| Author |
Message |
Michael Perkonigg
Guest
|
 Posted:
Thu Jun 23, 2005 3:01 pm Post subject:
Is a LVD/SE terminator multimode? |
|
|
Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
Thanks,
Mike |
|
| Back to top |
|
 |
Ron Reaugh
Guest
|
| Posted:
Thu Jun 23, 2005 5:36 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at...
| Quote: | Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
|
What feature/functionality of "multimode" is of concern to you? Why are you
concerned that a plain LVD/SE terminator wont do the job? |
|
| Back to top |
|
|
Folkert Rienstra
Guest
|
| Posted:
Thu Jun 23, 2005 6:57 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at
| Quote: | Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
|
An LVD/SE terminator is multimode.
That is what LVD/SE means, LVD and SE, both modes supported.
|
|
| Back to top |
|
|
Michael Perkonigg
Guest
|
| Posted:
Thu Jun 30, 2005 1:06 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
On 2005-06-23, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
| Quote: |
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at...
Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
What feature/functionality of "multimode" is of concern to you? Why are you
concerned that a plain LVD/SE terminator wont do the job?
Well I have problems with an external LVD tape drive and some narrow HBAs |
and I don't know exactly what the problem is. So I thought that the
terminator I have might be the problem. There is no LVD/SE sign on it.
Thanks,
Mike |
|
| Back to top |
|
|
Ron Reaugh
Guest
|
| Posted:
Thu Jun 30, 2005 2:00 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42c3a805$0$21824$91cee783@newsreader02.highway.telekom.at...
| Quote: | On 2005-06-23, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at...
Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
What feature/functionality of "multimode" is of concern to you? Why are
you
concerned that a plain LVD/SE terminator wont do the job?
Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
|
Some narrow HBAs can't supply sufficient power for a wide terminator. How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
| Quote: | So I thought that the
terminator I have might be the problem.
|
Probably is but then there are more mines in the field.
| Quote: | There is no LVD/SE sign on it.
|
Tell everything about it in the detailed description of the entire cabling &
device setup to the HBA requested above. |
|
| Back to top |
|
|
Folkert Rienstra
Guest
|
| Posted:
Thu Jun 30, 2005 7:24 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Ron Reaugh" <ron-reaugh@worldnet.att.net> wrote in message news:wwOwe.1053324$w62.669390@bgtnsc05-news.ops.worldnet.att.net
| Quote: | "Michael Perkonigg" <blablu@gmx.net> wrote in message news:42c3a805$0$21824$91cee783@newsreader02.highway.telekom.at...
On 2005-06-23, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
"Michael Perkonigg" blablu@gmx.net> wrote in message news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at...
Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is multimode.
Or are there LVD/SE terminators which are not multimode terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
What feature/functionality of "multimode" is of concern to you? Why are you
concerned that a plain LVD/SE terminator wont do the job?
Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator.
|
That is for a passive terminator. They can for an active terminator.
| Quote: | How EXACTLY is the setup currently cabled? Cabling a narrow SE HBA
to an external LVD tape drive isn't a trivial cabling case.
|
It should be. And if it isn't it isn't something you can observe from outside.
| Quote: |
So I thought that the terminator I have might be the problem.
Probably is but then there are more mines in the field.
|
Such as diffsens signal not connected in HBA or cable.
| Quote: |
There is no LVD/SE sign on it.
|
What sign is on it then. If nothing, it is not LVD at all which would be fine
except if it is passive and for Ron's possible term. power supply case.
| Quote: |
Tell everything about it in the detailed description of the entire cabling &
device setup to the HBA requested above. |
|
|
| Back to top |
|
|
Michael Perkonigg
Guest
|
| Posted:
Thu Jun 30, 2005 8:38 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
On 2005-06-30, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
| Quote: | Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator. How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
|
I have a HP DLT80e drive which has an LVD/SE connector (well, two) on the
back.
I got 2 SCSI-2 50pins to SCSI-3 68pins cables to connect the drive
to a HBA.
I have two Adaptec 2940 (one 2940, one 2940U) for PCs, a Sun SparcStation SCSI,
I tried a VAXstation external SCSI, an old DPT HBA with SCSI2 external,
none of them could see a device, some even hang on scanning the bus.
