Control apparatus, storage apparatus, and computer product
View Patent ↗A rewrite determining unit of a hard disk apparatus acquires a servo signal that includes an offtrack amount corresponding to each servo frame from a position information memory, and determines whether a write fault has occurred based on the servo signal. If a write fault has occurred, the rewrite determining unit determines a rewrite sector count, and a write controller controls a hard disk controller so that rewriting is performed to correspond to the rewrite sector count determined by the rewrite determining unit.
1. A control apparatus that controls a storage apparatus to rewrite data when a write fault occurs while the data is being written to a storage medium included in the storage apparatus, the control apparatus comprising:
a fault-cause determining unit that determines a cause of the write fault; and
a sector-count determining unit that determines number of sectors in which the data is to be rewritten according to the cause,
wherein the sector-count determining unit determines the number of sectors based on:
shock data output from a shock sensor of the storage apparatus when the storage apparatus receives a shock, and
amplifier information indicating whether a malfunction has occurred in a head amplifier that is included in the storage apparatus and that processes a write signal used by the head for writing the data.
2. The control apparatus according to claim 1 , wherein the fault-cause determining unit determines the cause based on at least one of: an offtrack amount indicating an amount of shift of a head of the storage apparatus from a center of a track on the storage medium,
a shock detected by the shock sensor of the storage apparatus, and
circuit information pertaining to a circuit malfunction of the storage apparatus.
3. The control apparatus according to claim 2 , further comprising an offtrack-amount detecting unit that detects the offtrack amount for every servo frame using a plurality of servo frames recorded on the storage medium.
4. A storage apparatus that rewrites data when a write fault occurs while the data is being written to a storage medium included in the storage apparatus, the storage apparatus comprising:
a fault-cause determining unit that determines a cause of the write fault; and
a sector-count determining unit that determines number of sectors in which the data is to be rewritten according to the cause,
wherein the sector-count determining unit determines the number of sectors based on:
shock data output from a shock sensor of the storage apparatus when the storage apparatus receives a shock, and
amplifier information indicating whether a malfunction has occurred in a head amplifier that is included in the storage apparatus and that processes a write signal used by the head for writing the data.
5. The storage apparatus according to claim 4 , wherein the fault-cause determining unit determines the cause based on at least one of:
an offtrack amount indicating an amount of shift of a head of the storage apparatus from a center of a track on the storage medium,
a shock detected by the shock sensor of the storage apparatus, and circuit information pertaining to a circuit malfunction of the storage apparatus.
6. The storage apparatus according to claim 5 , further comprising an offtrack-amount detecting unit that detects the offtrack amount for every servo frame using a plurality of servo frames recorded on the storage medium.
7. A computer-readable recording medium that stores therein a computer program that causes a computer to rewrite data when a write fault occurs while the data is being written to a storage medium included in a storage apparatus, the computer program causes the computer to execute:
determining a cause of the write fault; and
determining number of sectors in which the data is to be rewritten according to the cause,
wherein the determining includes determining the number of sectors based on:
shock data output from a shock sensor of the storage apparatus when the storage apparatus receives a shock, and
amplifier information indicating whether a malfunction has occurred in a head amplifier that is included in the storage apparatus and that processes a write signal used by the head for writing the data.
8. The computer-readable recording medium according to claim 7 , wherein the determining includes determining the cause based on at least one of:
an offtrack amount indicating an amount of shift of a head of the storage apparatus from a center of a track on the storage medium,
a shock detected by the shock sensor of the storage apparatus, and
circuit information pertaining to a circuit malfunction of the storage apparatus.
9. The computer-readable recording medium according to claim 8 , further causing the computer to execute detecting the offtrack amount for every servo frame using a plurality of servo frames recorded on the storage medium.