FS System: FS1-2 Reports the Alert "Volume has lost data"

Asset ID:	1-72-2109826.1
Update Date:	2018-04-15
Keywords:

Solution Type Problem Resolution Sure

Solution 2109826.1 : FS System: FS1-2 Reports the Alert "Volume has lost data"

Applies to:

Oracle FS1-2 Flash Storage System - Version All Versions and later
Information in this document applies to any platform.

Symptoms

This document provides the steps to turn one or more LUNs online when an event for "Volume has lost data" occurs in Oracle FS1-2 Flash Storage System. The event can be seen in the FS System Manager GUI under System > Alerts and Events > System Alerts.

Changes

Cause

The primary reason for this event is the occurrence of multiple hardware failures, multiple software failures, or an unexpected power outage. Most often this issue arises due to the failure of flash-backed memory of the Controller to commit in-flight data due to multiple controller issues or loss of power on both controllers.

Solution

When the Lost Data flag is set on one or more volumes, the FS System cannot guarantee the integrity of data nor loss of data. The system places the affected volumes in offline status and generates the system alert for each volume. Each volume that is affected remains offline until the Lost Data flag is cleared. The purpose of the alert is to have the administrator to acknowledge the fact that the volume(s) might have some data corruption and should be checked after bringing the LUNs online.

To recover the LUNs from this issue the flag must be cleared.

Method Using FS System Manager GUI

The procedure to turn the affected LUNs online is given below:

Under System tab in GUI, select System Alerts
Right hand pane of the GUI should now report a Volumes has lost data alert
Right click on the alert and select Manage
Select the check box Clear lost data and click Ok

This should bring the LUN(s) online.

NOTE: You won't be able to clear the Volumes Lost Data flag if there is a SlatIntegrityChecker task running in the background. You must wait for that task to clear (it cannot be canceled) first.

Method Using fscli

Alternately, this action can be performed using fscli utility.

The fscli utility is needed to execute the required commands to clear the flag. Refer to <Document 1991938.1> FS System: How to Obtain and Install the fscli Tool Software.

To execute the command, login with any of the below roles:

Primary administrator
Administrator 1
Administrator 2

The procedure to clear lost data flag using fscli utility is given below:

1. Login to the Oracle FS System with the fscli command:

# fscli login -u <username> <fs-system IP>

2. Clear the Lost Data flag for all LUNs:

# fscli system -clearLostData

References

<NOTE:1991938.1> - FS System: How to Obtain and Install the fscli Tool Software
<NOTE:1605302.1> - Pillar Axiom: How to recover offline LUNs after a power failure

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