Seagate ST39251LC Manual do Utilizador descarregar pdf (Página 42)

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This function can repair damage drives. Factory LLF can completely repair ECC bad tracks existing on drive

surface or logical error caused by running, even many maintenance departments always repair such kind of

patient drives using this function. SCSI drives with "0 LBA" fault can be fixed through LLF regardless of data

contained on drive.

In fact, there are still many skills for drive formatting, so we suggest you use Standard LLF or Format & Rebuild

GList to repair bad sectors only.

To perform factory LLF, you must order targeter to format storage media with LUN designated, in the easiest

mode, not sending any parameter, and the targeter will perform formatting using default format. Two steps are

provided in actual formatting process, first, physical media is formatted, representing header, data and ECC

information will be written to each sector. Next, physical block mapped to logical block. Finally, defect block will

be reassigned when scanning the storage media the second time. Corresponding functional order must be

chosen before using formatting command because command setting required for parameter formatting. Only in

this way, the drive setting can be consistent with your desired mode parameters to complete formatting.

In SCSI technical manual, formatting parameters list’s structure: 0~3 Byte contains the header, the following

4~8 Byte is optional initial mode descriptors with variable length.

The following are optional defect descriptors, so, a parameter list is necessary when sending an initial

mode or defect list via commands.

The parameter list header which is in 2~3 Byte contains defect list length except control bit in 1 Byte.

The length may be zero, and the defect number can be concluded from list length and command itself

in 1 Byte. The following is detailed description for control bit in 1 Byte.

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Seagate ST39251LC Manual do Utilizador Página 42