Mounting a SCSI Hard Drive

May be something in the OWC instructional video.
http://eshop.macsales.com/tech_center/index.cfm?page=Video/directory.html

Cheers, Tom

Re: Since I am planning to use this drive as a second drive in the zip bay of a PM6500 maybe this is the jumper setting I am looking for.

Years ago when I had a PM6500 I added a second SCSI HD in the Zip drive location. The only thing I had to add was a short extension on the power cable, since the HD was not as long as the Zip drive. The extension that I used was actually a Y-cable purchased at Micro Center.

Cheers, Tom

The basic strap settings are here:

How do I set the jumpers on a Western Digital SCSI hard drive?

LVD drives cannot set termination by a strap setting -- the required LVD/SE terminator is too large to fit on the drive logic board. LVD stand for Low Voltage Differential, the push-pull drivers used in that drive for highest speed operation. For compatibility with older controllers, most of these drives can be set to use the Older SE -- Single-Ended mode, at a much slower transfer rate. The strap setting to force Single-Ended mode is not shown on the Western digital strapping guide.

If you are using only a passive terminator, that may be the problem. You will need at least an active terminator to respond fast enough to avoid data corruption.

The information about requiring SilverLining or FWB Tools probably pre-dates Drive setup 1.7.3, and may no longer apply. A very good Tool for examining and testing SCSI drives is Mount Everything:

http://www.overnet.de/hhp/mte/

Setting that high-performance drive into SE mode and running it on a narrow controller and cable takes away some of the high performance of the drive. When Apple shipped G4's with SCSI drives, they included the Apple/ATTO Express PCI UL2D card, a 2-channel LVD card, and installed a three-drive 68-pin LVD cable and LVD/SE terminator. These part are available on the used market for modest amounts -- the cards are listed on ebay for under US$25 and a cable with captive terminator for under US$15.

Hello Joe and Grant,

I just tonight put the finishing touches on a SCSI equipped DA, moving sort of slowly, since this is my first venture into the SCSI world. I used an ATTO Express UL3S single channel card with a two drive 68 pin LVD cable and an LVD/SE terminator, a fat flat thing that won't let you mount the drive comfortably on the mac's floor where you want it. I used two Seagate high speed drives, an ST318452LW(OSX) and a ST336607LW(OS9). I had to set the jumpers differently on the second, but it really wasn't all that difficult once I decided which end of the diagram was up. Took me a while to find where all the drives were since I'm not too familiar with OSXPanther, but it went right smoothly, fired right up, and I type this missive on it now.

Figure if I can do it, anyone can.

Regards.....Jon

Why not just replace the internal IDE hard drive in the 6500 with an Ultra ATA-133 drive? A new drive will run cooler and has a faster rotational speed. Obviously, you won't get the Ultra ATA-133 speed boost, when connected to the 6500's onboard IDE controller; but when you're ready to retire the 6500, the ATA-133 drive will probably be more useful than a 9.1 GB SCSI drive. The combined costs of the controller card, cabling, and shipping just to use the (bargain) 9.1 SCSI drive may be more expensive than it's worth. You could pick up a used beige G3, for what you'll spend on the SCSI hardware. A few years ago, I acquired a similar 9.1 GB IBM LVD-SE drive from a PC. I installed it in a SCSI-2 external case (SE mode), which required a 68-50 pin internal adapter and an external, active terminator on the alternate Centronics-50 rear port. It's a quiet drive and is more than adequate for backups. I've got Ultra-SCSI controller cards that would enable installing it internally, but my B&W G3 has the Ultra ATA-133 controller card and 120 GB drive - which are more useful than a speedy 9.1 GB drive. I do have a bootable Adaptec 2930 Ultra-SCSI controller card (firmware-based) installed in the B&W, so the 9.1 SCSI drive is occasionally used to boot it. Ideally, if you want to use the drive with a slower, narrow SCSI-1 or SCSI-2 bus, you should install a 68-50 pin adapter with high-byte termination (9-line negation). It ties off the (18) unused conductors, something that the standard adapter can't do. Here's a (downloadable) useful reference, for understanding SCSI terminology.

Anyway, that's my input. I've got a pair of 6500s that I haven't parted with yet, but they've been retired since I moved on to newer hardware for everyday use. They make great iTunes jukeboxes (with their built-in sub-woofer), but the 128 MB memory cap and slow 50 MHz system bus are inherent limitations that date them.

I am not sure if this will help you. I have a B&W G3 which originally had the 2906 SCSI card. I then bought a G4 and moved the card over. On both computers the Adaptec 2906 card would not see the SCSI ORB unit or external Zip drive when I started using OS X. After many attempts to correct this problem, with no support from Adaptec as they called it the "OEM" card, I found a fix. I moved the "Adaptec290x-2930.kext" file in System>Library>Extensions into an "Untitled Folder" in the Extensions folder and both units now mount and work whenever I need to use them. Good luck.

1.25 GHz G4 Mac OS X (10.4.7) B&W G3/350