Get G-List

Overview

This function exports and saves the Grown Defect List (G-List) recorded in the disk management area (the area that cannot usually be accessed).

The drive has a function to automatically replace detected failed blocks with alternative blocks. When failed blocks are replaced, G-List information shows the location and number of replaced blocks that are recorded in the management area.

Caution

  • Execute this function only when directed by our engineer to do so.

  • Before starting this function, stop the host access.

  • Do not export the G-List while using the functions to access the drive, such as formatting, RAID migration, or Advanced Copy.

  • When exporting of the G-List is complete, save the exported G-List file immediately.

User Privileges

Availability of Executions in the Default Role

Default role Availability of executions
Monitor  
Admin  
StorageAdmin  
AccountAdmin  
SecurityAdmin  
Maintainer

Refer to "User Roles and Policies" for details on the policies and roles.

Format of a G-List Text File

The file name is "G-List_serial number for the storage system_YYYY-MM-DD_hh-mm-ss.txt". (YYYY-MM-DD_hh-mm-ss: the date and time when the download screen is displayed.)

Item Description

Serial Number

The serial number of the storage system is exported.

G-List (DE#) Information Date YYYY-MM-DD

The DE number and the date, on which the G-List information is exported, are displayed in the following format.

G-List (DE#x) Information Date YYYY-MM-DD

x: DE number

YYYY-MM-DD: Year-Month-Date

A G-List for each DE is exported in a table format.

Item Description

Drive

Drive numbers are displayed.

Type/Usage

The drive capacity and the intended use (Data/HS/Dedicated) are exported.

  • Data: Drive for user data

  • HS: Global Hot Spare (A HS which can be used in any RAID group)

  • Dedicated: Dedicated Hot Spare (A HS which can be used only in a specific RAID group)

Caution

  • The displayed drive capacity in the exported G-List may differ from the product's actual capacity. For example, the drive capacity of a "1.92 TB SSD" is displayed as "2.00 TB" and the capacity of an "18 TB Nearline SAS disk" is displayed as "17.9 TB".

Firmware

The disk firmware version is exported.

Kind

The drive type is exported.

  • 2.5" SAS: 2.5-inch SAS Disk

  • 3.5" SAS: 3.5-inch SAS Disk

  • 3.5" NL-SAS: 3.5-inch Nearline SAS Disk

  • 2.5" SSD: 2.5-inch SSD

  • 3.5" SSD: 3.5-inch SSD

  • 2.5" SED: 2.5-inch Online SED

  • 3.5" NL-SED: 3.5-inch Nearline SED

  • 2.5" SSD-SED: 2.5-inch SSD SED

  • 3.5" SSD-SED: 3.5-inch SSD SED

Vendor ID

The drive manufacturer name is exported.

Product ID

The product name of the drive is exported.

Serial Number

The serial number of the drive is exported.

G-List Information

G-List information for each drive is exported.

  • Target drive: For SAS and NL-SAS

    10 pieces of alternative source block information per drive (Cylinder (CY), Head (HD), Sector (SC)) are exported.

    TOTAL: number of reassigned blocks

    CY: Cylinder information of the alternative source block

    HD: Header information of the alternative source block

    SC: Sector information of alternative source block

  • Target drive: SSD

    10 pieces of alternative block information per drive (Channel Number (CN), NAND Block Number (NN)) are exported.

    TOTAL: Number of reassigned blocks

    CN: Channel number

    NN: NAND block number

  • For 11 or more pieces of G-List information, "..more.." is exported.

  • If the TOTAL is 0, other information is not exported.

  • If the G-List information for the corresponding drive cannot be acquired, "Error" is exported.

  • If the G-List information for the corresponding drive cannot be acquired for a status cause, "- (character string to represent the status)" is exported.

  • If the corresponding drive is being encrypted, "Encrypt Executing" is exported.

Operating Procedures

  1. Click [Get G-List] in [Action].

  2. Click the [Export] button.

    → The G-List data is created.

  3. Click the [Download] button.

    → A dialog box to download the file appears.

    Caution

    • When exporting of the G-List has been completed, save the file immediately.

  4. Save the G-List.

    The default file name is "G-List_serial number for the _YYYY-MM-DD_hh-mm-ss.txt".

    (YYYY-MM-DD_hh-mm-ss: the date and time when the download screen (Step 2) is displayed.)

  5. Click the [Done] button to return to the [Event/Dump] screen.