Tape Libraries and Drives
cancel
Showing results for 
Search instead for 
Did you mean: 

50-pin or 68-pin ?

SOLVED
Go to solution
Mike Fisher_1
Frequent Advisor

50-pin or 68-pin ?

Hi all

THE BACKGROUND:
A Client has a racked G50 with a racked 20/40Gb drive attached

THE REQUIREMENT:
I want to daisy chain a DLT-7000 to the the existing Drive so I must provide the correct cable connection

THE QUESTION:
How do I find out if the 20/40Gb drive is 50-pin or 68-pin?

THE RESTRICTIONS
Can't look at the back of the device until next week, but need the answer today

Client claims an I/O scan doesn't give a clue

DOES THIS HELP?
The old HP support contract gives the part # for the 20/40gB device as TTZATA1
[PartSurfer & Google yield no results when I plug that code in]

Thank you!
Regards
Mike

 

 

P.S. This thread has been moved from General to Tape Libraries and Drives. - Hp Forum Moderator

Time flies like an arrow. Fruit flies prefer a banana.
17 REPLIES
Bill McNAMARA_1
Honored Contributor

Re: 50-pin or 68-pin ?

try http://partsurfer.hp.com/
It works for me (tm)
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

Bill - Zilch
Time flies like an arrow. Fruit flies prefer a banana.
Stefan Farrelly
Honored Contributor
Solution

Re: 50-pin or 68-pin ?

The I/O scan WILL show you if its 50 or 68 pin.
eg;

ext_bus 2 10/8 c720 CLAIMED INTERFACE GSC add-on Fast/Wide SCSI Interface
target 17 10/8.2 tgt CLAIMED DEVICE
tape 4 10/8.2.0 stape CLAIMED DEVICE Quantum DLT4000

You can see from this the Quantum DLT4000 (20/40Gb) is on a Fast/Wise (68pin) SCSI bus.

Or a single ended DLT from ioscan looks like this;

xt_bus 7 10/16/8 scsi1 CLAIMED INTERFACE HP 28655A - SE SCSI ID=7
target 26 10/16/8.0 target CLAIMED DEVICE
tape 1 10/16/8.0.0 tape2 CLAIMED DEVICE HP 7980S

As you can see the scsi controller listed before the DLT drive (a TTI 20/40Gb DLT) is SE SCSI (50 pin).

Im from Palmerston North, New Zealand, but somehow ended up in London...
Bill McNAMARA_1
Honored Contributor

Re: 50-pin or 68-pin ?

oops sorry, you used the partsurfer I guess!

Did you try to locate it at:
http://hp.com/go/cposupport
It works for me (tm)
harry d brown jr
Honored Contributor

Re: 50-pin or 68-pin ?


If you have visio, you can use this to get stencils and then ask the client to describe the back of the machine, or digitally take a picture of it!

http://www.sisp.hp.com/SISP/LoginFrame.tcl?area=stencils&doc=info/VisioStencils



live free or die
harry
Live Free or Die
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

Harry
See "restrictions"

Stefan
Seems like a TOP TIP to me - will let you all know how I get on

I get three wise Pharaoh's in a row - is it Christmas? Bless your desert boots one 'n' all

Regards - Mike



Time flies like an arrow. Fruit flies prefer a banana.
Vincent Farrugia
Honored Contributor

Re: 50-pin or 68-pin ?

Hello,

I guess the racked 20/40Gb drive is a DLT4000 drive. But what type of DLT4000 drive is it? Shouldn't be 68 pin, that's for sure. Should be 50 pin. Some older drives had the centronics port though, so beware.

As a rule... SCSI SE = 50 pin. DLT7000 is SCSI-2 SE. If I remember correctly, that should be 68-pin.

HTH,
Vince
Tape Drives RULE!!!
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

AND a Maltese King !
Time flies like an arrow. Fruit flies prefer a banana.
Dave Unverhau_1
Honored Contributor

Re: 50-pin or 68-pin ?

Mike,

I'm not a pharoah or a maltese king, but I have worked on DLT4000s and DLT7000s.

(that is NOT, incidentally, intended to be disparaging in any way...you guys are the greatest!)

The problem you are going to run into is that the DLT4000 is a single-ended SCSI device and the DLT7000 is a Fast-Wide Differential SCSI device. The two will not work on the same bus, unless a single-ended - to - differential converter is employed. You would not want to do that in any event, as a DLT7000 will saturate an HP-PB FWD SCSI interface when it streams data. (You could get away with other FWD SCSI devices on the bus with a DLT7000, as long as you could ensure that they weren't tansferring data concurrently with the DLT7000, but it's not a good idea.)

