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Bug #1032

mpt_sas driver bottlenecks badly with single misbehaving disk on controller

Added by Rich Ercolani almost 9 years ago. Updated almost 9 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
kernel
Start date:
2011-05-14
Due date:
% Done:

0%

Estimated time:
Difficulty:
Medium
Tags:
needs-triage

Description

While burning in a set of 106 drives, I noticed the following fascinating behavior.

I would normally get blazing-fast performance out of the system, but occasionally everything would just stop responding to keyboard requests or any queries about the pool for over a minute. The activity lights would also go idle.

It turned out this behavior occurred whenever certain disks were plugged into the backplane.

dmesg fills with the attached excerpt ad-infinitum until disk is removed.


Files

mpt_sas_error.log (2.28 KB) mpt_sas_error.log dmesg snippet Rich Ercolani, 2011-05-14 01:48 AM

Related issues

Related to illumos gate - Bug #1069: IO hang with bad disk on mpt and mpt_sasNew2011-05-26

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History

#1

Updated by Rich Ercolani almost 9 years ago

Ah, I almost forgot.

OpenIndiana 148.

  1. uname -a
    SunOS zettabyte 5.11 oi_148 i86pc i386 i86pc
#2

Updated by Rich Ercolani almost 9 years ago

One last snippet I should have included - the controllers are two LSI 9201-16e and a 9201-16i. Behavior has been observed on both. All running latest (as of writing) firmware (BIOS: 7.17.00.00; FW: 9.00.00.00). Backplanes are from two SC847E26-RJBOD1 chassis, headnode with the controllers in it is an SC836E26-R1200.

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