Data storage device reducing wake latency for magnetic tape
A data storage device is disclosed comprising at least one head configured to access a magnetic tape. The head is positioned at an idle location along a length of the magnetic tape when entering an idle mode, wherein the idle location reduces a wake latency associated with accessing the magnetic tape when exiting the idle mode.
1. A data storage device configured to access a magnetic tape, the data storage device comprising:
at least one head configured to access the magnetic tape; and
control circuitry configured to position the head at an idle location along a length of the magnetic tape when entering an idle mode, wherein:
the idle location is in a first area of high access frequency data recorded on the magnetic tape such that a second area of low access frequency data is outwardly of the first area relative to the idle location,
the high access frequency data is data having an access frequency that exceeds a threshold, and
the low access frequency data is data having an access frequency below the threshold.
2. The data storage device as recited in claim 1 , wherein the data storage device comprises the magnetic tape.
3. The data storage device as recited in claim 1 , wherein:
the magnetic tape is housed into a cartridge assembly; and
the data storage device comprises a tape drive assembly configured to receive the cartridge assembly.
4. The data storage device as recited in claim 1 , wherein the idle location is proximate a middle of the length of the magnetic tape.
5. The data storage device as recited in claim 1 , wherein the control circuitry is further configured to detect the high access frequency data.
6. The data storage device as recited in claim 1 , wherein the control circuitry is further configured to receive a configuration command from a host identifying the idle location.
7. The data storage device as recited in claim 1 , wherein the control circuitry is further configured to:
write high access frequency data proximate the idle location of the magnetic tape; and
write low access frequency data away from the idle location of the magnetic tape.
8. The data storage device as recited in claim 7 , wherein the control circuitry is further configured to write high access frequency data from the idle location of the magnetic tape toward an end of the magnetic tape.
9. The data storage device as recited in claim 7 , wherein the control circuitry is further configured to write low access frequency data proximate an end of the magnetic tape.
10. The data storage device as recited in claim 9 , wherein the control circuitry is further configured to write the low access frequency data toward the idle location.
11. A data storage device configured to access a magnetic tape, the data storage device comprising:
at least one head configured to access the magnetic tape; and
control circuitry configured to position the head at an idle location along a length of the magnetic tape when entering an idle mode, wherein:
the idle location reduces a wake latency associated with accessing the magnetic tape when exiting the idle mode,
the idle location is in a first area of high access frequency data recorded on the magnetic tape such that a second area of low access frequency data is outwardly of the first area relative to the idle location,
the high access frequency data is data having an access frequency that exceeds a threshold, and
the low access frequency data is data having an access frequency below the threshold.
12. The data storage device as recited in claim 11 , wherein the data storage device comprises the magnetic tape.
13. The data storage device as recited in claim 11 , wherein:
the magnetic tape is housed into a cartridge assembly; and
the data storage device comprises a tape drive assembly configured to receive the cartridge assembly.
14. The data storage device as recited in claim 11 , wherein the idle location is proximate a middle of the length of the magnetic tape.
15. The data storage device as recited in claim 11 , wherein the control circuitry is further configured to detect the high access frequency data.
16. The data storage device as recited in claim 11 , wherein the control circuitry is further configured to receive a configuration command from a host identifying the idle location.
17. The data storage device as recited in claim 11 , wherein the control circuitry is further configured to:
write high access frequency data proximate the idle location of the magnetic tape; and
write low access frequency data away from the idle location of the magnetic tape.
18. The data storage device as recited in claim 17 , wherein the control circuitry is further configured to write high access frequency data from the idle location of the magnetic tape toward an end of the magnetic tape.
19. The data storage device as recited in claim 17 , wherein the control circuitry is further configured to write low access frequency data proximate an end of the magnetic tape.
20. The data storage device as recited in claim 19 , wherein the control circuitry is further configured to write the low access frequency data toward the idle location.
21. A data storage device configured to access a magnetic tape, the data storage device comprising:
at least one head configured to access the magnetic tape; and
a means for positioning the head at an idle location along a length of the magnetic tape when entering an idle mode, wherein:
the idle location reduces a wake latency associated with accessing the magnetic tape when exiting the idle mode,
the idle location is in a first area of high access frequency data recorded on the magnetic tape such that a second area of low access frequency data is outwardly of the first area relative to the idle location,
the high access frequency data is data having an access frequency that exceeds a threshold, and
the low access frequency data is data having an access frequency below the threshold.
22. The data storage device as recited in claim 21 , wherein the idle location is proximate a middle of the length of the magnetic tape.