HD replacement in 20SC

elppa · 2017-02-02 08:47:35

Hi all,

I posted this on "Mac Rejuvenators" FB group, but then found this forum and it seems the audience is wider here -- so reposting.

I'm about to replace a SCSI disk in my 20sc drive which just failed with a LOT of noise.

I bought a SCSI disk (http://allegro.pl/show_item.php?item=6598122888) and an adapter like this one: http://allegro.pl/show_item.php?item=5653157120.

Hopefully they will work together, and with 20sc enclosure... Anyone has done this before? Any tips?

bobo68 · 2017-02-20 18:54:47

You have to try. These wide SCSI drives often have termination issues when used with the simpler adapters. There are others that terminate open lines.

I'd go for a more conservative SCSI drive - less RPM and size, SE (and not LVD), narrow (8 bit), maybe 50-pin - or something like the SCIS2SD. Also have a look at the power the drive needs. It shall not stress the old power supply too much.

elppa · 2017-03-23 09:43:38

Hi bobo68. With a delay, but thank you for the response. Now I'm updating this thread for the record: yes, the setup which I asked about worked perfectly on Macintosh SE. The only problem I encountered was software-related: neither the regular Apple SC HD Setup, nor the patched version of it (!) could recognize the SCSI disk properly. But I managed to initialize and partition the disk using Lido 7.56. Now everything is working fine, the 36-gigabyte disk has 4 partitions, each around 2 Gigs. I didn't create more, because there's no chance I'll even fill the 4 I already have

Thanks again.

jt · 2017-03-23 16:08:29

If I need to upgrade mine, I'll be using something like this . . .

. . . from one of my IDE-> whatever adapters as a replacement power supply.

edit: unclear: it'd be hacked inside the case next to a SCSI2SD with the original PSU intact (stored in place) other than whatever needs to be unplugged/desoldered to hook the replacement up to the power switch. It should have plenty of juice to use a splitter to power a fan.

Last edited by jt (2017-03-23 16:16:32)

elppa · 2017-03-23 16:12:04

jt, if you are replacing the disk as I did, within the 80SC enclosure, then you don't need an external power supply -- the required Molex connector is available from the internal power supply.

jt · 2017-03-23 16:32:23

Yep, but I'd be taking the original power supply offline for "storage in place" with a reversible hack so as not put any more hours on it.

ThinkClassic

#1 2017-02-02 08:47:35

HD replacement in 20SC

#2 2017-02-20 18:54:47

Re: HD replacement in 20SC

#3 2017-03-23 09:43:38

Re: HD replacement in 20SC

#4 2017-03-23 16:08:29

Re: HD replacement in 20SC

#5 2017-03-23 16:12:04

Re: HD replacement in 20SC

#6 2017-03-23 16:32:23

Re: HD replacement in 20SC

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