(3)Operation if formatting is not completed normally

While the FORMAT UNIT command is not being executed after a change in data format related parameters by the MODE SELECT command, if the FORMAT UNIT command is terminated abnormally for any reason (example: power cut off or RESET condition), the data on the disk media cannot be accessed normally. In this case, the IDD reports a CHECK CONDITION status for the command accessing the disk media.

The sense data generated at this time indicate a MEDIUM ERROR [=3] / Medium format corrupted [=31-00] in the case of the former and MEDIUM ERROR [=3] / FORMAT command failed [=31-01]. In either case, the IDD is restored to the ready state by reinitializing the disk media using the FORMAT UNIT command.

1.7.5Error recovery processing

If an error is detected an recoverable error on the SCSI bus or internally in the IDD, the IDD attempts recovery processing of the detected error during command execution.

The INIT can specify detailed parameters related to error recovery processing and whether or not there is a report for errors which were successfully recovered by using the MODE SELECT or MODE SELECT EXTENDED command. It can also save those parameters in accordance with INIT specifications in the system space on the disk media, and can change them temporarily without saving them. After the power is switched on, or after a reset (RESET condition or TARGET RESET message), the saved parameters are read and the error recovery processing procedures is initialized.

See Section 3.1.5 “MODE SELECT” and Section 3.1.6 “MODE SELECT EXTENDED” for details of the MODE SELECT or MODE SELECT EXTENDED command. See Section 5.3 “Disk Drive Error Recovery Processing” and Chapter 3, “SCSI Bus Error Recovery Processing” of “SCSI Physical Interface Specifications” for details of error recovery processing.

An outline of error recovery processing executed by the IDD is shown below.

(1)Recovery processing for errors on SCSI bus

The IDD does not perform recovery processing for error detected on the SCSI bus. When error recovery is impossible, or when a critical error related to SCSI bus protocols is detected, the IDD may transfer the SCSI bus forcibly to the BUS FREE phase and clear the command that is currently being executed.

Table 1.4 Outline of SCSI Bus Error Recovery Processing

Item

Type of Error

Error Recovery Processing

1

MESSAGE OUT phase parity error

“CHECK CONDITION” Status

2

COMMAND phase parity error

“CHECK CONDITION” Status

3

DATA OUT phase parity error

“CHECK CONDITION” Status

4

Received INITIATOR DETECTED ERROR message.

“CHECK CONDITION” Status

5

Received MESSAGE PARITY ERROR message.

“CHECK CONDITION” Status

6

RESELECTION phase time-out

Re-execute RESELECTION phase.

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Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications Error recovery processing
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MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives represent a significant advancement in storage technology, catering to the needs of businesses seeking reliability, performance, and high capacity. These drives are designed for enterprise environments, providing exceptional data integrity and speed essential for effective data management.

The MAN3184 series is renowned for its high rotational speed of 10,000 RPM, which significantly enhances data access times. With a capacity of up to 18.4 GB, these drives are suitable for applications requiring quick read and write operations. The series employs an improved read/write head technology, which reduces latency and increases overall performance. This technology is complemented by advanced error correction mechanisms, ensuring the reliability necessary for critical data applications.

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