Link negotiation method and device of solid state disk cluster JBOF, equipment and storage medium

Abstract

The invention discloses a link negotiation method and device of a solid state disk cluster JBOF, equipment and a storage medium. The method comprises the following steps: detecting a first in-place state of a cable at a machine head end, and configuring a downlink port of the machine head end to be opened or closed according to the first in-place state; detecting a second in-place state of the cable at the JBOF end of the solid state disk cluster, and configuring the JBOF end of the solid state disk cluster to be powered on or powered off according to the second in-place state; and in responseto the confirmation that the downlink port of the machine head end is opened and the solid state disk cluster JBOF end is powered on, performing PCIE link negotiation on a cable between the machine head end and the solid state disk cluster JBOF end. According to the scheme provided by the invention, PCIE link negotiation is carried out on the cable only when the downlink port is opened and the solid state disk cluster JBOF end supplies power, so that limitation on cable plugging or manual intervention is not needed, the risk that a PCIE state machine of a machine head or a JBOF enters an abnormal state and cannot jump out is reduced, and the success rate of link negotiation is remarkably improved.

Description

technical field [0001] The present invention relates to the field of storage technology, and more particularly relates to a link negotiation method, device, equipment and storage medium of a solid-state disk cluster JBOF. Background technique [0002] With the development of information technology, the application requirements of storage systems are increasing, and the increasing business volume requires higher and higher requirements for the stability, reliability, security, and transmission efficiency of storage systems. The disks supported by storage include mechanical hard disks, SAS (Serial Attached SCSI, Serial Attached SCSI interface) disks and the fastest NVMe (Non-Volatile Memory express, non-volatile high-speed transmission bus) disks. At present, there are mature solutions for mechanical hard disks and SAS disks, and JBOD (Just a Bunch Of Disks, disk clusters) that support hot-swapping, while faster NVMe disks have ejection heads, and solid-state hard disk cluster...

AI Technical Summary

Problems solved by technology

When the cables are hot-plugged, they can only be inserted one by one. After the head driver and the pcie switch of JBOF detect that the link can be negotiated, they will perform link negotiation, so even if the hands are fast, they can only negotiate the link at most. X8

And if the head drive intervenes to renegotiate, it is impossible to know that the cables at the JBOF end are all inserted, so part of it is stipulated in the user manual that the cables must be inserted into the JBOF end first, which is inconvenient to operate

In addition, another solution is to negotiate several x4 links with several cables, but in this way, the disks on the JBOF end must be evenly distributed to 4 links, which actually reduces the bandwidth between the machine head and the PCIE switch, and reduces the efficiency

Images