Disk Enclosures

HpCISSs3 Event ID 5012 I/O being retried

Occasional Contributor

HpCISSs3 Event ID 5012 I/O being retried

Hi everyone,



We have a C7000 blade enclosure with 2 x HP 6Gb SAS BL Switch on them, connected to 7 x D2700 disk enclosures via 2 eSAS cables each, dual domain enabled.

In this Enclosure a ProLiant BL660c Gen8 with Smart Array P731m (BBWC enabled, Write 100%) connected to some of the disks from multiple D2700 enclosures (RAID50 from 18 x SAS dual port disks and RAID10 from 8 x SSD single port).

There are other servers on the same enclosure working with the same storage, but they are not loaded heavily on disk I/O, and do not have this issue.



There are disk read performance problems. Read performance is way below the specs. Write is a bit better, but still not reaching the specs.

Once the load on the disk increases, we are getting numerous events in the event log only on the mentioned blade (OS: Windows Server 2008 R2 Sp1).


Can somebody please explain what these events mean, I have failed to find the description in the web.


Log Name:      System
Source:        HpCISSs3
Date:          2014.05.21 21:26:54
Event ID:      5012
Task Category: None
Level:         Information
Keywords:      Classic
User:          N/A
Computer:      ******
On controller (bus 6, device 0, function 0) I/O failed for 28.  I/O being retried via RAID path for LUN (0, 1, 1).
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
    <Provider Name="HpCISSs3" />
    <EventID Qualifiers="17408">5012</EventID>
    <TimeCreated SystemTime="2014-05-21T18:26:54.079860200Z" />
    <Security />


Thank You for Your help.





P.S. This thread has been moved from General to Disk array. - Hp Forum Moderator

Patrick Neuner
Regular Advisor

Re: HpCISSs3 Event ID 5012 I/O being retried

did you ever figure it out?