Yaking Cat Music Studios

The S/Link & SCSI Page
updated 12/03/99
Corrected information





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*Author assumes no responsibility for the information contained herein*

Here it goes.  I spent 15 hours on this.  It helps.  It works.  It was tested and verified. Use for your own piece of mind.

1)  My Mac's external SCSI port produces +7 volts on the SCSI bus. The Synclavier likes +5.  Measure the DC voltage of pin 38.
2)  Make an adapter that lifts pin 38 of a 50 pin cable to remove TERMPWR from the Mac's external SCSI bus.
3)  If using both towers, leave the Synclavier's D24 TERMINATION RESISTORS and +5 TERMPWR on, connect to DtoD (making sure the D24 is  UNTERMINATED and TERMPWR is removed) with a SCSI 'T' connector on the SCSI 'IN' connector, then connect to the Mac's external SCSI connector with the special TERMPWR-REMOVAL adapter.
4)  If using a DtoD standalone, make sure that ABLE 0's SCSI is TERMINATED with TERMPWR ENABLED.  Use a modified SCSI 'T' connector to allow the Mac to plug into the DtoD (two males with one female 50 pin 'D' sub connector with wire 38 removed for the Mac).
5)  If converting sounds from optical to mac, connect in this order:  Mac, TERMPWR-REMOVAL adapter, Optical, then TERMINATED System Winchester.
6)  Make sure ALL devices EVERYWHERE have "power from SCSI bus" enabled regardless if they are terminated or not.  Only the Synclavier D24 should make +5.
7)  Remove ALL extensions except OPEN TRANSPORT, QUICKTIME and their respective helper files.
8)  Give S/Link all available memory.
9)  Use BIG-ASS SCSI cables - no cheap ones allowed - heavy, triple shield.
10)  Make sure there are NO semi corrupted files on the optical and system winchester and no other files but sound files.
11)  Try not to reset the computers during a read/write operation (disk light active), even if the mac looks "hung".  Give it a second. If necessary, then reset the "Drive Reset" on the DtoD or the mac's software reset - control, open apple, del.
12  When using the Synclavier with optical, connect Synclavier to Optical to Winchester (terminated).

Transfers will be faster because there is no bizarre voltage potentials on the SCSI bus (you can burn out devices otherwise).  Hang-ups will occur less.  The possibility of quitting S/Link without the Mac bombing will increase.

--
Brandon Amison
Yaking Cat Music Studios
Synclavier Assistance
Music for Television and Film
http://www.yakingcat.com/yaking/
THE source of Synclavier information

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The Optical Drive MUST be the first drive on the SCSI chain.

The 3200/6400/9600 require the use of a terminator  into the Expansion Port as the internal drives are NOT terminated.

When using a DtoD slaved to the Synclavier 3200/6400/9600 the configuration is as follows:
Synclavier Expansion Port Out to DtoD SCSI In.  If using an Optical Drive, the drive is placed in-between the two towers and NOT terminated.  Termination is achieved through the two D24/50 boards.

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...AND PROBABLY THE BEST ADVICE FOR ANY SCSI USER!!!

http://www.idbdnet.com/infotech/scsisolved.html

Apparently most Macs supply TERMPWR to the SCSI bus.  One has to make
sure with older drives to 1) remove termination unless at the end of the
chain and 2) jumper "receive power from SCSI bus only".  Termination and
power are two different things.  On newer devices, they sometimes supply
voltage even though you don't want it.   You have to physically cut the
cable line leading to TERMPWR.  This causes differentials in the voltage
which leads to slower transmission and/or occasional to complete
errors...

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Important drive configuration information for ALL drives:
1.Set the jumpers for a unique SCSI ID. See chart below.
2.Set the Termination Power to "From the Bus".
3.If the drive is the last device on the SCSI Cable, set the Termination ON. If you are adding the drive in the middle of the cable, set the termination OFF.
4.There should be only ONE device supplying +5 volts to the SCSI bus!!!
5.And keep those cables as shielded and short as possible.  I build my own custom cables and adapters...

Internal lengths are:
Optical = 6"
Winchester = 18"
Synclavier/DtoD computer panel = 14"

These lengths have to be considered when calculating Total Cable Length (18 feet max.)

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Common SCSI ID numbers:
0=Macintosh Hard Drive
1=Synclavier Optical Disk
2=
3=DtoD
4=
5=Synclavier System Winchester
6=Synclavier CPU
7=Macintosh CPU
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For MORE terrific SCSI information about "Power Mac 7500,7600,8500,9500 Series: SCSI-2 Compliance" go to
http://til.info.apple.com/techinfo.nsf/artnum/n18198

For information on proper termination go to
http://lowendmac.com/tech/termination2.shtml
or
http://lowendmac.com/tech/termination.shtml

And for every topic you can imagine
http://macsupport.about.com/compute/macsupport/msub10.htm?iam=dp&rf=dp

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Now that I'm in the full swing of transferring whole categories of FZ's 
samples from Synclavier to AIFF for assembling to CD on Sonic Solutions, I'm
having to use S/tink for more than just the occasional conversion of a
single file.  I'm now being reminded of how shitty this application is when
it comes to it's "multiple item transfer" feature.  It completely bombs
almost half the time.  I end up selecting only about 10 items at a time in
the hopes this will help prevent it from crashing.

Even though I've never seen the source code for this program, I think it's
fair to say that if it crashes this frequently and consistently, it must
just be poorly written.

