AELevy@DOCKMASTER.NCSC.MIL (06/13/89)
I note that I can connect a crate 60m (seagate) and a terminator to my gs apple scsi card, I can daisy chain a seagate 157n (in a la cie box) and everything works. I cannot get the system to recognize the 3.5 157n by itself (tried with and without terminator). Will 3.5 inch seagates not work with the apple scsi?? This is a little wierd and probably has something to do with the apple scsi card but I do not know (for example why do you have to terminate drives that work fine on the mac?) Does anyone know? Any ideas would be appreciated Thanks Allan
STEIN@UCONNVM.BITNET (Alan Stein) (06/13/89)
>I note that I can connect a crate 60m (seagate) and a terminator to my >gs apple scsi card, I can daisy chain a seagate 157n (in a la cie box) >and everything works. I cannot get the system to recognize the 3.5 157n >by itself (tried with and without terminator). Will 3.5 inch seagates >not work with the apple scsi?? This is a little wierd and probably has >something to do with the apple scsi card but I do not know (for example >why do you have to terminate drives that work fine on the mac?) > >Does anyone know? > >Any ideas would be appreciated Thanks Allan Has it been formatted under GS/OS and has the system folder been put in the root directory? Alan H. Stein | stein@uconnvm.bitnet Department of Mathematics | stein%uconnvm.bitnet@mitvma.mit.edu University of Connecticut | ...psuvax1!UCONNVM.BITNET!STEIN 32 Hillside Avenue | Waterbury, CT 06710 | Compu$erve 71545,1500 (203) 757-1231 | GEnie ah.stein
shatara@memit.dec.com (Chris Shatara) (06/14/89)
A question regarding Seagate SCSI drives (3.5").... Do these drives require an EXTERNAL terminator when used with an //gs (with an Apple SCSI) card or are the terminators on the drive module? The reason I ask is that I have a 30meg, 3.5" seagate (ST138N) tied to my //gs and I love it. The "problem" (not really a problem) I have is that when I'm in an idle state doing nothing, the disk heads sound like they're seeking. The light on the drive doesn't come on. I bought the drive for a small outfit in the local area and they told me this was normal. I was wondering if I needed to put a terminator on the cable. --- Chris Shatara shatara@memit.dec.com --or-- ...!decwrl!memit.dec.com!shatara --or-- shatara%leddev.dec@decwrl.dec.com ---
swong@pro-generic.cts.com (Stanley Wong) (06/14/89)
Network Comment: to #2402 by pnet01!crash!DOCKMASTER.NCSC.MIL!AELevy > I note that I can connect a crate 60m (seagate) and a terminator to my > gs apple scsi card, I can daisy chain a seagate 157n (in a la cie box) > and everything works. I cannot get the system to recognize the 3.5 157n > by itself (tried with and without terminator). Will 3.5 inch seagates > not work with the apple scsi?? This is a little wierd and probably has > something to do with the apple scsi card but I do not know (for example > why do you have to terminate drives that work fine on the mac?) > > Does anyone know? > > Any ideas would be appreciated Thanks Allan Well, I have a Mac Crate 60m hard drive on my IIgs. When I first hooked it up through my Apple II SCSI card, it wouldn't recognize it. It knew there was a SCSI card in the system, but couldn't find any devices. I called CRATE and they said that you can get a Terminator that would work from Quality Computers and that would make the drive work. I thought this was kind of awkward, since the ST-277n was already terminated inside. (underneath the drive). Anyway, I talked to a friend who has had experience with the Crate drives, and he told me that there *IS* a difference between pins 25 and 24 on a Mac SCSI cable and II SCSI. To make the 25 pin cable working, all I had to do was put a jumper on the jumper pin just underneath the PC board inside the Crate. (The little board which divides the 50 pin cable into 2 25pin ports). This switched the pins (according to him, and he said he got the info fromt he SCSI Technical Ref manuals) and would allow me to use the Crate on the GS. Well, it worked. I don't have any specs ont he LaCie, but I suspect that it uses a 25 pin layout. I don't know anything about the casing, so there might not be a jumper pin. However, If you open the drive, I am sure that you can pull the 50 pin ribbon coming from the Seagate mechanism out from the 25 pin port, and connect it to at STANDARD 50 pin, terminate it (if necessary) and hook it up. I think this would be a possible solution. [InterNet] : swong@pro-generic.cts.com [ProLine ] : swong@pro-generic [DDN ] : crash!pnet01!pro-generic!swong [UUCP] : hplabs!crash!pnet01!pro-generic!swong
swong@pro-generic.cts.com (Stanley Wong) (06/16/89)
Network Comment: to #2448 by pnet01!crash!decuac.dec.com!mountn.dec.com!memit.dec.com > A question regarding Seagate SCSI drives (3.5").... > Do these drives require an EXTERNAL terminator when used with an > //gs (with an Apple SCSI) card or are the terminators on the drive > module? > The reason I ask is that I have a 30meg, 3.5" seagate (ST138N) tied > to my //gs and I love it. The "problem" (not really a problem) I have > is that when I'm in an idle state doing nothing, the disk heads sound > like they're seeking. The light on the drive doesn't come on. I > bought the drive for a small outfit in the local area and they told > me this was normal. I was wondering if I needed to put a terminator on > the cable. > --- > Chris Shatara shatara@memit.dec.com > --or-- ...!decwrl!memit.dec.com!shatara > --or-- shatara%leddev.dec@decwrl.dec.com >--- Termination of SCSI devices on the SCSI bus is done to reduce false signals that can cause your computer system to act erratically. Although I find it weird that it only occurs while idling, It wouldn't hurt to put a terminator on it. I am sure you could take the terminator back for a refund if the same results still persist. [InterNet] : swong@pro-generic.cts.com [ProLine ] : swong@pro-generic [DDN ] : crash!pnet01!pro-generic!swong [UUCP] : hplabs!crash!pnet01!pro-generic!swong
bobl@pro-graphics.UUCP (Bob Lindabury) (06/16/89)
Network Comment: to #76 by pnet01!crash!decuac.dec.com!mountn.dec.com!memit.dec.com
>From what I've been told from some of my associates that HAVE an Apple SCSI
card and homemade hard drive (Seagate), there is a pin that has to be jumpered
that Apple doesn't tell you about in the SCSI manual. I'm not sure if it is a
jumper or a switch and I'm not sure if it is #8 or #9 but I can find out for
you and post the information here. I should have an answer for you later
today..I just have to make a quick phone call. I'll see if there is a file
that I can RCP to people who are interested in it. If you are, please leave
me e-mail as I will not remember who to send what to if it's not in my
mailbox. The request for info that is..
Bob
BTW, are you all seeing my signature? I sure don't see it...