SCSI terminator, He'll be back!

Blueneko · Post by **Blueneko** » Thu Jan 02, 2003 3:13 pm

Can too much termination on a SCSI chain cause irregularities amongst drives? (mirror raid, Raid1) Before I Tried a 40mb drive, i removed the terminator that was on my scsi chain that was on for my mirrored drives. I already had one for a raid5 I had on another channel. Does the termination apply for the entire controller if I have 1 terminator on the differnet channel?

I have a similar adaptec ultra 160 with a 36 gig cheetah X15 drive, and a dvd rom, burner, truex cd-rom, and a spare 9 gig back-up drive (All scsi)
I have the 36 gig with 9 gig on the 68pin side, while I have the
=>50 pin dvd rom along with the truex cd-rom<---Internal..external---> then the burner using the external 50pin<=
But I only have one terminator on behind the 9 gig on the 68 pin side. I had to cut off the terminator that was on the 50pin since the ultra160 card did not like termination along both channels...... so going back to the 3 channel raid adapter. COuld it have been causing the mirror drives and the raid5 to make it go jello leg on me when I used it?
Its working absoutely fine now since I have taken off the terminator that was behind the mirror drives. Whew too much typing

Sorry for making you think after you read it. Oh and that on my p4 system. Kinda cool to have my bp6 running all scsi. Jeeze even @ work im probably the only computer not including any servers for mine to have 2 scsi drives with a scsi cd-rom
Can you say addicted?

Blueneko · Post by **Blueneko** » Thu Jan 02, 2003 3:54 pm

NOOOOOOOOOOOOOOOO

The cause was not of the terminator! it did it again!
*GROWLS*

RRLedford · Post by **RRLedford** » Fri Jan 03, 2003 12:45 am

Each SCSI chain must be terminated at both ends (of the cable). The controller usually terminates one end, unles the chain/channel continues out to external SCSI devices. If you have both a 68-pin & a 50-pin channel, you will need termination for each end of each channel. Drives usually have a jumper for Term-Enable, so the cable end terminator may have been redundent. Make sure no devices in the middle of the cable are terminated. Some devices supply tremination power & you can get too much termination power, or not enough. Usually the controller supplies enough by itself.

Blueneko · Post by **Blueneko** » Fri Jan 03, 2003 2:47 pm

Ok, Im glad to say its not the bp6. It ran fine overclocked using the 40 gig drive without any adapter. I just placed it onto the 0 ide controller, the slowest dma33 one. The 40 gig drive was quite fast! And no stability issues. So either I use the scsi drives elsewhere and use four 40-gig drives and span em to get a nice 120gig partition which has no redunancy but storage space. Drove me balastic, also I dont believe the raid controller enjoys the overclocked board............or maybe its the drives... or maybe I just need to get my hands away from the machine for a while.

also sorry for clogging up the forum.