Browse Prior Art Database

Low Cost EIDE Data Preservation and Hot Plug Apparatus

IP.com Disclosure Number: IPCOM000015931D
Original Publication Date: 2002-May-17
Included in the Prior Art Database: 2003-Jun-21
Document File: 3 page(s) / 54K

Publishing Venue

IBM

Abstract

Disclosed is a low cost data backup device (LCBD), for the Extended Integrated Drive Electronics (EIDE) data preservation, this device is also Hot Plug capable. The LCBD consists of a PCI adapter and cables. The LCBD is used to control EIDE signals and power to devices attached to an EIDE interface as follows: The EIDE interface allows for two devices (master and slave) per port supporting up to two ports per EIDE interface. A system can be setup with up to four drives per EIDE interface. The EIDE interface allows for two devices (master and slave) per port supporting up to two ports per EIDE interface. A system can be setup with up to four drives per EIDE interface. The LCBD will require a spare drive for every drive for which the data is to be preserved so the user is not required to have a spare drive for each in the system but only for those which are to be preserved in case of drive failure. The LCDB uses a PCI adapter as a backup controller, which will control power and EIDE signals to the attached disks needing backup protection. At any given time all the backup disks are powered off (no power applied) they are only powered up when backing up and/or during an emergency situation when the primary drive has failed. When backing up a master disk, the primary slave disk is placed off line by the LCDB and the backup master disk is brought on line as a slave disk, the backup is performed and the drives are returned to the initial state. When backing up a slave disk the master disk is placed off line by the LCDB and the backup slave disk is brought on line as master disk, the backup is performed and the drives are returned to the initial state. The LCDB EIDE connections to the spare drives are an extension of the primary drives, placed in the same EIDE interface cable see figure 1.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 3

Low Cost EIDE Data Preservation and Hot Plug Apparatus

  Disclosed is a low cost data backup device (LCBD), for the Extended Integrated Drive Electronics (EIDE) data preservation, this device is also Hot Plug capable. The LCBD consists of a PCI adapter and cables. The LCBD is used to control EIDE signals and power to devices attached to an EIDE interface as follows: The EIDE interface allows for two devices (master and slave) per port supporting up to two ports per EIDE interface. A system can be setup with up to four drives per EIDE interface. The EIDE interface allows for two devices (master and slave) per port supporting up to two ports per EIDE interface. A system can be setup with up to four drives per EIDE interface. The LCBD will require a spare drive for every drive for which the data is to be preserved so the user is not required to have a spare drive for each in the system but only for those which are to be preserved in case of drive failure. The LCDB uses a PCI adapter as a backup controller, which will control power and EIDE signals to the attached disks needing backup protection. At any given time all the backup disks are powered off (no power applied) they are only powered up when backing up and/or during an emergency situation when the primary drive has failed. When backing up a master disk, the primary slave disk is placed off line by the LCDB and the backup master disk is brought on line as a slave disk, the backup is performed and the drives are returned to the initial state. When backing up a slave disk the master disk is placed off line by the LCDB and the backup slave disk is brought on line as master disk, the backup is performed and the drives are returned to the initial state. The LCDB EIDE connections to the spare drives are an extension of the primary drives, placed in the same EIDE interface cable see figure 1.

1

Page 2 of 3

By powering off the backup drives while not in use, the LCDB ensures that the drives' electromechanical p...