This example assumes that the capacity of the FMD is 1,600 GB, the RAID configuration is 3D+1P, and the LDEV capacity is 880 GB.
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Calculate the number of times to overwrite the data:
[(1,600 x 3) x 2] / 880 = 10.9 = 11 times
Round up the value (10.9) to the nearest whole number. You need to overwrite the data 11 times.
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Define the shredding settings.
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Erase the volume data.
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Repeat steps 2 and 3, three more times, clicking
Add three times.