The only HBA which recognized my drive and was able to talk to it was a
Adaptec wide controller onboard a PC mainboard I have sitting in a corner.
Yes, I used another cable (SCSI3-SCSI3).
The ids are set correctly on all devices (HBA and drive) and all have
been terminated correctly (HBAs internally but manually where possible,
the drive externally with a dataMate SCSI3 terminator DM2750-02-68ADR).
I am not exactly sure about it but I think this wide HBA has an internal LVD
channel connected to the external connector panel.
The external drive has TERM PWR set by default (I checked that).
So the question is: are both SCSI2 to SCSI3 cables broken? That's unlikely.
Is the narrow-to-wide setting the problem?
Are the HBAs unable to set the drive to SE mode? Why? Is the terminator
not compatible to SE? The former user of this drive used it with a Mylex
or ICP with external LVD connectors (I got the cables but don't own
a HBA with this high density connectors).
The LVD capable newer 2940 seem to have LVD on the external connector too
because HP mentions as ideal HBA for this drive a 19160 or a 2940U2W.
Thanks,
Mike |
|
| Back to top |
|
|
Folkert Rienstra
Guest
|
| Posted:
Thu Jun 30, 2005 10:06 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at
| Quote: | On 2005-06-30, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator. How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
I have a HP DLT80e drive which has an LVD/SE connector (well, two) on the
back.
I got 2 SCSI-2 50pins to SCSI-3 68pins cables to connect the drive to a HBA.
|
There is no such thing as a SCSI-2 to a SCSI-3 cable. That's idiot speak out of
a catalog. There is such thing as a 50pins to 68pins cable. It can take several
forms depending of whether low density, HD or VHD connectors are used.
| Quote: | I have two Adaptec 2940 (one 2940, one 2940U) for PCs, a Sun SparcStation SCSI,
I tried a VAXstation external SCSI, an old DPT HBA with SCSI2 external,
|
Just use wide or narrow, will ya. SCSI-2 is wide as well.
| Quote: | none of them could see a device, some even hang on scanning the bus.
The only HBA which recognized my drive and was able to talk to it was a
Adaptec wide controller onboard a PC mainboard I have sitting in a corner.
Yes, I used another cable (SCSI3-SCSI3).
|
Then I suspect your cable.
| Quote: | The ids are set correctly on all devices (HBA and drive) and all have
been terminated correctly (HBAs internally but manually where possible,
the drive externally with a dataMate SCSI3 terminator DM2750-02-68ADR).
|
http://www.selectronix.co.uk/products/ca/techdocs/dm2750.pdf
Sounds like an active SE terminator.
| Quote: | I am not exactly sure about it but I think this wide HBA has an internal LVD
channel connected to the external connector panel.
|
In that case with what speed did the HBA recognize the drive?
| Quote: |
The external drive has TERM PWR set by default (I checked that).
So the question is: are both SCSI2 to SCSI3 cables broken? That's unlikely.
|
Depends. Diffsens is on the row that usually only has some 20-odd ground lines
which aren't always all connected. They may have left out the diffsens line too.
| Quote: | Is the narrow-to-wide setting the problem?
|
Nope, no problem.
| Quote: | Are the HBAs unable to set the drive to SE mode?
|
That's what I suspect, but blame the cable for.
Adaptec 2940 certainly have diffsens grounded.
| Quote: | Why? Is the terminator not compatible to SE?
|
Looks fine.
| Quote: | The former user of this drive used it with a Mylex or
ICP with external LVD connectors (I got the cables but
don't own a HBA with this high density connectors).
The LVD capable newer 2940 seem to have LVD on the external connector too
because HP mentions as ideal HBA for this drive a 19160 or a 2940U2W.
Thanks,
Mike |
|
|
| Back to top |
|
|
Ron Reaugh
Guest
|
| Posted:
Thu Jun 30, 2005 10:33 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Folkert Rienstra" <see_reply-to@myweb.nl> wrote in message
news:42c41d88$1$47992$892e7fe2@authen.white.readfreenews.net...
| Quote: | "Ron Reaugh" <ron-reaugh@worldnet.att.net> wrote in message
news:wwOwe.1053324$w62.669390@bgtnsc05-news.ops.worldnet.att.net
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42c3a805$0$21824$91cee783@newsreader02.highway.telekom.at...
