Fujitsu MBC2073RC Background Media Scan BMS, Write command operation during a Pre-Scan, ∙ Per

7.4 Background Media Scan (BMS)

If a scan ends with an error, the next Pre-Scan operation will begin with LBA 0. If the Write command is issued to an LBA that was not scanned, this LBA will be verified after data is written to it. (For further information, see the next section.)

7.4.2.3 Write command operation during a Pre-Scan

If the Write command is issued to an LBA that has yet to be scanned, the Write command will function as a Write&Verify command during the Pre-Scan period. The operation is generally the same as when the typical Write&Verify command is issued. However, the sense information is as follows:

Write	Verify	Error code
Good	Good	−
	Successful rewrite	−
	Successful alternate processing	01-0C-81
	Alternate processing error	03-0C-03
	Too many retries	03-0C-03
Error	−	Write error code

∙PER

Entirely based on the Mode Page 1 PER configuration.

7.4.2.4 Conditions for operation

The conditions that suppress scanning include the following:

∙Not Ready status

During a scan, automatic alternate processing is performed based on the ARRE specification. If the power is switched off during a scan and then switched back on, a scan will begin with the LBA in operation when the power was switched off (within a 1% error). It will actually begin after a 500-ms idle time. When a scan ends, Log Save is performed.

The conditions that stop scanning include the following:

∙A hardware error is detected.

∙Status expected to lead to failure is detected.

∙Formatting is performed without a P-List.

∙Format Corrupted is encountered.

∙The temperature drops below 10°C or exceeds 60°C.

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