ollie-red
1 Copper

poweredge 2900 degraded link width error

Hi all,

we have here a poweredge 2900 server which halts during the bios checks after a reboot 
with the following error:

degraded link width error: embedded i/o bridge device 1
expected link width is x4
actual link width is x1

There is only one PCIe card (video) sitting in the slots. I've done the following tests:
i replugged the video card, disconnect power cable and wait some time, but nothing helps.

Every hint is welcome

Thanks in advance

Ollie

0 Kudos
4 Replies
Dev Mgr
5 Rhenium

Re: poweredge 2900 degraded link width error

That error is most likely related to the PERC5i or PERC6i that's in the server. These use a x4 SAS channel (4 x 300MByte/s) for bandwidth and failover/redundancy. It sounds like something is wrong with the PERC, the cable, or the backplane.

 

You may want to open a case with Dell PowerEdge support. To be a step ahead of them, you could run a DSET on the server (support.dell.com/dset) for them to look at.

Member since 2003

0 Kudos
ollie-red
1 Copper

Re: poweredge 2900 degraded link width error

i've also taken the PERCI6i interface card out, but booting stops at the same test. Resetting the system to the default values helps not. So i believe there is no chance to run any operation system.

Does anyone has more ideas?

0 Kudos
Highlighted
ricepower
1 Copper

Re: poweredge 2900 degraded link width error

I do encounter this link width error problem with our HPC clusters. Could you pls look over on the bmc sel log which device id is causing the link width error? . I suspect it's either the internal nic or LOM,  or the chipset.

Anyhow, the only solution is to replace the mainboard.

Tags (1)
0 Kudos
CalebHart
1 Copper

Re: poweredge 2900 degraded link width error

Hi all,

we have here a poweredge 2950 server which halts during the bios checks after a reboot 
with the following error:

degraded link width error: embedded i/o bridge device 18
expected link width is x8
actual link width is x4

system halted!

Tags (1)
0 Kudos