Computer system and method for inheriting HBA identifier of PCI card

摘要

A PCI card's HBA identifier table held in an IODC in an IO slot expansion unit is read and recorded on a PCIe switch register of a PCIe switch. After a server blade is powered on so that an EFI is activated, the EFI reads the HBA identifier table recorded on the PCIe switch register and updates an HBA identifier of an HBA mounted in each PCI card. The HBA mounted in the PCI card operates with the updated HBA identifier of the PCI card. Thus, even when the PCI card is replaced by a new PCI card because of failure or the like, the new PCI card can operate with the same HBA identifier as that before the replacement. Therefore, a user does not have to register the HBA identifier of the PCI card newly in a device connected to the PCI card.

主权项

1. A computer system formed so that a server chassis having at least one server and an IO slot expansion unit loaded with a PCIe switch are connected to each other by a PCIe cable,wherein:
the server has an arithmetic portion, a storage portion, and an HBA identifier update control portion; the IO slot expansion unit has the PCIe switch, an IO slot expansion unit controller connected to the PCIe switch, and a plurality of PCI card slots connected to the PCIe switch; a first PCI cards having a first HBA and a first HBA port is mounted in a first PCI card slot, the first PCI card slot is identified by a first PCI card slot identifier, and the first HBA port is assigned a first port number; the first HBA has a first identifier area which is arranged to hold a first allocated identifier by which the first HBA port is identified; the PCIe switch has a PCIe switch register; the IO slot expansion unit controller has a PCIe switch register update control portion and an identifier allocation table for managing the first PCI card slot identifier of the first PCI card slot, the first port number of the first HBA port on the first PCI card, and the first allocated identifier corresponding to the first PCI card slot identifier; the PCIe switch register update control portion is arranged to copy the identifier allocation table of the IO slot expansion unit controller to an identifier storage area of the PCIe switch register in the PCIe switch in response to powering on the IO slot expansion unit; and the HBA identifier update control portion is arranged to: acquire the identifier allocation table copied to the identifier storage area of the PCIe switch register in the PCIe switch through the PCIe cable in response to powering on the server; store the acquired identifier allocation table in the storage portion of the server; refer to the first allocated identifier corresponding to the first PCI card slot identifier and the first port number of the first HBA port on the first PCI card in the identifier allocation table stored in the storage portion; and in a case where the first PCI card is replaced with a second PCI card having a second identifier area and a second HBA port in the first PCI card slot connected to the PCIe switch, update an allocated identifier of the second HBA port, which is assigned the first port number, in the second identifier area to the first allocated identifier.