Hard disk capacity and raid array knowledge

1. Hard disk capacity knowledge

1DB=1024NB; 1NB=1024BB, 1BB=1024YB; 1YB=1024ZB; 1ZB=1024EB; 1EB=1024PB; 1PB=1024TB; 1TB=1024GB; 1GB=1024MB; 1MB=1024KB; 1KB=1024B

2. Raid array knowledge

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