On 2005-06-23, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
"Michael Perkonigg" blablu@gmx.net> wrote in message
news:42ba885f$0$21824$91cee783@newsreader02.highway.telekom.at...
Hello,
I wonder if I buy an extern SCSI-3 LVD/SE terminator, it is
multimode.
Or are there LVD/SE terminators which are not multimode
terminators?
Is "multimode" a special feature or can I assume that a terminator
which supports LVD/SE is always a "multimode" one?
What feature/functionality of "multimode" is of concern to you? Why
are you
concerned that a plain LVD/SE terminator wont do the job?
Well I have problems with an external LVD tape drive and some narrow
HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator.
That is for a passive terminator. They can for an active terminator.
|
Nope, not always. I've seen it myslef.
| Quote: | How EXACTLY is the setup currently cabled? Cabling a narrow SE HBA
to an external LVD tape drive isn't a trivial cabling case.
It should be. And if it isn't it isn't something you can observe from
outside. |
HUH? Think about 68p-50p externally, cracker.
| Quote: | So I thought that the terminator I have might be the problem.
Probably is but then there are more mines in the field.
Such as diffsens signal not connected in HBA or cable.
There is no LVD/SE sign on it.
What sign is on it then. If nothing, it is not LVD at all which would be
fine
except if it is passive and for Ron's possible term. power supply case.
Tell everything about it in the detailed description of the entire
cabling &
device setup to the HBA requested above. |
|
|
| Back to top |
|
|
Ron Reaugh
Guest
|
| Posted:
Thu Jun 30, 2005 10:38 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at...
| Quote: | On 2005-06-30, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
Well I have problems with an external LVD tape drive and some narrow
HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator.
How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
I have a HP DLT80e drive which has an LVD/SE connector (well, two) on the
back.
|
The first thing to try is open the enternal box and see if the drive has a
jumper that forces SE mode. Set the force SE state and all will probably
start working.
| Quote: | I got 2 SCSI-2 50pins to SCSI-3 68pins cables to connect the drive
to a HBA.
I have two Adaptec 2940 (one 2940, one 2940U) for PCs, a Sun SparcStation
SCSI,
I tried a VAXstation external SCSI, an old DPT HBA with SCSI2 external,
none of them could see a device, some even hang on scanning the bus.
The only HBA which recognized my drive and was able to talk to it was a
Adaptec wide controller onboard a PC mainboard I have sitting in a corner.
Yes, I used another cable (SCSI3-SCSI3).
The ids are set correctly on all devices (HBA and drive) and all have
been terminated correctly (HBAs internally but manually where possible,
the drive externally with a dataMate SCSI3 terminator DM2750-02-68ADR).
I am not exactly sure about it but I think this wide HBA has an internal
LVD
channel connected to the external connector panel.
The external drive has TERM PWR set by default (I checked that).
So the question is: are both SCSI2 to SCSI3 cables broken? That's
unlikely.
Is the narrow-to-wide setting the problem?
Are the HBAs unable to set the drive to SE mode? Why? Is the terminator
not compatible to SE? The former user of this drive used it with a Mylex
or ICP with external LVD connectors (I got the cables but don't own
a HBA with this high density connectors).
The LVD capable newer 2940 seem to have LVD on the external connector too
because HP mentions as ideal HBA for this drive a 19160 or a 2940U2W.
Thanks,
Mike |
|
|
| Back to top |
|
|
Ron Reaugh
Guest
|
| Posted:
Thu Jun 30, 2005 11:32 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at...
| Quote: | The external drive has TERM PWR set by default (I checked that).
|
That resolves any potential TERM PWR shortage.
| Quote: | So the question is: are both SCSI2 to SCSI3 cables broken? That's
unlikely. |
Right.
| Quote: | Is the narrow-to-wide setting the problem?
Are the HBAs unable to set the drive to SE mode? Why?
|
Diffsens. Force SE mode with a jumper onboard the tape drive. |
|
| Back to top |
|
|
Folkert Rienstra
Guest
|
| Posted:
Fri Jul 01, 2005 3:50 am Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Ron Reaugh" <ron-reaugh@worldnet.att.net> wrote in message news:WUWwe.1055718$w62.374060@bgtnsc05-news.ops.worldnet.att.net
| Quote: | "Michael Perkonigg" <blablu@gmx.net> wrote in message news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at...
