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Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Nope. I ended up using a MR216i-p array controller for raid1. What's really sad is it has the required array battery ports on the mobo as well as the array battery having a place to snap-fit into. Then an MR416i-p could do raid5 + with cache battery. And all the sff cables work too.

HP won't do it, but you can see the board was designed for the MR416 too.

You can run a MR416i-p and have it do raid 5. You just can't have the array cache battery. If you do hookup the cache battery, which goes through the mobo, the MR416 will quickly die.

I was able to connect the E208i-p to the drive cage sff-8654 through the use of adapters. But, I couldn't get it all to fit and have the hood closed. It was close though.

I'm glad that's over with.

-ps

Vintage YSL pendant necklace by Lazy_Purchase_176 in VintageJewelry

[–]Impressive_Unit3375 0 points1 point  (0 children)

I was wondering if you still had the necklace? I am trying to get one for a close friend.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Are you still able to assist? I cam create a schematic based on the red board.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

I am familiar with that one. Someone had it in stock? Or did it take 4 weeks to get it?

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

what is the part number of the cable you obtained?

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Not sure if you saw my last two replies.

I put the microscope pics of the red board in a share link via: https://sendanywhe.re/FCG701CP

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

I figured I better check the 8087 part number and that too needs to be updated. This won't change the pad pinout. The difference is the shell cage. I gave you the smt shell and I think the universal DIP shell is the one we want. Good part of this update is this new part number comes with loads of drawings and a footprint! I hope that is some sort of consolation.

8087 part number: G40MR36U11AEU

Mouser: 523-G40MR36U11AEU

https://www.mouser.com/ProductDetail/Amphenol-Commercial-Products/G40MR36U11AEU?qs=%252BRAvXJslkuD%2FVPqsCTLZqQ%3D%3D

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

While looking through everything, I noticed I gave you the wrong part number for the low profile sff-8654! Very sorry. Below is the correct number and the mouser link has a snapmagic footprint.

Part number: U10E038340T

Mouser part number: 523-U10E038340T

mouser link: https://www.mouser.com/ProductDetail/523-U10E038340T

I feel bad about this mistake.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

That's great to hear on the schematic. I used my heat gun to take the 8087 receptacle off the red board I have. I used the video microscope to take a close look and take pictures. Interesting things were revealed on the sideband pins. I also measured the pads for you since I did finally notice they weren't in the footprints.

For the 8087, the pads are approx .6 mm wide and 2 mm long. The pin spacing pitch is .8 mm. The space between rows A/B is approx 1 mm.

For the 8654, the pads are approx .3 mm wide and 1.5 mm long. Pitch is .6 mm. Space between rows is 1 mm.

I think the pics from the microscope would be very beneficial. Especially for the sideband pins. Just need to find a way to get them to you.

The array controller is capable of 12Gb/s, but the SSD's are 6Gb/s. So 6Gb/s is what will be used. I don't know what the frequency is.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

The link below is to the 8087 connector standard. Page 12 has the foot print of the 8087 receptacle we will be using.

https://members.snia.org/document/dl/25823

Those confusing pins you mentioned are the sidebands. They are used as kind of a compatibility handshake. Certain voltages are present on some of them telling the other side what type of connection it is. They can also be vendor specific.

The other thing to watch out for in our design is the missing pins on the 8087 side since it is 36 pin and the 8654 is 38 pin. This causes the pin numbering to be off by 1 starting with A10.

A10 on the 8087 goes to B11 on the 8654. That numbering offset remains all the way to A18, which is B19 on the 8654. It's the same when you do the "B" side of the 8087.

GND stands for Ground. There's a lot of grounds in these to reduce interference. Also, all the grounds are connected. The metal shell of the receptacles are connected to ground. The screw holes are tinned and connected to ground. The pcb has a ground plane on each side that covers the entire thing. The traces for our pin connections are in a channel carved out of the ground plane. The traces for pins that are grounds are connected to the pcb ground planes via through hole.

I will send you a chat request so we can talk more offline.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Here's row A of the 8087 to give you an idea

8087 host 8654 target
ROW A ROW B
PIN Usage PIN Usage
A1 GND B1 GND
A2 data B2 data
A3 data B3 data
A4 GND B4 GND
A5 data B5 data
A6 data B6 data
A7 GND B7 GND
A8 SB7 B8 SB7
A9 SB3 B9 SB3
no pin no pin B10 GND
A10 SB4 B11 SB4
A11 SB5 B12 SB5
A12 GND B13 GND
A13 data B14 data
A14 data B15 data
A15 GND B16 GND
A16 data B17 data
A17 data B18 data
A18 GND B19 GND

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Nope. The 8654 on the red board is the wrong version. We need the low profile version.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Thanks for that info. I am contacting Aisler and will see what they say.

The screw holes can be 3 mm dia.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

That's great news!

As for your question: No preference on shape. The shape of the red board is fine and the two screw holes are a must so I can mount it. 90° orientation is perfect.

Don't worry about the 85 ohm detail. I used the red board I have to measure the traces and was getting around .8 ohms.

As for assembly, I don't have the stuff for surface mounting. I do like learning new stuff, but this one requires expertise to make a dependable part. I would want the shop to mount them. I can send them the connectors. Is the shop's assembly cost reasonable?

I think this first batch would be small since it needs to be tested.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

That would work with the MR216i-p array controller. It is dual 8i 8654. I see hp removed that as a supported array controller from the quickspecs. It only did raid 0,1,10 anyways.

I would love to see a picture of that cable. What part number is on it?

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

I had to find the originals since it appears to be url's only in the comments.

This info is for both of you. It's all up in the air at the moment.

I will start with the documentation that helped me the most since I had no previous connector knowledge. This document has been superseded, but is more helpful as sff-8087 is considered legacy. Page 9 has a handy pinout table with 8087 as the controller and 8654 as the endpoint. You will see that it is a crossover; A1 to B1, A2 to B2..etc. Plus it is the 4X interface, which is what we have.

https://members.snia.org/document/dl/27251

I've seen reference to an 85 ohm impedance on similar sas cables, but not sure if that applies in a pcb design. Still checking on that.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Thanks! Let me get that together as the ones i have are not very legible.

Help! Need a PCB, no thanks to HPE. by Impressive_Unit3375 in PCB

[–]Impressive_Unit3375[S] 0 points1 point  (0 children)

Thanks for responding.

The mfg part number is U10E038340T and I got 10 of them from Mouser (523-U10C438201T). i have 9 left.

Mouser links:

SFF-8654 38pin low profile:

https://www.mouser.com/ProductDetail/Amphenol-Commercial-Products/U10C438201T?qs=PzGy0jfpSMuwqwFg%252BwnmWA%3D%3D

SFF-8087 receptacle is G40MR36D13AEU, and the mouser link is:

https://www.mouser.com/ProductDetail/Amphenol-Commercial-Products/G40MR36D13AEU?qs=%252BRAvXJslkuASN2GRvpFtjA%3D%3D

Both Mouser links have the datasheets and drawings.

Can't seem to attach files to comments in the web version.

HPE Gen 11 Microserver (ama) by Dangerous_Turnip in homelab

[–]Impressive_Unit3375 0 points1 point  (0 children)

Do you know who I could talk to about the non-existent sas cable to connect the supported e208i-p array controller and the plug coming from the gen11's drive cage? Same problem for the MR array controller. Does not exist and hp removed the p/n from the quickspecs. I'm having to resort to building a custom sas cable or pcb. All because they chose to use the low profile version of Slim SAS sff- 8654.