Volume II: Troubleshooting - Disk

Fujitsu M2361

Table 1 describes the drive state information indicated by two 7-segment LEDs, depending on the position of the toggle State Switch. The Write/Read Check State, Access State, and DE Sequence State are described on the following pages.

The Write/Read Check State indicates fault status during a Write or Read operation. When a fault status occurs in the drive, the Fault signal in the Unit Status is issued as a summary to the controller. The controller issues a Fault Clear Signal to clear the Write/Read Check State.

The Access State indicates the access status of the head in Seek and RTZ operation and the Start/Stop sequence of the spindle motor.