If you're going to install a DLT7000 drive on a G50, you're going to want to want to attach it to a FWD SCSI card by itself, if at all possible. The FWD SCSI interface for the NOVA class systems is a 28696A. This ID should be visible in the output of an ioscan -fn command.

I hope this helps.

Best Regards,

Dave
Romans 8:28
Dave Unverhau_1
Honored Contributor

Re: 50-pin or 68-pin ?

Mike, one more thing -

The connector on the 28696A interface is (naturally) 68 pins, so connection should be straightforward, as your DLT7000 drive most likely also has a 68-pin connector.

Best Regards,

Dave
Romans 8:28
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

Good morning Dave

That's food for thought
I will bear in mind what you say when I next speak to the client

Will let you know
Time flies like an arrow. Fruit flies prefer a banana.
Rothery Harris
Trusted Contributor

Re: 50-pin or 68-pin ?

Be careful - the HP Surestore DLT70e (C5658A)variant is fast wide single-ended SCSI with a 68 pin high density connector (68pin HDTS).
The SMARTStorage DLT7000 (product number C6374A or C6375A [rack version] are fast wide differential SCSI.
The G50 can be equipped with fast wide differential SCSI or fast narrow single-ended.

Rothery
Vincent Farrugia
Honored Contributor

Re: 50-pin or 68-pin ?

Hello,

DLT7000 drive is a wide differential SE drive and requires a 68-pin connector.

DLT4000 drive is a SE drive and requires a 50 pin connector.

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=lpg51132&locale=en_US&taskId=8414&taskName=setup%2C+install+%26+configure&prodSeriesId=63988&prodTypeId=12169&prodSeriesName=hp+surestore+dlt+70+drives&docId=40558

Connecting the DLT7000 and DLT4000 together on a wide differential HBA would WORK, but SCSI bus would go down to the DLT4000 speed. So DLT7000 would be choked.

Recommendation: Connect these drives on separate HBAs for optimum performance for both.

HTH,
Vince
Tape Drives RULE!!!
Jerry Jaynes
Frequent Advisor

Re: 50-pin or 68-pin ?

In reference to the 68 pin, make sure they tell you if it is a 68 High Density or 68 pin Very High Density.

Also make sure you have the correct cabling to support the fastest speeds.

As said previously, remember that by daisy chaining (if it is possible in this case and I don't think it is), you will not get any faster performance, The bus is going to sync to the slowest item on the chain.

Tell them to bite the bullet, shut it down and reboot.

Good Luck!
Never let 'em see you choke!!
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

To complete this one:

Client has gone for an additional FW 28696A card + DLT-7000

Because all his HP-PB slots are being used he's also going to upgrade to an H60 which doubles his slots

Thanks all for your help
Time flies like an arrow. Fruit flies prefer a banana.
Xavier Gutierrez_1
Frequent Advisor

Re: 50-pin or 68-pin ?

Hi all.

I just would like to point some things out (I do not intend to get points but to clarify some things).

First of all, DLT 4000 is a SE device as Dave said before. That means it's a LOW VOLTAGE device.
DLT 7000 is a Fast Wide Differential device but that does NOT necessarily mean it's LOW VOLTAGE DIFFERENTIAL. It could be HVD and, in such case, the DLT7000 won't degrade to SE but can even damage the controller and/or the DLT4000 when it tries to put it's signal on the bus.
High voltage and low voltage signaling schemes are incompatible at the electrical level and the can only be put together with a HVD-to-SE bus converter.

If the DLT7000 is LVD (I don't know if such a product exists within HP's catalog) it should work fine but both devices will not be usable at the same time without performance degradation of the bus.
Even if you only use one at a time, the performance of the DLT 7000 will be extremely low as the SE bus of the G50 server has a max. troughtput of 10MB/s and the DLT7000 is intended to work on a FWD bus, which is twice as fast as the SE on the G50.

And last but not least, as Vincent pointed out, the type of bus does not tell you the connector on the device. Typically, SE devices have 50-pin centronics or 50-pin high density connectors but some vendors (and HP does, at least in their HVD-to-SE converter) have SE devices and adapters with 68-pin connectors

Best regards to all.

Xavier.
Mike Fisher_1
Frequent Advisor

Re: 50-pin or 68-pin ?

Xavier: 10 points for that useful info
Regards Mike
Time flies like an arrow. Fruit flies prefer a banana.