Digital Audio Workstation & MIDI > Audio & MIDI Hardware
Connecting a G4 quicksilver & a Powerbook 520c to an Akai dd1000 simultaneously
ssp3:
IIRC, the top two are for connecting several DD1000's in a chain + remote. The bottom one is for connecting external supported SCSI drive.
(I owned one of these briefly around 201*? when I had an idea to set up a file transfer service to cover all possible formats - Adat, DA-88, Radar etc. Sold it to a DJ at the end who wanted to go back to late 80s production style a la Ben Liebrand).
blaylok:
Thank you everyone for your advice and helpful answers,
After more Google I managed to find this French site dedicated to the Akai dd1000
http://dd1000.free.fr/scsi/dd1000.htm
In the SCSI section it says -
The DD1000 has three SCSI sockets: one SCSI-1 socket, and two SCSI-2 sockets.
Contrary to what one might think, these names do not define the SCSI standards used, but the SCSI bus number. The DD1000 therefore has 2 SCSI buses, to the SCSI-1 standard, and are used as follows:
The SCSI-1 socket is used to connect up to 5 external disk drives. But why 5? While SCSI-1 supports up to 7 devices? The explanation is simple: let's take the case where your DD1000 is connected to a MacIntosh, and to which you have connected 5 external disks. Now let's count the SCSI devices:
- the Macintosh
- the DD1000 (don't forget it!)
- the 5 disk drives.
That's a total of 7 devices!
The SCSI-2 sockets are used to connect the DL1000 (remote control) or a Macintosh™ which will serve as a remote control, using the DD-QMAC software.
To do this, you need to use a Centronics type scsi cable at both ends. Connect to the DD1000 on the one hand, then to your external scsi box on the other hand. We remind you that this operation must be carried out with the machines turned off .
Then position your scsi cap, to end the chain (in case you only have one reader, otherwise position it on the last element of the chain).
SCSI plug
Once this operation has been carried out, you must now specify to the DD1000 that your drive is external
So it seems as though there are indeed 2 x SCSI buses.
Thanks again everyone
blaylok
refinery:
Sounds like problem solved then... OS9 machine to the SCSI2 Connection since it's running the software, and g4 to the SCSI2 Connection.
Gotta admit that sounds like a pretty cool setup. How are the converters on that thing?
robespierre:
The original question was about connecting two computers to the recorder over the same SCSI bus.
The problem is that you can't normally connect two computers to one SCSI bus because they aren't expecting to share devices. The SCSI protocols that permit sharing (RESERVE and RELEASE) are not supported and so this will not work.
Additionally, every unit on a SCSI bus must have a unique SCSI ID, and the capability to change the computer's HBA from its default ID of 7 may not exist, so sharing a bus is again impossible.
When a PowerBook is connected to another computer in SCSI Target Disk Mode, "A unique system control panel on the PowerBook was used to select a non-conflicting SCSI ID number from the host Mac." From what I gather, it resets the ID to its default of 7 when booting to the Finder.
blaylok:
Thanks again everyone
Yes problem solved :)
Refinery - it is indeed a cool set up. I like it alot. The converters in the dd1ooo sound very smooth.
I have swapped out the noisy, old & loud mo drive and replaced it with an internal blueSCSI, it works very well.
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