Editor’s note: This is the second installment of a weekly series examining the effects e-discovery has had on the practice of law.

One gigabyte of electronic information is about equal to 9,000 e-mails with 3,000 attachments or 75,000 printed pages. A fast-moving associate can review about 200 pages an hour. Now comes a case with an exabyte of data, or 1 billion gigabytes.