Can't disable ECC via micsmc command

[Chao_M_]

Hi all,

I failed to disable ECC by "micsmc --ecc disable", the output is:

Information: disabling ECC on devices: mic0...

Information: 1 of 1 complete

Status: mic0: error: cannot set ECC mode: device is not in 'ready' state

I checked the status of the MIC card:

mic0: online (mode: linux image: /usr/share/mpss/boot/bzImage-knightscorner)

Did I do something wrong? Any suggestion how to solve it?

Thank you,

Chao

[Leonardo_B_Intel]

Hi Chao,

Would you mind trying something like:

Check ECC status:

# micsmc --ecc status

Turn off ECC:

# micctrl -r

# micctrl -w

# micsmc  --ecc disable

# service mpss restart

Check ECC status:

# micsmc --ecc status

Best,

Leo.

[Chao_M_]

Thanks you, Leo. It works!

Would you mind explain the difference between the status of "ready" and "online", it seems I can't change ECC when MIC card is online.

Thank you,

Chao

[Leonardo_B_Intel · Accepted solution]

Hello Chao,

Glad to hear it worked for you.

For additional information, you may want to take a look at the MPSS documentation. Most likely the MPSS_Users_Guide.pdf from your installation. The section “State SYSFS Entries” should describe all the possible states. Here's what I read for my version:

ready: card is ready for a boot command

booting: card is currently booting

no response: card is not responding

boot failed: card failed to boot

online: card is currently booted

shutdown: card is currently shutting down

lost: booted card is not responding

resetting: card is processing soft reset

reset failed: card cannot be reset - non recoverable

I am not a specialist on MPSS but I think the case here is that an action like enabling/disabling ECC cannot be performed on a “online” state because it requires changes on the memory configuration. This it can be only performed on “ready” state, that is, before the actual boot of the card.

Best,

Leo.

[Chao_M_]

Thank you, Leo.

Chao