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Category: recovery

Compute node disk expansion resulted in mount.ocfs2: Bad magic number in superblock while opening device /dev/sda3

Compute node disk expansion resulted in mount.ocfs2: Bad magic number in superblock while opening device /dev/sda3

Before Christmas 2017 I had the honour to expand the compute node storage for a virtualised exadata. Better said, OVM on exadata. This can be done for several reasons. The most logic one, also the reason why this customer bought the disk expansion, is that you want to create more virtual machines and you have ran out of space on /EXAVMIMAGES. The preparation is actually pretty simple. It is documented completely in the Exadata Database Machine Maintenance Guide. And look,…

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Back to basics: controlfile autobackup and recovery

Back to basics: controlfile autobackup and recovery

Sometimes it’s not bad to look back to the basics. Due to circumstances I’m focusing more on backups nowadays. This time I wanted to have a closer look to controlfile autobackups. Oh by the way, for the one who follow me on twitter, yes, it’s this post which is related to this picture 🙂 Most of the tests I do, I do them at night (not this one, because I needed it for my customer) and yes, I write most…

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oops, sorry I dropped the wrong directory

oops, sorry I dropped the wrong directory

There are some days, that you play around in your lab and end up with a situation you hope will never happen in real life. Today was one of those days. While playing around with 12.2 pdb’s I found following scenario. Imagine a container database in noarchivelog. I would not recommend to run in noarchivelog, but sometimes, it still happens. At a certain moment in time, you play around with the db_create_file_dest parameter and you decide to set it to /u03…

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