The external drive has TERM PWR set by default (I checked that).
That resolves any potential TERM PWR shortage.
So the question is: are both SCSI2 to SCSI3 cables broken? That's unlikely.
Right.
|
Wrong.
| Quote: |
Is the narrow-to-wide setting the problem?
Are the HBAs unable to set the drive to SE mode? Why?
Diffsens.
|
Shameless copyist!
| Quote: | Force SE mode with a jumper onboard the tape drive.
|
See!?. That's only necessary if the diffsens signal isn't delivered
to the drive, either missing on the card or not routed via the cable.
Since the 2940 cards definitely have diffsens grounded (=SE),
that obviously leaves the cables. |
|
| Back to top |
|
|
Ron Reaugh
Guest
|
| Posted:
Fri Jul 01, 2005 7:08 am Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Folkert Rienstra" <see_reply-to@myweb.nl> wrote in message
news:42c48577$1$48006$892e7fe2@authen.white.readfreenews.net...
| Quote: | "Ron Reaugh" <ron-reaugh@worldnet.att.net> wrote in message
news:WUWwe.1055718$w62.374060@bgtnsc05-news.ops.worldnet.att.net
"Michael Perkonigg" <blablu@gmx.net> wrote in message
news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at...
The external drive has TERM PWR set by default (I checked that).
That resolves any potential TERM PWR shortage.
So the question is: are both SCSI2 to SCSI3 cables broken? That's
unlikely.
Right.
Wrong.
Is the narrow-to-wide setting the problem?
Are the HBAs unable to set the drive to SE mode? Why?
Diffsens.
Shameless copyist!
Force SE mode with a jumper onboard the tape drive.
See!?. That's only necessary if the diffsens signal isn't delivered
to the drive, either missing on the card or not routed via the cable.
|
Wacko plagiarist couldn't think of it himself so he claims it was his
idea.... cookoo. |
|
| Back to top |
|
|
Michael Perkonigg
Guest
|
| Posted:
Thu Jul 14, 2005 1:02 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
On 2005-06-30, Folkert Rienstra <see_reply-to@myweb.nl> wrote:
| Quote: | "Michael Perkonigg" <blablu@gmx.net> wrote in message news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at
On 2005-06-30, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator. How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
I have a HP DLT80e drive which has an LVD/SE connector (well, two) on the
back.
I got 2 SCSI-2 50pins to SCSI-3 68pins cables to connect the drive to a HBA.
There is no such thing as a SCSI-2 to a SCSI-3 cable. That's idiot speak out of
a catalog. There is such thing as a 50pins to 68pins cable. It can take several
forms depending of whether low density, HD or VHD connectors are used.
I have two Adaptec 2940 (one 2940, one 2940U) for PCs, a Sun SparcStation SCSI,
I tried a VAXstation external SCSI, an old DPT HBA with SCSI2 external,
Just use wide or narrow, will ya. SCSI-2 is wide as well.
none of them could see a device, some even hang on scanning the bus.
The only HBA which recognized my drive and was able to talk to it was a
Adaptec wide controller onboard a PC mainboard I have sitting in a corner.
Yes, I used another cable (SCSI3-SCSI3).
Then I suspect your cable.
|
But! It works with an Adaptec 19160 HBA. This one is narrow SE externally
I think, just like the 2940 I tried before.
| Quote: | The ids are set correctly on all devices (HBA and drive) and all have
been terminated correctly (HBAs internally but manually where possible,
the drive externally with a dataMate SCSI3 terminator DM2750-02-68ADR).
http://www.selectronix.co.uk/products/ca/techdocs/dm2750.pdf
Sounds like an active SE terminator.
|
But! It works with a Mylex DAC960 which has an external wide LVD connector.
If this is an SE terminator wouldn't it get problems?
| Quote: | I am not exactly sure about it but I think this wide HBA has an internal LVD
channel connected to the external connector panel.
In that case with what speed did the HBA recognize the drive?
|
Will check that tomorrow.
| Quote: | The external drive has TERM PWR set by default (I checked that).
So the question is: are both SCSI2 to SCSI3 cables broken? That's unlikely.
