Device drive is busy at 100%

11.2.0.4

backup site DataGuard

1 database, using ASM

Started having random 'disk peripheral sd * is busy 100% ' on my site of dataguard.    The discs may be data or FRA diskgroup.   in case of caveat, it clears itself shortly after.   Nothing in the log of alerts from each RDBMS other than the application of the last log that is not at the same time warnings occur.

Im confused it, FRA My example has 6 x 512 GB disks.  Only pays 100% busy.  Even when it happens with one of the disks is on my data diskgroup, multiple disks, my understanding of the balancing of the ASM, but that this should not happen and certainly not on a backup site.  any input appreciated.

OEL

Nothing in the ASM alerts log

Nothing in the messages

the status is online and fine.

If I check the history of the disc in EM, (% of the company, not of used capacity) I can see it continue to rise for a few hours before.  This would be the reference to balancing is not not correct (I emphasize hint) but after the warning, the business falls to zero percent.

Here's a question, I store data in a table T1, T1 is in tablespace with sitting datafiles on + DATADG.     If I inserts a row into the table T1, is a drive used for insertion and then swung or ASM written to all disks at the same time for the insert

Tags: Database

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