Sector sliding in shingled magnetic recording hard disk drive

A method of controlling a shingled magnetic recording (SMR) hard disk drive, the method comprising:

• attempting a sequential write to a first sector of a sequence of sectors of a recording disk;
• responsive to encountering a write inhibit boundary corresponding to the first sector, continuing the sequential write in a same disk revolution to the next available sector in the sequence of sectors for the sequential write;
• and
• responsive to encountering the end of a sector at the end of a first track, writing a track error correction parity sector at the end of the first track and continuing the sequential write to the next sector in the sequence of sectors at an adjacent second track.

A controller circuitry storing or accessing one or more sequences of instructions which, when executed by one or more processors, individually or in combination, cause performance of:

• attempting a sequential write to a first sector of a sequence of sectors of a recording disk, wherein the sequence of sectors is being written to in an SMR zone of the recording disk;
• responsive to encountering a write inhibit boundary corresponding to the first sector, continuing the sequential write in a same disk revolution to the next available sector in the sequence of sectors for the sequential write;
• and
• adjusting the write inhibit boundary based on one or more of:
• remaining capacity in the SMR zone;
• storage capacity outside of the SMR zone for writing sectors that cannot be written in the SMR zone due to the write inhibit boundary;
• and
• operational vibration trends observed when writing in the SMR zone.

A controller circuitry storing or accessing one or more sequences of instructions which, when executed by one or more processors, individually or in combination, cause performance of:

• attempting a sequential write to a sector, of a first track at a first position corresponding to a nominal track width, of a sequence of sectors of a shingled magnetic recording disk;
• determining, based on the positional accuracy of at least a portion of the first track writing, a second track position corresponding to an adjacent second track of the recording disk and not corresponding to the nominal track width, wherein the recording disk comprises a plurality of zones with each zone pre-sized to a same zone memory size based on the nominal track width based on an expected mean track width across an entire zone of the recording disk;
• and
• responsive to encountering a write inhibit boundary corresponding to the sector,
• determining whether to continue the sequential write to the next available sector in the sequence of sectors for the sequential write or to write to the second track according to the determined second track position, and
• based on the determining, (i) continuing the sequential write in a same disk revolution to the next available sector in the sequence of sectors for the sequential write, wherein responsive to encountering the end of a sector at the end of the first track, writing a track error correction parity sector at the end of the first track and continuing the sequential write to the next sector in the sequence of sectors at an adjacent second track, or (ii) writing to the second track according to the determined second track position.

A shingled magnetic recording (SMR) data storage device comprising an electronic controller comprising one or more sequences of instructions which, when executed by one or more processors, individually or in combination, cause performance of:

• attempting a sequential write to a first sector of a sequence of sectors of a recording disk;
• responsive to encountering a write inhibit boundary corresponding to the first sector, continuing the sequential write in a same disk revolution to the next available sector in the sequence of sectors for the sequential write;
• and
• responsive to encountering the end of a first track, writing a track error correction parity sector at the end of the first track and continuing the sequential write to the next sector in the sequence of sectors at an adjacent second track.

A shingled magnetic recording (SMR) data storage device comprising an electronic controller comprising one or more sequences of instructions which, when executed by one or more processors, individually or in combination, cause performance of:

• attempting a sequential write to a first sector of a sequence of sectors of a recording disk, wherein the sequence of sectors is being written to in an SMR zone of the recording disk;
• responsive to encountering a write inhibit boundary corresponding to the first sector, continuing the sequential write in a same disk revolution to the next available sector in the sequence of sectors for the sequential write;
• and
• adjusting the write inhibit boundary based on one or more of:
• remaining capacity in the SMR zone;
• storage capacity outside of the SMR zone for writing sectors that cannot be written in the SMR zone due to the write inhibit boundary;
• and
• operational vibration trends observed when writing in the SMR zone.