how to hook up these scsi drives?

[grasshopperbe]

I have 6 SCSI seagate barracuda 4,3 gb hd's that i salvaged from an old server. (see my previous thread)
http://forum.pcmech.com/showthread.php?threadid=79069

now these drives are in green boxes with an scsi connector in the back, but there isn't a 12v connector on them. i also salvaged 2 scsi cdroms from that server and these do have the 12v connector. any ideas anyone?

secondly, i would like to try and hook these hd's to a pci to scsi controller card that i have in a p200mmx. (it is used for a jazz drive now)

is it possible to hook these hd's and/or cdroms up to this scsi controller card? and how does this work? im pretty much a noob when it comes to scsi.
i seem to picked up somewhere that scsi can put many drives on a 'chain' unlike the 2 drives with ide controllers

[glc]

Those are probably 80 pin "SCA" drives, designed to be used in a hotswap array. Can you give me the exact Seagate model numbers? You are looking at a considerable expense adapting all this equipment to use in your PC - it *can* be done, but it's not worth it in my opinion.

If you really want to pursue it, I need to know the exact model of the SCSI card you have, along with the connector types (internal and external). To help you, these are the common connector types:

External:
25 pin "D" (looks just like a parallel port, male)
50 pin "D" (looks like a HUGE parallel port, male)
50 pin mini (small rectangular connector)
68 pin mini (a larger version of a 50 pin mini)

Internal:
50 pin (looks like a wide IDE connector)
68 pin (small "D", female)

Are the CD-Roms 50 pin or 68 pin "D"?

What types of cables can you rescue from the old server?

[grasshopperbe]

thanks for the swift reply glc

waw that's quite a bit more difficult than i anticipated . i thought it would be something like connecting that jazz drive.
it seems you're right with that hotswapping, they are in 'trays' that easily can be taken out an pushed in.

how do you mean a considerable expense? do i need to buy extra components to get it to work? that wasnt the idea indeed.
i have salvaged most of the cables from the server, its about 5 or 6 really long cables. i hoped i could connect them with the cables i salvaged. but if it ll cost me extra money or so ill just throw em away.

ill check out the connector types, i really have no idea right now.

[grasshopperbe]

i got the info on from the card and drives

the scsi controller card is a
buslogic BA81C15 6a2043 9634 FATIPP
(on the chip)

the drives are seagate barracuda blgd : klgspr

model no : st15150n

i looked at the connectors, and it seems like it can be hooked up to the cable from the jazz drive. if i just take of that thing at the end (the stopper or what is its name)
place a drive there (the connectors are all like wide ide connectors) and put the stopper at the end of the new cable (i hope) . could this work without having to spend money on it ? (apart from a cable or so)

[Floppyman]

I'm assuming the "stopper" you are talking about is a terminator. Unless you can terminate the SCSI chain at the last drive on the chain(via jumper for example) you will need to keep the terminator on the cable. HTH

[glc]

http://www.seagate.com/support/disc/scsi/st15150n.html

The drives are 50 pin, I bet if you take them out of the trays you will find standard Molex connectors.

That card will support 7 devices attached to it. Each drive must be assigned a unique SCSI ID from 0 to 7, and the card uses one of those ID's. The last drive in the chain must be terminated by jumper or an active terminator at the end of the cable, all drives in between must not be terminated.

I doubt that card has a bootable bios, so none of the drives on that chain can be used for a boot drive.

Hope you have a powerful PSU to run those things - and those old Barracudas have a very loud whine and run very hot.

[grasshopperbe]

thanks for the help.

i removed the drives from the trays, and they're standard molux indeed. it just looked a bit funny when it was inside the tray.
Well if its doable without me buying extra things, ill give it a go with one or 2 hard drives. i have found a few cables and i have the terminator (thanks floppyman)
i still have some 2 gb maxtor drives, i can use one of those to boot from.

those hd's didnt seem to have jumpers on em, but the 2 cdroms do (btw they're toshiba cdroms) . im going to a little extra reading on it, bit i think im going to give it a test run. the idea is rather to see if i can get it to work, keeping it to work isnt that important.

[glc]

The link I posted has the jumper chart for those drives. You need a SINGLE cable to chain the drives together.

[grasshopperbe]

with a single cable, do you mean one with one connector on one end an one on the other? (as i said i m a noob when it comes to scsi, wanted to try this for 'learning'.)

[Blakhart]

As in a cable with enough connectors to support as many drives as you want on it plus hba (the scsi card) and termination connectors.

You have to give every drive a different id via jumper or you will run into trouble. The drive with the os installed should be id0, then go on down the line of id's. It doesn't matter where they are on the cable tho.

[glc]

Blak - not going to be able to put an OS drive on the chain, that scsi adapter card doesn't have a bios if it's a Jaz card.

[Blakhart]

Oops.

[glc]

The way around that is look around for a used Adaptec 2940 card - or some other card that has a bootable bios. That way you can also boot from one of the CD drives on the chain too and you won't have to mix IDE and SCSI in the box.

The Buslogic part number you gave us is just the chip - if you can get a better ID on the card itself the story may be different - it may well have a bios but if it's the card that shipped with the Jaz drive it doesn't.