Even aside from the feeling one gets when using S/tink that you should cross
your fingers and pray while a transfer is in progress, it has so many
annoying quirks and things that just plain don't work right.  I can't wait
for Cameron's AIFF translators.

Todd Humongous

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To do an Optical to Optical copy, do not use Opcopy.  Use FWB Hard Disk ToolKit and do a SCSI "mirror" copy.  It is WAY faster.
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For terrific SCSI information go to
http://til.info.apple.com/techinfo.nsf/artnum/n9387

To download S/Link, go here

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To lift sounds off an audio CD in your CD-ROM, the drive HAS to have a SCSI interface.

Todd Yvega wrote: 

   Not true.  Zappa's G3 has the CD drive on the ATA bus, and S/Tink works fine here (so it HAS to
   work there.)

Bizarre.  That is supposed to be the golden rule.  Sean Callery couldn't get his to work and he has a
G3 with a built-in CD-ROM also.  Your experience is contrary to what I have read in several articles
(as if we can really believe what we read in music/computer magazines...)

Oh well.  Color me dumb! - Brandon (maybe it is IDE drives...) Actually, I just read about it at http://www.xlr8yourmac.com/audio/issue12.html

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It seems that with all the various SCSI cards and ROMs and the two decades in which all this evolved, there are some DtoD incompatibilities that cannot be overcome.   MOs can also be problematic.

However, S/Link works PERFECTLY with the Synclavier - Don't I wish ;-) 

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Really, the best version to use with the Synclavier is a bug fix update called 2.0r6
-Andy.
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Turn Virtual Memory OFF.  Leave it OFF.  Keep it OFF!!!!
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As a fellow S/Link victim, let me say this:

I bought S/Link directly from Airworks by telephone.  The company never 
got around to charging my credit card.  I STILL FEEL CHEATED!!!
-Todd Yvega

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Important S/Link pseudo fact:  S/Link BLOWS!
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Important S/Link Sucky-Problem!
After wasting an entire night, I have identified a "bug" which plagues batch file transfers!  If you are copying several files, and their names are i.e.  "hello1.wav", "hello2.wav", etc. and you select all the files to be copied at once you get some massive errors in your Synclavier.  S/Link attempts to reduce the name size to 8 characters which is the maximum length allowable by the Synclavier.  It removes the necessary amount of characters from the decimal on over to the left.  Hence, "hello1.wav" would become "hell.wav" (a very appropriate title by the way).  Now you would have several files all named "hell.wav" with S/Link unsuccessfully trying to copy them to your System Winchester.  The end result (when viewed on the RTP 'B' page) are files with outrageous file sizes, sample rates, etc.  If you try to load or copy these files the system will hang.

I had to change the names of several dozen files to perform my last job duty.  They should pay us to use S/Link.

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If you need to get sounds to and from you DtoD and none of this works then:
Copy your cues to an Optical Drive and S/Link them to your Mac or
Copy your cues to an "Optically formatted hard drive" (Release 4.02), copy them to W0: and then copy them to your Mac with S/Link.  S/Link does not recognize an "Optically formatted hard drive", hence this round-about method.
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On the D24 card:
The jumper in-between the two termination resistor packs determines whether or not 5 volts is sent for termination power over the SCSI bus.
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The last Synclavier software version tested by Airworks is Release 3.23
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Release 4.02 allows a user to format a hard drive as an optical drive.  Unfortunately, S/Link does not see these drives.
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When transferring 12" WORMs to 5" opticals with S/Link, connect the two drives with the System Winchester directly to the Macintosh.  Or use Release 4.02 "OPCOPY" to copy between the drives.
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Only use S/Link 2.0 for Synclavier/DtoD.  The code in 2.1 is broken for our machines.  For example, with a D to D, you cannot write to Track 1.  Contact Andy Pettit if you need this version.
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S/Link *CAN* access the DtoD.  Try removing the termination resistors from the DtoDs D24 card that goes to the External "In" SCSI connector.  Also remove the jumper which sits in-between the resistor packs.  If you use the DtoD as a slave, you need a SCSI 'T' adapter on the "In" connector to place the DtoD in-between the Synclavier and Mac for proper termination.  If you use a DtoD as a stand-alone, you need the same 'T' connector with one end going to the "Out" SCSI connector  on your DtoD instead of the Synclavier.   S/Link should now work fine!  Thank you Todd!

IMPORTANT INFORMATION:  once this modification is made, you *MAY* have to use an active terminator if you wish your system to run as a stand-alone machine or without S/Link.  Here is a better alternative:

On the back of my PostPro are four "Time Expansion" connectors which lead straight to the hard drives.  By connecting your Mac to these ports, the tracks come off at a 2 to 3 times faster rate.  Before I did this, I was receiving "Read-Errors".  It looks as if the data was having to make too many "connections" (SCSI cards, several feet of cable, etc.) before it got to the Mac.  I was told by Andy Pettit of Airworks to also try using an APS SCSI Sentry or active termination and increasing the memory to the application.  This did not help in my case (I have only a generic active terminator, however).

I am now tape free.  I mix my DtoD and Synclavier tracks to 2 tracks on the DtoD.  I then S/Link them to the Mac for cue editing in ProTools to be placed onto Zip disks or a CD-RW.  Let me tell you folks, the sound is incredible.  *NO MORE TAPE!*

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Quick S/Link factoid.
SLink cannot differentiate between the Mac's two SCSI busses although connecting a SCSI card seems to cause no such interference.

 

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brandon@yakingcat.com