Installation manual

Media Defect Management
Embedded SCSI Disk Drives
The FORMAT UNIT command formats the media so that all data blocks can be accessed. The
following lists are used during the defect management process.
Primary, or Manufacturer's, Defect List (P list)
The P list supplied by the manufacturer is resident on the disk drive. The initiator can reference this
list with the READ DEFECT DATA command. The initiator cannot change or erase the Primary list.
Certification Defect List (C list)
The C list is the position information of defective data blocks detected during data block verification
after initialization when the FORMAT UNIT command is issued. These defects are added to the
Grown list.
Data Defect List (D list)
The D list is the defect position information transferred from the initiator upon execution of the
FORMAT UNIT command. These defects are added to the Grown list.
Grown Defect List (G list)
The G list includes defects identified to, or by, the drive. It does not include the P list. These defects
are classified as flaws appearing after the media is formatted. The initiator may request that the
current G list be used during formatting, or that the current G list be erased and a new list begun.
Entries to the G list include:
Defects provided to the drive in D lists during previous FORMAT UNIT commands.1.
Drive C list defects detected during previous FORMAT UNIT commands.2.
Defects appended by successful completion of the REASSIGN BLOCKS command.3.
Last updated: December 2, 1996
Comments and Suggestions
Sun4/II: Trouble - Disk - Media Defect Management
http://lios.apana.org.au/~cdewick/sunshack/data/feh/1.4/wcd00007/wcd0071a.htm [25.04.2002 16:01:33]