Specifications

16 Hawk 2XL Product Manual, Rev. B
5.1.4 Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. There shall be no
more than one recoverable seek error in 10
7
physical seek operations. After detecting an initial seek error, the
drive automatically reseeks to the addressed track up to 3 times. If a reseek is successful, the Extended Sense
reports a seek positioning error (15h), no seek complete error (02h), or track follow error (09h), and the sense
key reports a recovered error (1h). If all three reseeks fail, a seek positioning error (15h) is reported with a
Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error.
Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to Section 5.1.1.2 of SCSI-2
Interface Product Manual P/N 77738479 for Request Sense information.
5.2 Reliability and service
5.2.1 Mean time between failure
The production disc drive shall achieve an MTBF of 800,000 hours when operated in a benign atmosphere at
an average disc drive ambient temperature of 95°F (35°C) or less as measured per this Product Manual, Sec-
tion 6.4.1. Short-term excursions up to the specification limits of the operating environment will not affect MTBF
performance.
The following expression defines MTBF
Estimated power-on operating hours in the period
MTBF per measurement period =
Number of drive failures in the period
Estimated power-on operation hours means power-up hours per disc drive times the total number of disc
drives in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be cal-
culated on a rolling average base for a minimum period of six months.
Drive failure means any stoppage or substandard performance caused by drive malfunction.
5.2.2 Preventive maintenance
No routine scheduled preventive maintenance shall be required.
5.2.3 Service life
The drive shall have a useful service life of five years. Depot repair or replacement of major parts is permitted
during the lifetime (see Section 5.2.4).
5.2.4 Service philosophy
Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must
be performed only at a properly equipped and staffed service and repair facility. Troubleshooting and repair of
PCBs in the field is not recommended, because of the extensive diagnostic equipment required for effective
servicing. Also, there are no spare parts available for this drive. Drive warranty is voided if the HDA is opened.
5.2.5 Service tools
No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.4.
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not
practical since there are no user purchasable parts in the drive.
5.2.6 Product warranty
Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants that
each product (including components and subassemblies) or spare part that fails to function properly under nor-
mal use due to defect in materials on workmanship or due to nonconformance to the applicable specifications
will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at cus-
tomer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure. Seagate
will pay for transporting the repair or replacement item to customer. For more detailed warranty information
refer to the Standard terms and conditions of Purchase for Seagate products.
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