IBM RS/6000 manual Disk Service Aids, Diskette, Display/Alter, Optical

Display/Alter		Sector Service Aid
This	service aid		allows	the	user to	display	and	alter	information o
Care	must	be used when using this service aid						because	inappropria
some	disk	sectors	may	result	in total	loss of	all	data	on the disk

addressed		by their decimal sector number. Data is displayed both
ASCII.	To	prevent corrupted data	from	being	incorrectly corrected,
not display information that cannot			be	read	correctly.
Optical	Disk	Service Aids

The Optical Disk Service Aids consist of Initialize, Format and Cer Sector Availability service aids.

ŸInitialize

This service aid		is used to format the optical disk	without	ce
does	not reassign	the defective sectors; however, it	is a	qui
after	cleaning the	disk.

ŸFormat and Certify

This service aid is used to format the optical disk and certi process is drive specific and performs the surface analysis of spare sectors. The defective sectors are reassigned.

ŸSpare Sector Availability

This	service aid			checks	the number of spare sectors available
The	spare		sectors	are	used to reassign when defective sectors
during normal usage or during a						format and certify operation. Lo
spare		sectors indicates			that the disk needs to be backed up
matting		the	disk will not		improve	the availability of spare secto

Diskette	Media Service		Aid
This service aid provides a				way to verify the data	written on	a
service	aid	is	selected, a	menu asks you to select	the type	of
The program then reads all of				the ID and data fields on the di
total number		of	bad sectors	found.

Chapter 7. Using the Service7-13Aids