WARNING: 'Failed To Read Mirror Side 1' continuously reported in the alert log (Doc ID 1289905.1)

Last updated on APRIL 26, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.2.0 [Release 11.2]
Information in this document applies to any platform.
***Checked for relevance on 10-Oct-2014***

Symptoms

Error continuously reported in the alert log:

WARNING: failed to read mirror side 1 of virtual extent 665 logical extent 0 of file 280 in group [1.445758315] from disk ASM_ESBQA001_DATA1_0005 allocation unit 75811 reason error; if possible,will try another mirror side 

Function List (to Full stack) (to Summary stack)

ksedsts <- ksdxfstk <- ksdxcb <- sspuser <- f0<- sdbgrfucf_close_file <- sdbgrfcf_close_file <-dbgrlWriteTextOnly<- dbgrlWriteAlertDetail_int <- dbgrlWriteAlertDetail<- dbgrlWriteAlertText <- dbkrlWriteAlertText <- dbkrlPril <- ksdfmw<- ksdwrt<- kfioCompleteIO <- kfioWaitIO <- kfioRequestPriv <-kfioRequest<- ksfd_kfioRequest<- ksfd_osmio <- ksfd_io <- ksfdread <- kcfrbd1 <- kcbzib<- kcbgcur <-kturRollbackToSavepoint <- ktcrsp1 <- ksures <-ksuxds<- kssdel <- kssdch <- ksudlp <- opidcl <- opidrv <- sou2o <- opimai_real <- ssthrdmain <- main

Changes

After upgrade to 11.2.0.1.

You have already applied the patch for <bug:10051315> and <bug:10055063>.

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms