6.3 Defect Processing
C141-E218 6-9

6.2.2 Power commands

The following commands are available as power commands.
• IDLE
• IDLE IMMEDIATE
• STANDBY
• STANDBY IMMEDIATE
• SLEEP
• CHECK POWER MODE
• SET FEATURES (APM setting)
6.3 Defect Processing
This device performs alternating processing where the defective sector is
alternated with the spare area depending on media defect location information.
The media defect location information is registered in the system space specified
for the user area according to the format at shipment of the media from the plant.

6.3.1 Spare area

The following type of area is prepared as the spare area in user areas:
1) Spare cylinder for alternate assignment: This cylinder is used during
automatic alternating processing for defective sector. More than 2000
sectors/drive.