Re: How to simulate Block Corruption?

• Sandeep Kurliye <Sandeep_at_almoayyedintl.com.bh>

>
> Hello Gurus,
>
> I am in the process of testing recovery options from block corruptions.
> So, my setup requires a db which is having block corruption problem.
>
> How to simulate block corruption in db?

dd if=/vmunix of=$yourdbf bs=8k count=5;

you now have 40KBytes of corruption. If your dd has offset capability then use it to simulate corruption at various points in the file.

to simulate corruption in expanding the file use:

dd if=/dev/urandom bs=8k count=$howevermany >> $yourdbf;

--
Steven Lembark                               2930 W. Palmer
Workhorse Computing                       Chicago, IL 60647
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