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Disk cache device and method for secure writing of hard disks in mass memory subsystems

  • US 6,480,933 B1
  • Filed: 07/06/2000
  • Issued: 11/12/2002
  • Est. Priority Date: 11/06/1998
  • Status: Expired due to Term
First Claim
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1. Disk cache device for secure writing comprising a host system (3) an adapter (30) for linking the host system to a bus (2), an interface (12) and at least one hard disk drive (1), a backup power source (62) for supplying backup power for a given duration, and at least one power supply main device (60, 61) for supplying electric power to the disk drive, a monitor (50) for monitoring at least the backup power supply source (62) and the main power supply devices (60, 61), the host system including an interrogator (31), the monitor (50) being connected to the interface (2) and adapted to be interrogated by the interrogator (31) of the host system (3) so that the host system can enable a write disk cache function, or not, in write commands to be sent to the disk drive or drives (1a, 1b, 1c), in accordance with the information gathered by the monitor (50).

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