Seagate HDD 50 pin SCSI needed help. [external scsi case] [adeptec]
Q: Ok, heres the deal, I have the model # ST15150N Seagate HDDs and ST15230N. They are mounted in an external SCSI case, and Im using an Adaptec 2940 Card W. I use an active terminator on the SCSI cable, all else set IDs, such as 0,1,2,3, and the card is set to 7. The machine will then post it goes to the Adaptec screen detects the drives, and the BIOS says successfully installed, then freezes. the only jumpers I have set the SCSI ID jumpers. What could be causing this freeze? It will not even to Windows. The case is scsi connected by a new SCSI cable HD50. Tell me people, what is it?
Re:<<No, it ia an internal terminator on the end of the SCSI cable, this is a homemade SCSI box, out of a 486 gateway tower, an adaptor, and the drives. Thing is, I had a tape drive functioning in this box just fine with this setup, but add the drives, and it freezes, is there a jumper setting I am missing?>>
Something tells me the problem is somewhere in this setup.. first how are you connected to the controller with this internal ribbon cable used externally? Are you adapted to the external connector or do you have it run through the case to the internal connector? And how is it connected at the external box? Direct to the HDD? How long is the cable? You know you are limited to cable lengths, especially using multiple drives. Onboard termination of the drive itself may not be adequate with a long cable and multiple drives. You really should consider a true SCSI enclosure, with a true external cable, and a good hardware external active terminator, or use the drives internal in the main box with a short cable. Ive had a couple internal cables with built in terminator that were just pure junk too.. the termination was faulty. You also noted that the cable is terminate and the last drive is also terminated?
Re:Are you using both internal and external devices? I think you have to terminate the last device on both and set controller termination to disabled.
Re:Sounds like you have it setup correctly.
At this point, I'd try each drive by itself (terminated) and see if you get further.
Is you cable 50-pin HD to 50-pin HD or are you using an adapter somewhere – I've had those cause problems.
If you have an internal 50-pin SCSI ribbon cable, I'd try that just to take the external chassis, connectors, adapters (if any) out of the loop.
Re:All the drives have had thier pins removed, I then reset the jumpers to the correct SCSI ID, then, I set one drive on the end of the chain and set it toenable termination. now it still hangs. I am not trying to boot from this, all I want to do is use it as external storage.
Re:If you want to boot From SCSI in older systems, Remove the drives from the bios but leave the controllers active, Windoze will mount them when it comes up, Hopefully you dont have a perminent autosetting or your out of luck.
If they are 50pin then one of the drives may already be terminated check on that.
Re:Controller is terminated
Baracuda Specs (http://seagate.com/support/disc/scsi/st15150n.html)
Seagate HAWK Drive Specs (http://seagate.com/support/disc/scsi/st15230n.html)
Re:Make sure the controller is terminated as well via the SCSI bios. I don't remember with the 2940UW is there is an 'auto' termination setting or if you have to specificially chose 'enabled' or 'disabled'. Make sure it's enabled if you have no internal SCSI devices.
Also, if you have an internal IDE hard drive and want to boot to that, fine. If you want to boot SCSI, you need to set your system BIOS to boot SCSI if you have that selection, if it's an older system and you do not have that choice, you'll have to boot IDE.
Re:I'd try it without the terminator on the cable (usually you just do that with LVD drives) but terminate the last drive on the chain via the jumper setting on the drive.
Re:No, it ia an internal terminator on the end of the SCSI cable, this is a homemade SCSI box, out of a 486 gateway tower, an adaptor, and the drives. Thing is, I had a tape drive functioning in this box just fine with this setup, but add the drives, and it freezes, is there a jumper setting I am missing?
Re:Explain how it's terminated. Are there 2 connectors on the back of the external case, one having a terminator connected to it and the other having the cable connected to it?
Re:Ok, problem description is up now, sorry 'bout that.
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Tags: adeptec, external scsi case