User manual MAXTOR D540X-4D 03-5-2002

[. . . ] # 0 2 JETC / NCWPC/ VEWFQT2 & :& TQVZC/ © March 5, 2002 Maxtor Corporation. Printed in U. S. A. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein ­ which will be incorporated in revised editions of the publication. Maxtor may make changes or improvements in the product(s) described in this publication at any time and without notice. [. . . ] Maxtor ships a replacement drive within 2 business days 3. Customer returns the original drive and credit card draft is destroyed. For the current up-to-date information, hours of operation, phone numbers and worldwide email accounts, on how to contact Maxtor Technical support and Product Support please go to Maxtor's web site at www. maxtor. com and click on the `Contact' link at the top of the page. 6412275 &0# '%+84'5 TGVRCJ% GEKXTG5 TGOQVUW%GEPCVUKUU# NCEKPJEG6 âGEKXTG5 VTQRRW5 VEWFQT2 [EKNQ2 GEKXTG5 GNDDKW3 Q0 Maxtor D540X-4D 6-1 Service and Support 6-2 Maxtor D540X-4D A ACCESS ­ (v) Read, write, or update information on some storage medium, such as a disk. ACCESS TIME ­ The interval between the time a request for data is made by the system and the time the data is available from the drive. Access time includes the actual seek time, rotational latency, and command processing overhead time. See also seek, rotational latency, and overhead. ACTUATOR ­ Also known as the positioner. The internal mechanism that moves the read/write head to the proper track. The Maxtor actuator consists of a rotary voice coil and the head mounting arms. One end of each head mounting arm attaches to the rotor with the read/write heads attached at the opposite end of each arm. As current is applied to the rotor, it rotates, positioning the heads over the desired cylinder on the media. AIRLOCK ­ A patented Maxtor feature that ensures durable and reliable data storage. Upon removal of power from the drive for any reason, the read/write heads automatically park and lock in a non data area called the landing zone. AIRLOCK allows the drive to withstand high levels of non-operating shock. When power is applied to the drive, airflow created from the spinning disks causes the AIRLOCK arm to swing back and unlock the actuator, allowing the heads to move from the landing zone. Upon power down, the AIRLOCK swings back to the locked position, locking the heads in the landing zone. A park utility is not required to park the heads on drives equipped with AIRLOCK (all Maxtor drives). ALLOCATION ­ The process of assigning particular areas of the disk to particular files. See also allocation unit. ALLOCATION UNIT ­ An allocation unit, also known as a cluster, is a group of sectors on the disk that can be reserved for the use of a particular file. AVERAGE SEEK TIME ­ The average time it takes for the read/write head to move to a specific location. To compute the average seek time, you divide the time it takes to complete a large number of random seeks all over the disk by the number of seeks performed. BACKUP ­ A copy of a file, directory, or volume on a separate storage device from the original, for the purpose of retrieval in case the original is accidentally erased, damaged, or destroyed. BAD BLOCK ­ A block (usually the size of a sector) that cannot reliably hold data because of a media flaw or damaged format markings. BAD TRACK TABLE ­ A label affixed to the casing of a hard disk drive that tells which tracks are flawed and cannot hold data. The listing is typed into the low-level formatting program when the drive is being installed. [. . . ] The number of tracks or cylinders that are written in each inch of travel across the surface of a disk. TRACK ­ One of the many concentric magnetic circle patterns written on a disk surface as a guide to where to store and read the data. TRACK DENSITY ­ How closely the tracks are packed on a disk surface. The number is specified as tracks per inch (TPI). [. . . ]