applefreak]

mac plus with scsi HD inside

20MB MiniScribe

closed

 

[24bit]

Could you try LIDO on your SE/30 and the LaCie box to set the interleave maybe?

LIDO 3.X used to be on Macintoshgarden, but the site is down (again).

I might look if I stored it locally, in case you would like to try.

I offered my old (SCSI) devices here for costs of shipping:

http://www.macdomain.org/index.php?topic=464.0

Such a Syquest beast might be suitable for a Plus.

 

[theodric]

I'll give it a shot, er, tomorrow Playing with my new iPad tonight!

applefreak, that's an awesome internal drive setup! I like how it piggybacks on the external port without damaging the case/board.

 

[jonathan]

These external SCSI enclosures and drives seem to work fine with my Plus:

>POWERUSER with an Apple logo'd 40MB Quantum ProDrive LPS 3.5" hdd, EPROM ©1990.

>MACBOTTOM SCSI by Personal Computer Peripherals Corp. with an Apple logo'd 40MB Quantum ProDrive LPS 3.5" hdd, EPROM ©1990.

>generic enclosure with a Maxtor 7290SR 3.5" hdd, unclear about the size (in "get info" the Size reads 58.7 MB on disk (61,581,312 bytes used).

>generic enclosure with a Seagate ST-296N 5.25" 85MB hdd (this thing is loud and old, I think its circa 1988).

You could always setup a Zip 100 MB drive to act as a hdd for your plus!

As a side note, I am attempting to fix an Apple Hard Disk 40SC with a 5.25" Quantum Q250 40MB -- see the video here of the horrible sound it makes when powered up:

http://youtu.be/TfZLLiu38rs

The power supply seems to be ok, it measures a steady +11.75v/+5.11v with the drive connected. Ideally I would like to replace it with a newer Quantum ProDrive ELS Internal 3.5 Inch HDD 160MB SCSI (Firmware ©1993), but I am having trouble getting my Plus to boot up and recognize it. I also tried all versions of Apple's Drive Setup 1.0.5-1.7.3 on a PowerMac 6100, but it says there is "no disk" at the SCSI address of the drive.