On Mon, 08 Oct 2001 21:48:03 -0800 [EMAIL PROTECTED] (tbrock) wrote: > >I thought I had enough offline storage for backing up our 2300c, but >that is not the >case. > >How difficult is it to drop in another harddrive for our 7300? Does the >unit have to >be SCSI, ATA, or IDE, EIDE,? Another 5 gigs would probably do it. Does >anyone have >something like this to sell? Thanks for your replies! Thomas & The Kinders
Get the service manual for the 7300; this makes what I'm saying a LOT clearer! Adding an internal is more complicated than adding an external drive; I'd consider an external drive first... The 7300 has two 3.5" hh hard drive bays; so you can add another hdd. It is SCSI, so you'll have to look for one of those, and it' needs to be a 50-pin connector, one of the more recent ones, there's little room for adapters in there. There are a bunch of dealers in the back of MacAddict magazine selling them. Power-On Computers is selling a 4gb for $89 and a 9 gb for $129; they at least have a DOA warrantee. You'll also may need the drive sled: the little plastic thing that the drive attaches to, which slides into the slots that hold it, to mount it in the case. The sleds are different between the top and bottom slot. Open your case and look on the left hand side of the drive bay; if you see the hard disk drive on top, next to the floppy disk, then you may need the bottom sled. Carefully pry the metal shielding off of the front and look in the bottom HDD bay if there is a flat plastic bracket in the metal bay housing you've got the sled, if not you've got to get one. I got mine at an Apple dealer for $5. Do the same if the existing drive is in the bottom bay...I forget at the moment which is the stock install position. Adding SCSI devices is easy, once you get the hang of it...it's less complicated than it seems as I write it: Since it is scsi, you'll need to make sure the address is set to be different from the other SCSI devices you have, currently. Run either SCSIProbe or Apple System Profiles, they will tell you what address the existing devices have. I don't remember if the 7300 has one or two SCSI busses, either of those utilities will tell you. Look for the one that has your internal CD-Rom on it (unless it's been changed, that's set to ID3 at the factory. NOw, go to the manufacturer's website of your drive, and find the technical manual for it; they all have them; this will show you how to connect it and set the various scsi things you need to set. You're going to have to play with jumpers on your drive at this point. These are small connectors that join pins on the drive controller board. Somewhere onm the drive there will be (usually!) 3 or 4 sets of pins, usually labelled IDn where n is 0-1-2 (sometimes it's 1-3)..they'll look somewhat like the big cable connector, and many times they're right next to it along the back of the drive. Refer to your manual you downloaded. SCSI addresses are all set in the following way: Pin sets jumpered SCSI address none 0 0 1 1 2 0 & 1 3 2 4 0 & 2 5 1 & 2 6 All three 7 Now it's time to worry about termination. MOre than likely you will have to set termination on on your new drive for it to work properly. There are two ways this is set: by resistors or by jumpers. There will often be a pin set marked TE (look in your manual again!); jumpering this will set termination on. Otherwise there are resistor packs, long things that look like skinny IC chips with only one set of legs...if your drive has these, they'll be along the back of the drive where your 50-pin connector is paralleling it. Your drive probably has them installed, though they might come separately in a little platic bag. Ifso, carefully line their little legs up with the holes on the drive circuit board (it'll be the only long line of holes on the board) and press them in. This is somewhat fiddly, the resistor packs can be fragile and the connection kind of tight. There are usually two or three packs; again, the manual you downloaded from your drive manufacturer will be invaluable! Now comes the moment of truth. Refer to your 7300 manual! Unplug your 7300, take the case off. Carefully remove the metal shielding pieces from the front. Unplug the cables from your floppy drive, and the top HDD if your have them. The cable fit on the HDD is tight and you need to be careful to pull it straight off, otherwise you'll bend the pins. No go put a bandage on your knuckles because the %$#$@# power connector on the HD drive is incredibly tight, and when it came loose you banged your knuckles hard against the corner of the drive cage. ;-) The drives are all mounted to a single metal piece, held in by two clips on either side, near the middle. Put a small screwdriver and gently push the plastic clip in enough to pull the drive mounting bracket out some, then do the same on the other side. Now you can pul it forward enough to disconnect the power, data and audio connector from the CD Rom, and the cable and power from the lower HDD. Now you can pull it out all the way. Take the new drive, attached to the bracket and slide it into the metal bracket. The bottom one slides in from the front, the top from the back, which is why you have to disassemble the entire thing no matter which you're using. :-( Reverse the above procedure; attaching the data and power cables (both of which are keyed, so they can only go in one way) and audio cables on the cd-rom and bottom drive, then sliding the bracket all the way in and attaching power and cable to the top drive and floppy. Don't re-assemble all the metal shielding bits or the case yet. Plug everything in and turn it on. Unless you really bled profusely into the computer, you should get the reassuring booonngnngngng of the startup chimes. Now wait. If everything went right and the SCSI Voodoo gods are smiling on you, your mac should start right on up. If the drive was formatted already, it should appear on your desktop. If it doesn't, it has to be formatted, which you can use either drive setup or the software that comes with the drive. If, however, you get a flashing question mark, you probably have SCSI ID problems; make doubly sure everything is set properly. If this persists, try removing the termination if it's on, or adding it if it's off. But most likely it will work right right away. Adding an external drive is a matter of pluggin in the SCSI cable to the back of the mack, setting the ID switch on the drive, and turning it on before you turn on your mac...yoiu may still have to play SCSI voodoo by re-arranging devices and termiinators on the chain if you have multiple devices. Scanners, in particular are really picky. Bruce Johnson College of Pharmacy Information Technology Group -- PowerBooks is sponsored by <http://lowendmac.com/> and... 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