Power backed-up dual memory system
Portable, non-volatile read/write memory module
Memory data holding circuit
Computer power system
Apparatus for connecting electronic modules containing integrated circuits and backup batteries
Memory card circuit
Write protection circuit for use with an electrically alterable non-volatile memory card
Address transition detection to write state machine interface circuit for flash memory
Flash memory circuit and method of operation
ApplicationNo. 591366 filed on 01/25/1996
US Classes:714/6, Redundant stored data accessed (e.g., duplicated data, error correction coded data, or other parity-type data)714/42Memory or storage device component fault
ExaminersPrimary: Canney, Vincent P.
Attorney, Agent or Firm
International ClassG06F 013/00
AbstractA transfer memory backup system for a RAID level 5 disk array storage system which includes a transfer buffer, wherein write data received by the array is written into a transfer buffer, and a write complete status signal generated, prior to the write data being written to the disk drives within the array. The transfer memory backup system includes a low power, industry standard PCMCIA (Personal Computer Memory Card International Association) device along with a small, temporary voltage source made up of a small rechargeable battery or a high capacitance gold capacitor. Upon the detection of a disk array storage system failure, low power logic provides continuous refresh for the transfer buffer as well as power to the components included in the transfer memory backup system upon a disk array storage system failure. A low power CMOS microprocessor with self contained microcode (mask programmable ROM) controls the transfer of data from the transfer buffer to removable storage medium within the PCMCIA device.