ocr: Management Function dets lt BOk04 Bi0001 Block07 Block0? su J Siockos Bicckos Bxkcs Block 08 ac XMA Blodkus Boc06 Bakc9 Blockog BDID BOK333 Biocs3 Eockt6 Blockisi etc etca etG elc etc. etc, FIGURE 2. Example of two-level NAD: data striped. across pairs ofmirrored disks.