Upgrading 6100's HD and CD

I forgot to mention one thing about the 6100. The case design makes it a virtual oven. Air is drawn in from the the few vents in the lid and is exhausted out the port on the bottom of the case. For best stability, place a 1-inch (25mm) spacer under each foot to give the exhaust port more room to work.

Mine will not run without the spacer blocks.

Allan

Welcome to the thread, Allan. Now how is the 8100 coming? lol

By the way, I tried the 80 pin SCSI drive and adapter and it worked well. It is hard to believe that the adapter cost more than the drive. They have several more 80 pin drives but I can not see spending that much on each adapter interface card. Those cards look like they would break easily if you were not careful.

Just a note: the 80 pin SCSI drives were designed to slide into a rack mount drive bay and not intended for use in the average computer.

Jim

Hi everyone!

I'll just put in my 2¢ and say that I have been successfully using my 6100/60 AV for a few years with an unpartitioned 3.8 GB SCSI drive loaded with OS 9.1.

That's all.

Those 80 pin drives were intended for a rack mount, into a rack with a backplane, AND the connector is designed to allow "Hot" swapping (with the power on). That is why the SCSI ID bits and some options moved to the backplane or adapter. You could replace a failed drive without powering down, and it got its address from the slot.

Mack,

Great news on your CD-ROM drive.

If you can find an external hard drive, or just a case, even if it is an external CD-ROM case that you open up and subtitute the original hard drive for the CD-ROM unit, THEN you can boot from the external drive and open up Drive Setup from the Utilities folder and see if Drive Setup will recognize and format the drive. (That was a long, run on sentence that is an example of bad english grammar. Do not use it as an example of good english! : )

Try finding an Apple OEM drive Original equipment manufacturers install a rom bios chip that tells a Mac what it wants to know immediately and allows the Mac to boot from that drive without any trouble.

Jim

The two most common problems with SCSI Drives are:
1) lack of proper termination -- the last drive on the cable must be terminated. Do you know what is providing the termination? You need to know, not assume. The CD seldom can provide termination.
2) Use of duplicate ID. Each drive must have a unique ID. 7 is used by the Mac. 3 is often used by the CD-ROM drive, and is required to use the Boot from CD with the "C" key. 0 is often used by the original factory-installed Hard Drive.

The IDs are set as a Binary number using three jumpers. Placing a jumper on ADDR2 counts for 4, ADDR1 counts for 2, and ADDR0 counts for 1, then add them up to get the ID.

Do not confuse Termination with TerminationPower. If you have an option to provide TerminationPower to the Bus, set it to ON for every device.

I'll just jump in and say that I have been successfully using my 6100/60 AV with an unpartitioned 3.8 GB internal SCSI HD and have been happily booting from it for a few years.

Mack,

Read this for a quick tutorial on SCSI:

http://www.sony.com.au/objects/AAASupport/Guides/SCSIGuideaus.pdf

The math is as follows.

With no jumpers, labels do not matter and the SCSI ID = 0
If pins marked AO 0 ( or a similar label) are jumped SCSI ID = 1
If pins marked AO 1 ( or a similar label) are jumped SCSI ID = 2
If pins marked AO 2 ( or a similar label) are jumped SCSI ID = 4

Combinations add up like this:
If pins marked AO 0 and AO 1 are jumped SCSI ID = 3 ( 1+2)
If pins marked AO 0 and AO 2 are jumped SCSI ID = 5 ( 1+4)
If pins marked AO 1 and AO 2 are jumped SCSI ID = 6 ( 2+4)
If pins marked AO 0, AO 1 & AO 2 are jumped SCSI ID = 7 (reserved for the Mac motherboard).


I configure my internal HD to ID 1 because almost all internal hard drives are set to ID 0. When I put a HDD into an external case for testing, I do not want to have to change the ID to avoid conflicts with my internal drive. ID 2 is usually up for grabs. ID 3 is almost always the ID for CD-ROM drives, as you noticed with your 12x - great find, BTW. ID 4 is often open - I use it for my external CD burner. ID 5 is typically set on internal Zip drives. ID 6 is the first drive the CPU will look at on the SCSI chain at startup so your fastest boot drive option is theoretically ID 6.

Termination is the signal at the end of the chain to say "stop looking for more SCSI devices." Termination power is used in special cases. The link above gives details.

Enjoy your new toy.

Jim

Mack,

If HD SC Setup gets the job done, great. Then go back and update drivers with Drive Setup from the 7.6.1 CD or newer.

Jim

Oh shucks!

I posted the same thing twice...
Actually, I had posted it once, then the server went down before I got redirected to the thread, so I had doubts on the subject.

This is sooo embarrassing.

I'll just ask my question: does the hard drive size limit only apply to older versions of the MacOS (not 9.1, for example), or does 3.8 GB fit in the size limits?

Please forgive my intrusion.