Dual port SAS Logzilla device will show only a single SAS port operational in some cases in slot 23 of an Oracle DiskShelf JBOD.

Asset ID:	1-73-1307373.1
Update Date:	2011-05-02
Keywords:

Solution Type FAB (standard) Sure

Solution 1307373.1 : Dual port SAS Logzilla device will show only a single SAS port operational in some cases in slot 23 of an Oracle DiskShelf JBOD.

Applies to:

Sun Storage 7410 Unified Storage System - Version: Not Applicable to Not Applicable - Release: N/A to N/A
Sun ZFS Storage 7420 - Version: Not Applicable to Not Applicable   [Release: N/A to N/A]
Sun ZFS Storage 7120 - Version: Not Applicable to Not Applicable   [Release: N/A to N/A]
Sun ZFS Storage 7320 - Version: Not Applicable to Not Applicable   [Release: N/A to N/A]
Sun Storage 7310 Unified Storage System - Version: Not Applicable to Not Applicable   [Release: N/A to N/A]
Information in this document applies to any platform.
__________

SUNBUG: 7006003

Affected X-Options:

DS2X-LOGZ

Affected Parts:

542-0286 - 18GB SAS Solid State Drive Assembly

Symptoms

In the absence of any other known problems in the fabric (health checks have been run and passed), the appliance kit will only show a single SAS path to the affected Logzilla in slot 23. In the event of a failure in the single operational path, the Logzilla will be offline/unreachable.

Example:

   7000 Appliance BUI Logzilla Status Example

     Maintenance >> Hardware >> Disk Shelves >> Component Details

                     Label HDD 23
                     FMRI hc:///ses-enclosure=0/bay=23/disk=0

               Manufacturer STEC
                      Model ZeusIOPs
                     Serial STM00010F746

                   Revision 9001
                  Interface SAS
                       Size 17G
                       Type Log
               Online paths 1

     7000 Appliance CLI Logzilla Status Example

     ar7320:> maintenance hardware select chassis-001 select disk
     select disk-023 list

     Properties:
                      label = HDD 23
                    present = true
                    faulted = false
               manufacturer = STEC
                      model = ZeusIOPs
                     serial = STM00010F746
                   revision = 9001
                       size = 17G
                       type = Log
                     device = c0t5000A7203001E337d0
                  pathcount = 1
                  interface = SAS
                     locate = false

Impact

When only a single path is enabled in a dual port SAS Logzilla device, a failure for any reason anywhere in fabric for the single functional path results in a loss of access to the Logzilla because the secondary access path is off line due to this problem.

Changes

Contributing Factors

The SSD must be located in slot 23 only of the JBOD Diskshelf, must have firmware prior to 9002 (i.e. 9001), OR firmware of 9002 or greater installed and the device not have been power cycled/reseated since the firmware upgrade.

Cause

Root Cause

A specific problem related to the highest number slot in the JBOD Diskshelf exists in the Logzilla 9001 firmware which can lead to a disabled port in the Logzilla SSD. When firmware is upgraded the disabled port may still exist because a secondary problem is that the device must be power cycled/reseated in order for the specific change to address the disabled port to take affect.

Solution

Workaround

There are two processes to the workaround.

1- Upgrade the firmware to 9002 or later (9002 was released in Q3.2.0 - aka 2010.08.17.2.0)
2- Power cycle the Logzilla device by reseating it after the firmware upgrade.

There are no workarounds absent from updating the firmware.

Resolution

Note: The following should only be performed by trained Oracle service personnel.

Please perform the following steps to alleviate this situation:

1) Identify the Slot 23 SSD in the Diskshelf JBOD.
2) Update the SSD to FW version 9002 or later if needed.
3) Remove the SSD from Diskshelf Slot 23 and wait 30 seconds.
4) Insert the SSD into Diskshelf Slot 23.
5) Wait for it to come back online (Green “Ready” LED will light)
6) Verify the Slot 23 SSD has two paths.

Example of successful upgrade:

7000 Appliance BUI Logzilla Status Example

Maintenance >> Hardware >> Disk Shelves >> Component Details

                   Label HDD 23
                   FMRI hc:///ses-enclosure=0/bay=23/disk=0

           Manufacturer STEC
                  Model ZeusIOPs
                 Serial STM00010F746

               Revision 9002
              Interface SAS
                   Size 17G
                   Type Log
           Online paths 2

   7000 Appliance CLI Logzilla Status Example

   ar7320:> maintenance hardware select chassis-001 select disk
   select disk-023 list

   Properties:
                  label = HDD 23
                present = true
                faulted = false
               serial = STM00010F746
             revision = 9002
                   size = 17G
                   type = Log
               device = c0t5000A7203001E337d0
              pathcount = 2
          interface = SAS
                 locate = false

Repeat these steps for all other Logzilla SSDs in Slot 23 running FW 9002 or later for all
of the JBODs that have this failing signature.

Identification of Affected Parts (how to):

Check the health of a system and ensure that all devices in a DiskShelf unit, including the SSDs, have dual paths.

Contacts:

@ Contributor: Andy.Laker@oracle.com
@ Responsible Engineer: Christopher.Burgess@oracle.com
@ Responsible Manager: Cheri.Williams@oracle.com
@ Business Unit Group: NWS (Network Storage)

For information about FAB documents, its release processes, implementation strategies and billing information, go to the following URL:

   https://sunspace.sfbay.sun.com/display/Onestop/FAB%20(Field%20Action%20Bulletin)

In addition to the above you may email:

   * FAB-Manager_US@Oracle.COM

Attachments

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