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Second hard drive

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Wheathampstead Brko

Wheathampstead Brko

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Hardware...I despise hardware...

Despite knowing this I managed to salvage two internal hard-drives from some unwanted PCs at my school, not even sure they work! Seeing as I only have 32 meg of free space its about time I got down and dirty with it in the hope that these will do the job.

Right - here's the issue - I have these two hard-drives. On one the lable says it does have a jumper BUT next to it is "Master - ON, Slave - OFF" The other, which is MUCH older judging by the exposed PCB and poor spec, has no jumper info at all. Thats all the info I really have on them...

What I want to know is how the whole Master/Slave thing works. As far as I am aware you can set it via the IDE cable but that may only be on newer machines, this is from 2001. Is the whole jumper thing gonna make this a big no-go? If it does work how arduous is the configuration process? I am told very! I always assumed there was a nice, easy switch on the disk itself and then the good old OS would take over, alas I was wrong.

If this were to be a no go I was wondering if there would be anything stopping me buying an enclosure and using one of these externally

System spec:

Late 2001
900MHz Processor
128KB Cache
256 PC100 168 pin RAM (from 128)
20GB HDD - pretty much full
Running XP

The info I have on the two hard-drives

1 - "Caviar 22100 AT compatible intelligent drive" (the older one)

Parameters - 4092 cylinders, 16 heads, 63 sectors

2 - Newer of the two, claiming to not support slave operation

Parameters - 16383 cylinders, 16 heads, 63 sectors

Jumper - J50
Master/Single - On
Slave - Off

My own knowledge

Know my stuff with general use and taking Computing at A-Level so I do know my stuff. Hardware knowledge is limited, don't really like to get down with it for fear of breaking something and having to live PC-less!

Apreciate any help, sorry to be a bit thick on the hardware side of things

Edited by Wheathampstead Brko, 18 August 2007 - 06:03 AM.

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I will try and make this simple while I look for some info.
A unit with 2 drives is a dual unit. (of course you can also have 3 or more drives).
If you have 1 ribbon cable, the master © would be on the end. The slave would be in the middle.

Now the interesting part. If your computer supports cable select, each drive would be jumpered "csel" (cabel select) and the computer would find the correct drive in the correct spot. Not knowing (and usually no one does) you have to start some where.
Sometimes it requires 80 core ribbon instead of the older 40 core.

Since the master is on the end of the cable, you can change the jumper on that drive to be in the master location.
You then place the 2nd hard drive jumper in the slave position. The 2nd drive goes in the middle of the cable.

If you can get to your existing drive and look at the label/ pin jumbers, you can determine how it is jumpered. A label/ model can be used to do a search for the info.

The caviar drive has the following specs for the jumpers.

J2 J8 J3
|o o o o o o o o o o o o o o o o o o o o| |o o o||O O O O|
|o o o o o o o o o o o o o o o o o o o| |o o o||4 3 2 1|
| | | +12V
(Pin 20 keyed) | | +- GND
| +--- GND
+----- +5V

WESTERN AC11000/22100/32500/33100 TECH.REF.MANUAL 79-860023-000 7/96

Jumper setting

J8 Master/Slave/Cable Select Configuration

+5-3-1+ Single (Neutral Position)
|xxx o| Factory default. The jumper in this position has no effect
|o o o| on single hard drive configurations.

+5-3-1+ Single Drive +5-3-1+ Master Drive
|o o o| Configuration |X o o| Configuration
|o o o| |X o o| (Dual Drives)
+6-4-2+ +6-4-2+

+5-3-1+ Slave Drive
|o X o| Configuration
|o X o| (Dual Drives)

+5-3-1+ Cable Select
|o o X| Configuration
|o o X| (Dual Drives)

Pins 1 and 2 are reserved; do not jumper!

The Caviar can be assigned as either a single, master, or slave

Caviar drives are shipped with a jumper shunt in the neutral storage
position (across pins 5 and 3).

Cable Select (CSEL) - Caviar also supports the CSEL signal on the
drive cable as a drive address selection. Place a jumper shunt on
pins 1-2 to enable this option. When enabled, the drive address is 0
(Master) if CSEL is low, or 1 (Slave) if CSEL is high.

Do not install the CSEL jumper shunt when installing the Caviar drive
in systems that do not support the CSEL feature.

You can read about your drive at the following link, and seethe jumper layout better.
The copy/paste of the jumpers seems to be jumbled up in the preview.

Basicly, you need to try the jumpers as cable select AND as master/ slave.

On the other drive, did you determine the jumper configuration?
If so, you can do the same thing.

EDIT FOR CLARITY: The j8 jumper for the master/slave is as follows.

master : place a jumper on the far left 2 pins (top to bottom)
slave : place the jumper on the middle 2 pins (top to bottom)
cable select: place the jumper on the far right 2 pins (top to bottom) this option may not be available in your bios to use this selection.

Edited by 123Runner, 19 August 2007 - 07:19 AM.

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Wheathampstead Brko

Wheathampstead Brko

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Right, I'm pretty sure I get that, thanks a lot for taking the time

I took a look inside earlier and found that the IDE has only one head, so I rashly went out and bought an external which currently refuses to work. From one problem to another... http://www.geekstogo...ng-t168025.html
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