JBOF connection method, device and system based on PCIe link

Abstract

The invention discloses a JBOF connection method, device and system based on a PCIe link and a storage controller. The method comprises the steps that the storage controller determines the connectionstate of a PCIe cable adapter card and JBOF equipment according to the PCIe configuration information, obtained through the PCIe cable adapter card, of the JBOF equipment; when the connection state ischanged, hot plug processing is carried out on the JBOF equipment, and the JBOF equipment is added or removed; wherein an x16 downlink interface of the PCIe cable adapter card is connected with the JBOF equipment through four x4SAS cables; a common SAS cable is adopted to replace a standard PCIe cable, the problem that material preparation of the PCIe cable is difficult is avoided, hot plug processing is conducted on the JBOF equipment when the connection state is changed, the problem that hot plug processing cannot be achieved due to the fact that the SAS cable does not have PRSNT signals isavoided, and the reliability of a PCIe link is guaranteed.

Description

technical field [0001] The invention relates to the storage field, in particular to a PCIe link-based JBOF connection method, device, system and storage controller. Background technique [0002] In the field of storage, it is well known that solid-state drives (SSDs) have faster read and write speeds than mechanical hard drives (HDDs). Most machines currently use the SATA (Serial ATA, Serial ATA) bus standard, and the actual maximum transmission is about 600MB / s. The actual transmission speed of SSDs that support PCIe (peripheral component interconnect express, a high-speed serial computer expansion bus standard) bus and NVMe (Non-Volatile Memory express, a hard disk transmission standard) protocol will exceed 1000MB / s. [0003] In order to expand the storage capacity, it is necessary to use JBOF (Just a bunch of nvme Flash, nvme hard disk expansion cabinet) equipment to expand and connect more nvme hard disks. There are nvme SSD hard drives. [0004] In the prior art, th...

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Problems solved by technology

[0004] In the prior art, the front end of the JBOF device is often connected to the storage controller based on the Nof of Ethernet. This method requires the use of a protocol conversion card, which is costly, complex in protocol, and not directly connected to the disk; and although there are such figure 1 The JOBF device shown is based on the direct connection method of the PCIe link, that is, the front end of the JBOF device is connected to the storage controller through a PCIe cable across the chassis. "PCI_Express_External_Cabling" defines the PCIe cable standard, but there is no supplier on the market. This kind of PCIe cable is difficult to prepare

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