I'm in a similar boat, with no solution yet either. My new G4 733 (OS 9.1)
will lock up trying to open Photoshop images until I disconnect the
external SCSI chain, which is running off an Adaptec 2906 card. Internally
I also have an IBM ES DeskStar 18-gig drive connected to that card, and the
Photoshop images are on that drive. The Mac acts pretty weird at times with
the external SCSI chain connected (even with the devices turned off)--for
example certain Photoshop files will always open, while certain others will
start to open and then lock up the machine every time. If I disconnect the
external SCSI chain, however, (which contains a big old Relysis flatbed
scanner, a Polaroid slide scanner, and a SyQuest cartridge drive) from the
G4, all is well again and all Photoshop files open easily, and the system
is stable.
The internal SCSI IBM hard drive has a little jumper on two pins labeled
"Enable Term Power" or something like that, and someone told me that I
should always keep that jumper on there. However, I've tried the setup with
the jumper both on and off, and it makes little difference either way,
except that the Mac behaves a bit better with the jumper off, and locks up
less frequently. So I've taken the jumper off. And now I also keep the
external SCSI chain disconnected until I need to scan something or transfer
a file out on a SyQuest cartridge.
My external SCSI chain is terminated (with an external terminator block) at
its end and all the devices (including the internal drive) have different
ID's, and the same external setup always worked flawlessly for years while
connected to my old all-SCSI 8100. But it apparently doesn't like the
Adaptec card in the G4, or maybe it's OS 9, who knows. By the way, my
external SCSI chain also originally contained a Yamaha CD-RW and an
external hard drive, but I had to remove those because the G4 would never
recognize them at all, and the system frequently locked up with them
connected.
I've used SCSI stuff exclusively with all my Macs since my first Mac Plus
in 1986, of course, and I've always found SCSI to be temperamental. If I
hadn't once spent a cumulative $3000 or so on those three external SCSI
devices I'd chuck them all and go all IDE/USB (I may have to anyway
eventually).
This particular Adaptec SCSI card, the 2906, will not allow starting up
from the internal hard drive connected to it, and I would not have bought
this card had I known that in advance. Also when I start the G4 up from a
CD such as TechTool or Disk Warrior, they cannot see the internal SCSI hard
drive to work on it, I suppose because they don't contain the Adaptec
extension.
I've become resigned to these SCSI idiosyncracies, but if anyone reading
this has any ideas how I can resolve them I'm sure willing to listen.
Tom
-----------------------
At 4:55 PM -0400 7/12/01, [EMAIL PROTECTED] wrote:
>This machine has kind of been a dud since we got it but now it's gotten to
>the point where we're going to toss it if we can't fix it. I want to try
>one more time.
>
>We have a Blue&White G3 450 (the version with a serial port) that we
>ordered a while back directly from Apple. We had them pop in an Adaptec
>2940 SCSI card and SCSI drive in it as we would be scanning all day
>everyday, exclusively on this machine. We were disappointed to see that the
>card was only providing an internal SCSI connection so we bought yet
>another SCSI card (Initio Miles Blue Note) and installed it along side the
>Adaptec card.
>
>So we have just the stock DVD drive and Zip Drive on the IDE chain.
>SCSI Bus 1 is the Blue Note Card and an Agfa Scanner is attached to it at
>ID #4.
>SCSI Bus 2 is the Adaptec Card has the IBM HD (8.5gigs formatted Mac OS
>Standard) on it at ID 0.
>
>The machine also has 320megs of RAM in it.
>We're running OS 8.6 in it because EVERYTIME we install OS9 (5 times now)
>we enter the 7th circle of Hell. (OS9 runs wonderfully on the G4's).
>
>The machine seems perfectly stable and we don't crash except when scanning
>and working in Photoshop. The machine does fine in the morning but towards
>the middle and end of the day Photoshop starts giving "not enough memory to
>create a preview" and or just crashes. That's to say Photoshop crashes, not
>the machine. It definitely seems to me a cumulative process as Photoshop is
>fine until we've been scanning for a few hours.
>
>Does anyone have any ideas? We are truly desperate.
>
>Thanks
>The Machine also hasindiebandz.com-localband-resource-for-nyc
>
>
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