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Method, equipment and devices of processing disk roaming

A technology for disks and devices, applied in the storage field, can solve problems such as dealing with disk roaming, and achieve the effects of improving accuracy, avoiding bus drift, and improving reliability

Active Publication Date: 2018-07-06
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method, device and device for processing disk roaming, which can solve the problem that the prior art method cannot handle disk roaming in a non-volatile high-speed transmission bus (Non-Volatile Memory Express, NVMe) storage device problems, in order to improve the reliability of the entire storage system

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  • Method, equipment and devices of processing disk roaming
  • Method, equipment and devices of processing disk roaming
  • Method, equipment and devices of processing disk roaming

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0047] For disks of the Serial Attached SCSI (SAS) or Serial Advanced Technology Attachment (SATA) type, since the RAID controller is connected to each disk through the port of the RAID controller, the SAS Or the location number of the SATA disk is the port number connecting the disk to the RAID controller, and the RAID controller can record the correspondence between the disk cluster (Just a Bunch of Disk, JBOD) number, slot number, and SAS address of the member disks in the RAID group When a member disk is re-plugged or replaced, the RAID controller can record the member disks of the RAID group according to the corresponding relationship between the disk cluster (Just a Bunch of Disk, JBOD) number, slot number, SAS address, etc. Identify roaming disks or hot-swappable disks,...

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Abstract

The application relates to a method, equipment and devices of processing disk roaming. The method is applied to an NVMe (Non-Volatile Memory express) storage device including an RAID (Redundant Arrayof Independent Disk) controller and a plurality of SSDs (Solid State Disks). The RAID controller manages the SSDs according to NVMe interface standards, and the two parts communicate through a PCIe (Peripheral Component Interconnect Express) bus. The RAID controller records a first mapping table including correspondence relationships of global unique Identification (GUID) of each SSD and a bus number, a device number and a function number. The method includes: acquiring GUID, bus numbers, device numbers and function numbers of all the SSDs in the storage device by the RAID controller when thestorage device is re-powered on; updating the first mapping table according to the GUID, the bus numbers, the device numbers and the function numbers which are of all the SSDs and are acquired in re-powering-on and the first mapping table; and restoring RAID relationships in the storage device according to the updated first mapping table. Therefore, roaming disks in the NVMe storage device are quickly identified, and the RAID relationships are restored.

Description

technical field [0001] The invention relates to the field of storage, in particular to a method, device and device for processing disk roaming in a non-volatile high-speed transmission bus storage device. Background technique [0002] As redundant array of independent disks (Redundant array of Independent Disk, RAID) are widely used in servers, common RAID controllers can manage multiple RAID groups, and each RAID group includes multiple disks. When creating RAID, the RAID controller will The metadata information is used to record the drive letter sequence of the member disks in the RAID group, so as to read and write data. When the maintenance personnel take out the disks and insert them into different slots, or when the disks are plugged and unplugged in the power-on state, the RAID The phenomenon that the sequence of drive letters in the group changes and is inconsistent with that of the RIAD group is called disk roaming. At this time, disk roaming occurs in the RAID con...

Claims

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Application Information

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IPC IPC(8): G06F3/06
CPCG06F3/0689
Inventor 徐晓忻郭海涛吴登奔
Owner HUAWEI TECH CO LTD
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