Systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format are described. Embodiments include systems and methods for protecting data stored on a data storage medium so that the data may be recovered without errors.

A set of consecutive user data wedges are each located between consecutive servo wedges of a heat-assisted recording medium. Test data is written at least every other one of the consecutive data wedges using different laser power values. Based on reading the test data, a nominal laser power is selected for use by the read/write head.

The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.

The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.

The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.

A diagnostic tape (318) for use with a tape drive (310) having a tape head (322) includes a first tape section (430A) and a second tape section (430B). The first tape section (430A) and the second tape section (430B) are configured to move across the tape head (322) during use of the tape drive (310). The first tape section (430A) includes a first patterned data code (432A) that is indicative of a first spacing between the tape head (322) and the first tape section (430A). The second tape section (430B) includes a second patterned data code (432B) that is indicative of a second spacing between the tape head (322) and the second tape section (430B). The second patterned data code (432B) is different than the first patterned data code (432A). The diagnostic tape (318) can further include a tape head cleaning section (630F) including abrasive material (650) that is configured to move across the tape head (322) to clean the tape head (322).

A diagnostic tape (318) for use with a tape drive (310) having a tape head (322) includes a first tape section (430A) and a second tape section (430B). The first tape section (430A) and the second tape section (430B) are configured to move across the tape head (322) during use of the tape drive (310). The first tape section (430A) includes a first patterned data code (432A) that is indicative of a first spacing between the tape head (322) and the first tape section (430A). The second tape section (430B) includes a second patterned data code (432B) that is indicative of a second spacing between the tape head (322) and the second tape section (430B). The second patterned data code (432B) is different than the first patterned data code (432A). The diagnostic tape (318) can further include a tape head cleaning section (630F) including abrasive material (650) that is configured to move across the tape head (322) to clean the tape head (322).