IBM SY44-5902-05 manual Appendix A. OS/400

This option reads the contents of a diskette while ignoring diskette sectors with read data CRC errors. For more information, see “Read data from diskette” on page 286.

vWrite data to diskette

This option writes the volume table of contents (VTOC) and data sectors to a new diskette. For more information, see “Write data to diskette” on page 286.

vDisplay diskette data

This option allows you to display the data in any sector on a diskette. For more information, see “Display diskette data” on page 286.

vPrint reports

This option allows you to print the following reports from the diskette:

–Volume label

–Data set label

–Load or dump object descriptor

–Failing sector

–Sector range

For more information, see “Print reports” on page 287.

Processing restrictions: The Work with diskette data recovery option:

vCannot duplicate diskettes containing data sets that have data set directories in the data area.

Deleted sectors are accepted by the read option and are identified by the print operation. The write operation compresses the data set in which the deleted sectors are found. Compression must occur before the write operation occurs; there is no machine interface (MI) to write a deleted sector. The automatic compression saves all data sets by starting with extent sector addresses. When suitable, the option adjusts end-of-extent and end-of-data addresses.

Diskettes containing data sets that have data set directories in the data area cannot be duplicated because the automatic compression could destroy the sector addressability of the data set directory. Any change made to the VTOC area should not change the sector size as determined by the read operation; compression logic assumes the same sector size.

vMight not read VTOC or data set identification sectors into a space object.

This option accepts I/O media errors that are associated with the sectors read during a read VTOC command. Because the IOP does not always return sectors read in error, the VTOC or data set identification sectors might not be read into the system space object. You can assemble valid sectors in place of those sectors that are not read back into the space object because of sector errors. The write operation checks identification sectors for the volume and first data set to verify if they are present or absent.

Alter diskette data: The display in Figure 82 on page 286 appears when you select the Alter diskette data option on the Work with Diskette Data Recovery display.

Appendix A. OS/400 285