Hardrive showing on multiple ID's

THX1138 · 15 May 2009, 21:30

Trying to install my Scsi hardrive in my 4000T,but for some strange reason it is showing up on all of the Scsi ID's in the HD Tool Box ?

Any ideas why this is happening ?

thomas · 15 May 2009, 21:38

Are you sure it really shows on all *IDs* and not rather on all *LUNs* ? It's a common problem that SCSI devices answer on requests on all possible LUNs. Sometimes it is caused by inaccurate SCSI termination but sometimes it is simply a bug in the device's firmware. You can reduce the number of LUNs and IDs checked by adjusting the tooltypes SCSI_MAX_LUN resp. SCSI_MAX_ADDRESS.

rkauer · 16 May 2009, 01:56

Also check the drive ID and termination.

Oh, and test with another working cable.

THX1138 · 16 May 2009, 09:17

This is a link to the drive that i'm using :

http://stason.org/TULARC/pc/hard-dri...CSI2-FAST.html

The are no jumpers on ID0,ID1,ID2 so this gives it a scsi ID of 0.

As the hardrive is the only device on the chain at the moment,does the drive itself need to be terminated ?

At the moment W1 & W3 are jumpered.
( Drive provides terminator local power and terminator power to the bus ) ?

Am i right in thinking that even if you are using only one device in a scsi chain,it can connect anywhere along the ribbon cable as long as its terminated ?

If i had 3 devices on the ribbon cable,do they have to go in some sort of order ?.....I know they all would have different ID numbers ?

thomas · 16 May 2009, 09:55

Quote:

As the hardrive is the only device on the chain at the moment,does the drive itself need to be terminated ?

Yes, the SCSI bus always has to be terminated at both ends.

Quote:

Am i right in thinking that even if you are using only one device in a scsi chain,it can connect anywhere along the ribbon cable as long as its terminated ?

Yes, it should not matter where on the cable you connect the devices as long as the order is term - device - device - device - term (the controller counts as a device, too).

But the shorter the distances, the better.

Quote:

If i had 3 devices on the ribbon cable,do they have to go in some sort of order ?.....I know they all would have different ID numbers ?

No special order. Only if you use different SCSI standards (for example UW-SCSI + SCSI2), then you should sort the devices by standard and not mix them.

THX1138 · 16 May 2009, 09:59

So,the way you can see i have it set up at the moment.......can you see why i'm having trouble ?

thomas · 16 May 2009, 10:38

As I understand the description, you have to make sure that terminators are installed at RN1 and RN2 and then close W1. This should be the factory default.

Or make sure that there are no terminators on RN1 and RN2, install a seperate terminator on the cable behind the HDD and close both W1 and W3.

THX1138 · 17 May 2009, 10:15

Instead of trying to use the onboard scsi,i am now using the PPC scsi instead.

The 68pin cable that i am using has a terminater already installed at the end of it,so i have taken the terminater off the hardrive and now it finds it properly.

15 May 2009, 21:30	#1
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Hardrive showing on multiple ID's Trying to install my Scsi hardrive in my 4000T,but for some strange reason it is showing up on all of the Scsi ID's in the HD Tool Box ? Any ideas why this is happening ?

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15 May 2009, 21:38	#2
thomas Registered User Join Date: Jan 2002 Location: Germany Posts: 7,021	Are you sure it really shows on all IDs and not rather on all LUNs ? It's a common problem that SCSI devices answer on requests on all possible LUNs. Sometimes it is caused by inaccurate SCSI termination but sometimes it is simply a bug in the device's firmware. You can reduce the number of LUNs and IDs checked by adjusting the tooltypes SCSI_MAX_LUN resp. SCSI_MAX_ADDRESS.

16 May 2009, 01:56	#3
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Also check the drive ID and termination. Oh, and test with another working cable.

16 May 2009, 09:17	#4
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	This is a link to the drive that i'm using : http://stason.org/TULARC/pc/hard-dri...CSI2-FAST.html The are no jumpers on ID0,ID1,ID2 so this gives it a scsi ID of 0. As the hardrive is the only device on the chain at the moment,does the drive itself need to be terminated ? At the moment W1 & W3 are jumpered. ( Drive provides terminator local power and terminator power to the bus ) ? Am i right in thinking that even if you are using only one device in a scsi chain,it can connect anywhere along the ribbon cable as long as its terminated ? If i had 3 devices on the ribbon cable,do they have to go in some sort of order ?.....I know they all would have different ID numbers ?

16 May 2009, 09:59	#6
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	So,the way you can see i have it set up at the moment.......can you see why i'm having trouble ?

16 May 2009, 10:38	#7
thomas Registered User Join Date: Jan 2002 Location: Germany Posts: 7,021	As I understand the description, you have to make sure that terminators are installed at RN1 and RN2 and then close W1. This should be the factory default. Or make sure that there are no terminators on RN1 and RN2, install a seperate terminator on the cable behind the HDD and close both W1 and W3.

17 May 2009, 10:15	#8
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Instead of trying to use the onboard scsi,i am now using the PPC scsi instead. The 68pin cable that i am using has a terminater already installed at the end of it,so i have taken the terminater off the hardrive and now it finds it properly.

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