[Bug 60644] MPT2SAS drops all HDDs when under high I/O

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60644

--- Comment #11 from Sreekanth Reddy <sreekanth.reddy@lsi.com> ---
Hi,

Thanks for providing the logs.

>From the logs what I observed is that controller is going in to the non
operational state and so we are seeing the messages "mpt2sas0:
_base_fault_reset_work : SAS host is non-operational !!!!". 

So once the controller stays in this state then driver will remove this
controller's host entry from the scsi mid layer ( i.e. HBA's host is removed
from the /sys/class/scsi_host/hostX). And hence your are observing that all the
drivers attached to this controller are dropped.

But still I am not sure why controller enters in to the non-operational state. 
So,  I thought to reproduce this locally, So can you please help me in
reproducing this issue i.e. can you please tell me the steps and which utils
with cmds your are used to reproduce this issue.

Regards,
Sreekanth

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