Depends. Diffsens is on the row that usually only has some 20-odd ground lines
which aren't always all connected. They may have left out the diffsens line too.
Are the HBAs unable to set the drive to SE mode?
That's what I suspect, but blame the cable for.
Adaptec 2940 certainly have diffsens grounded.
Why? Is the terminator not compatible to SE?
Looks fine.
The former user of this drive used it with a Mylex or
ICP with external LVD connectors (I got the cables but
don't own a HBA with this high density connectors).
|
I got a Mylex, see above.
There are some other problems regarding the Mylex HBA though.
Thanks,
Mike |
|
| Back to top |
|
|
Folkert Rienstra
Guest
|
| Posted:
Thu Jul 14, 2005 8:04 pm Post subject:
Re: Is a LVD/SE terminator multimode? |
|
|
"Michael Perkonigg" <blablu@gmx.net> wrote in message news:42d61c1c$0$27838$91cee783@newsreader02.highway.telekom.at
| Quote: | On 2005-06-30, Folkert Rienstra <see_reply-to@myweb.nl> wrote:
"Michael Perkonigg" <blablu@gmx.net> wrote in message news:42c411de$0$25828$91cee783@newsreader01.highway.telekom.at
On 2005-06-30, Ron Reaugh <ron-reaugh@worldnet.att.net> wrote:
Well I have problems with an external LVD tape drive and some narrow HBAs
and I don't know exactly what the problem is.
Some narrow HBAs can't supply sufficient power for a wide terminator. How
EXACTLY is the setup currently cabled? Cabling a narrow SE HBA to an
external LVD tape drive isn't a trivial cabling case.
I have a HP DLT80e drive which has an LVD/SE connector (well, two) on the
back.
I got 2 SCSI-2 50pins to SCSI-3 68pins cables to connect the drive to a HBA.
There is no such thing as a SCSI-2 to a SCSI-3 cable. That's idiot speak out of
a catalog. There is such thing as a 50pins to 68pins cable. It can take several
forms depending of whether low density, HD or VHD connectors are used.
I have two Adaptec 2940 (one 2940, one 2940U) for PCs, a Sun SparcStation SCSI,
I tried a VAXstation external SCSI, an old DPT HBA with SCSI2 external,
Just use wide or narrow, will ya. SCSI-2 is wide as well.
none of them could see a device, some even hang on scanning the bus.
The only HBA which recognized my drive and was able to talk to it was a
Adaptec wide controller onboard a PC mainboard I have sitting in a corner.
Yes, I used another cable (SCSI3-SCSI3).
Then I suspect your cable.
But! It works with an Adaptec 19160 HBA.
|
Well, that is a new element. Now all bets are off.
| Quote: | This one is narrow SE externally I think, just like the 2940 I tried before.
The ids are set correctly on all devices (HBA and drive) and all have
been terminated correctly (HBAs internally but manually where possible,
the drive externally with a dataMate SCSI3 terminator DM2750-02-68ADR).
http://www.selectronix.co.uk/products/ca/techdocs/dm2750.pdf
Sounds like an active SE terminator.
But! It works with a Mylex DAC960 which has an external wide LVD connector.
If this is an SE terminator wouldn't it get problems?
|
No, that should work fine, as it apparently does.
As also witnessed by the successful use of the 19160.
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I am not exactly sure about it but I think this wide HBA has an internal LVD
channel connected to the external connector panel.
In that case with what speed did the HBA recognize the drive?
Will check that tomorrow.
The external drive has TERM PWR set by default (I checked that).
So the question is: are both SCSI2 to SCSI3 cables broken? That's unlikely.
Depends. Diffsens is on the row that usually only has some 20-odd ground lines
which aren't always all connected. They may have left out the diffsens line too.
Are the HBAs unable to set the drive to SE mode?
That's what I suspect, but blame the cable for.
Adaptec 2940 certainly have diffsens grounded.
Why? Is the terminator not compatible to SE?
Looks fine.
The former user of this drive used it with a Mylex or
ICP with external LVD connectors (I got the cables but
don't own a HBA with this high density connectors).
I got a Mylex, see above.
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Presumably as in: I did get myself a Mylex.
And apparently a 19160 too. Any other new surprises?
| Quote: | There are some other problems regarding the Mylex HBA though.
Thanks,
Mike |
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