Method of operating storage system and storage controller

• US 10,282,260 B2
• Filed: 06/15/2016
• Issued: 05/07/2019
• Est. Priority Date: 07/21/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Ju-Pyung, Lee, Chang-Man
• Primary Examiner(s): Wilson, Yolanda L
• Application Number:
  US15/183,435
• Publication Number:
  US 20170024292A1
• Time in Patent Office: 1,056 Days
• CPC Class Codes: G06F 11/00 Error detection; Error correction; Monitoring error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00
• CPC Class Codes: G06F 11/1435 using file system or storage system metadata
• CPC Class Codes: G06F 11/1441 Resetting or repowering
• CPC Class Codes: G06F 11/1662 the resynchronized component or unit being a persistent storage device re-synchronization of failed mirror storage G06F11/2082; rebuild or reconstruction of parity RAID storage G06F11/1008
• CPC Class Codes: G06F 12/0292 using tables or multilevel address translation means G06F12/023 takes precedence; address translation in virtual memory systems G06F12/10
• CPC Class Codes: G06F 2201/805 Real-time

Abstract

The method of operating a storage system includes executing a storage service providing storage of a volume unit to at least one host device, in which the volume includes a first volume and a second volume. The method includes giving a first priority and a second priority lower than the first priority to the first volume and the second volume, respectively, and recovering meta-data for the first volume having the first priority when the storage service is stopped. The method includes starting the storage service using the recovered meta-data for the first volume, and recovering meta-data for the second volume having the second priority.

Claims

1. A method of operating a data storage system, comprising:

executing a storage service providing storage of at least a first volume and a second volume to at least one host device;

assigning a first priority and a second priority lower than the first priority to the first volume and the second volume, respectively;

recovering meta-data for the first volume having the first priority when the storage service is stopped;

starting the storage service using the recovered meta-data for the first volume; and

recovering meta-data for the second volume having the second priority,

wherein said recovering the meta-data for the first volume includes loading a first logical block address (LBA) mapping table in memory, in which the first LBA mapping table serves to map an LBA for accessing the storage of the first volume to at least one stripe defined in a storage device corresponding to the first volume.

2. The method of claim 1, wherein said recovering the meta-data for the second volume includes loading a second LBA mapping table in the memory, in which the second LBA mapping table serves to map an LBA for accessing the storage of the second volume to at least one stripe defined in a storage device corresponding to the second volume.

3. The method of claim 1, wherein said recovering the meta-data for the first volume includes recovering common meta-data for the storage service and then recovering the meta-data for the first volume, and

wherein starting the storage service includes starting the storage service using the recovered common meta-data.

4. A method of operating a data storage system, comprising:

executing a storage service providing storage of at least a first volume and a second volume to at least one host device;

assigning a first priority and a second priority lower than the first priority to the first volume and the second volume, respectively;

recovering meta-data for the first volume having the first priority when the storage service is stopped;

starting the storage service using the recovered meta-data for the first volume; and

recovering meta-data for the second volume having the second priority,

wherein the meta-data for the second volume having the second priority is freed from a memory before the meta-data for the first volume having the first priority is freed.

5. A method of operating a data storage system, comprising:

executing a storage service providing storage of at least a first volume and a second volume to at least one host device;

assigning a first priority and a second priority lower than the first priority to the first volume and the second volume, respectively;

recovering meta-data for the first volume having the first priority when the storage service is stopped;

starting the storage service using the recovered meta-data for the first volume; and

recovering meta-data for the second volume having the second priority,

wherein said recovering the meta-data for the first volume includes updating the meta-data for the first volume using a first reverse map stored in a first stripe defined in a storage device corresponding to the first volume, and

wherein said recovering the meta-data for the second volume includes updating the meta-data for the second volume using a second reverse map stored in a second stripe defined in a storage device corresponding to the second volume.

6. The method of claim 5, wherein each of the first stripe and the second stripe includes a plurality of data chunks, data chunks from among the plurality of data chunks included in the first stripe correspond to the first volume having the first priority, and data chunks from among the plurality of data chunks included in the second stripe correspond to the second volume having the second priority.

7. The method of claim 5, further comprising:

storing data in the first stripe responsive to receiving a data write request for the first volume from the at least one host device; and

storing data in the second stripe responsive to receiving a data write request for the second volume from the at least one host device.

8. The method of claim 5, further comprising:

storing stripe information about the first volume having the first priority in a first region of a non-volatile memory (NVRAM); and

storing stripe information about the second volume having the second priority in a second region of the non-volatile memory (NVRAM).