Mellanox Switches - Tips & Tricks

[Kahooli]

dd cloning SN2700 image: from 256gb mSATA to a 64gb mSATA.

dd cloning operation is failing, here are the commands I have tried.

sudo dd status=progress if=/dev/sd256 of=/dev/sd64 bs=4096 conv=notrunc,noerror

sudo dd status=progress if=/dev/sd256 of=/dev/sd64 bs=512 count= 69206016

What is the proper command?

dd is kinda dumb. it does exactly what you tell it to do.
Do you know the exact block layout of the source drive? Since your target is smaller, you need to know where the partition boundaries are and what is empty space to skip/resize. The partition table if you just block copy the drive is going to specify end blocks that dont exist in the target drive.

 

[nasbdh9]

.

upload 3.10.4206

 

[awedio]

sn2700s are funny, they want 9600, but update them, and new onyx wants 115200... but get into old bios.. yeah 9600

I'm now able to use 115200 from boot up/bios all the way !

 

[awedio]

Messing around with a SN2700 o/s re-install.
I keep getting this error.
Any ideas?

Error: Partition doesn’t exist.

== Creating ext3 filesystem on /dev/sda10 for VAR

mke2fs: No such device or address while trying to determine filesystem size

*** Could not make filesystem on /dev/sda10

== Cleanup

Finally figured out why!

 

[klui]

Well don't be greedy and leave people on the edge. Why?

 

[awedio]

Well don't be greedy and leave people on the edge. Why?

I did't think anyone else was interested since I was the only person with that error!

 

[awedio]

Finally figured out why!

ONIE install has to be the non-UEFI version.

 

[klui]

I for one am interested! I just don't have many of the equipment talked about here but sometimes solutions could be applied to other cases.

 

[ano]

so non uefi will update the serial settings/bios further? interesting

 

[awedio]

I'm able to take a switch, add a new SSD, embed ONIE (non-UEFI) and then install 3.10.4206 (one shot).
All at 115,200.

 

[ano]

interesting, I could mess with it, but units still have support contract, so hmm , but having a spare ssd for them would be great as they are getting old

 

[awedio]

Just clone the SSD.
It's just like having a spare tyre/tire!

 

[awedio]

I'm able to take a switch, add a new SSD, embed ONIE (non-UEFI) and then install 3.10.4206 (one shot).
All at 115,200.

Recovery ISO image used is ONIE v2019.11-5.2.0020 – 115200

 

[awedio]

so non uefi will update the serial settings/bios further? interesting

 

[SadoKitten]

What 40G transceivers are supported on this switch?

 

[ano]

which switch i this switch? usually for 40g, apart from that, pretty much all 40g are supported on all 100 and 40g mellanox

 

[dbTH]

which switch i this switch? usually for 40g, apart from that, pretty much all 40g are supported on all 100 and 40g mellanox

Not all brands of third party transceivers are made the same. Some may have firmware issue. The best is to get the Mellanox "compatible" one

 

[up3up4]

upload 3.10.4206

i have X86_64-3.10.4206-installer.bin and X86_64-3.9.3202-installer.bin

Could you share a link for " X86_64-3.10.4206-installer.bin "?

 

[up3up4]

After the SN2700 DC power supply is replaced with a Liteon AC power supply, Power Supply 1/2 is unresponsive. How can I read/modify the i2c/pmbus information of the power supply?

 

[SadoKitten]

Is there anything we need to do after plugging in the breakout cable?