Incoming Inspection - Seagate ST251N Product Manual

an internal controller error and an additional power-on diagnostic
code in sense byte one. The drive is ready to read/write if no error
codes are received within 20 seconds. The failure codes and the test
sequence follow:
Microprocessor/Internal Memory Test: Failure is indicated by one
flash and an additional sense code (byte one) of 31H.
Microprocessor ROM Checksum Test: Failure is indicated by two
flashes and an additional sense code of 32H.
Controller Chip Test: Failure to initialize correctly is indicated by three
flashes and an additional sense code of 33H.
Controller Program RAM Test: Failure is indicated by four flashes an
an additional sense code of 34H.
Data Buffer RAM Test: Failure is indicated by five flashes and an ad-
ditional sense code of 35H.
Spindle Speed Test: If the drive is unable to reach and maintain correct
spindle speed, six flashes will be returned with an additional sense
code of 36H.
Read Record ID Mark: If the controller is unable to find and read an
ID mark for any record, seven flashes are returned with an additional
sense code of 37 H·
Read Operating System Microcode From Drive: If the controller is un-
able to read the operating system from the drive, eight flashes are
returned with an additional sense code of 38H. If the controller reads
the operating system records, but determines that they are invalid,
nine flashes are returned with an additional sense code of 39H.
2. 7 INCOMING INSPECTION
The ST251 N/277N support a self-test routine that Seagate recommends
for incoming inspection. This test may be run after the unit has
sucessfully passed the power-on diagnostics.
ST251Nl277N Product Manual, Rev. B
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