REC Disk Buffer

Overview

This function displays the existing REC Disk Buffers in the storage system.

Caution

  • Drives are not monitored for bad sectors when the drives configure the REC Disk Buffer.

Note

  • This function is displayed only when the Advanced Copy function license has been registered and a storage system model that supports REC is used.

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.

Display Contents

The REC Disk Buffer status is displayed on a list.

REC Disk Buffer List

Item Description

No.

The RAID group number of the REC Disk Buffer is displayed.

Click this item to display the [REC Disk Buffer Detail] Screen.

Name

The REC Disk Buffer name is displayed.

Click this item to display the [REC Disk Buffer Detail] Screen.

Status

The REC Disk Buffer status is displayed.

Refer to "RAID Group Status" for details.

Total Capacity

The total capacity of the REC Disk Buffer is displayed.

Controlling CM

The Controlling CM of the REC Disk Buffer is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y

For the other models

CM#y

x: CE number

y: CM number

REC Buffer

The management group number of the REC Buffer to which the REC Disk Buffer is assigned is displayed.

A "-" (hyphen) is displayed for an REC Disk Buffer that is not assigned to any REC Buffers.

ETERNUS DX100 S5: 0

ETERNUS DX200 S5: 0 - 3

ETERNUS DX500 S5/DX600 S5/DX900 S5: 0 - 7

ETERNUS DX8100 S4/DX8900 S4: 0 - 7

ETERNUS AF150 S3: 0

ETERNUS AF250 S3: 0 - 3

ETERNUS AF650 S3: 0 - 7

Encryption

The encryption status of the REC Disk Buffer is displayed.

  • CM: Encryption by CM

  • "-" (hyphen): Unencryption

  • SED: Encryption by SED

Process

A process that is being performed for the REC Disk Buffer is displayed. If no process is being performed, a "-" (hyphen) is displayed.

  • Recovering

    Rebuild, copyback, redundant copy, or recovery of the RAID group is being performed.

  • Formatting

    Formatting is being performed.

[REC Disk Buffer Detail] Screen

[Basic] Tab

Detailed information of the RAID group to be used as an REC Disk Buffer is displayed.

The RAID group number and the RAID group name of the REC Disk Buffer are displayed.

REC Disk Buffer Information

Item Description

Status

The RAID group status is displayed.

Refer to "RAID Group Status" for details.

Total Capacity

The total capacity of the RAID groups is displayed.

Controlling CM

The Controlling CM of the RAID group is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y

For the other models

CM#y

x: CE number

y: CM number

REC Buffer

The management group number of the REC Buffer to which the REC Disk Buffer is assigned is displayed.

A "-" (hyphen) is displayed for an REC Disk Buffer that is not assigned to any REC Buffers.

ETERNUS DX100 S5: 0

ETERNUS DX200 S5: 0 - 3

ETERNUS DX500 S5/DX600 S5/DX900 S5: 0 - 7

ETERNUS DX8100 S4/DX8900 S4: 0 - 7

ETERNUS AF150 S3: 0

ETERNUS AF250 S3: 0 - 3

ETERNUS AF650 S3: 0 - 7

Encryption

The encryption status of the REC Disk Buffer is displayed.

CM: Encryption by CM

"-" (hyphen): Unencryption

SED: Encryption by SED

Process

A process that is being performed for the REC Disk Buffer is displayed. If no process is being performed, a "-" (hyphen) is displayed.

Recovering

Formatting

Progress

The progress (0 to 100 %) of a process that is being performed is displayed.

Stripe Depth

The Stripe Depth (*1) of the RAID group is displayed.

64 KB

128 KB

256 KB

512 KB

1024 KB

*1  :  This is the number of logical blocks assigned to one drive per stripe when a volume is striped to configuring drives of a RAID group. Normally, it is 64KB.

[Drives] Tab

Drives configuring the REC Disk Buffer are displayed.

The RAID group number and the RAID group name of the REC Disk Buffer are displayed.

REC Disk Buffer Information

Item Description

Enclosure

The enclosure where the drive is installed is displayed.

   CE: Controller Enclosure (2.5" and 3.5")

   DE: Drive Enclosure (2.5", 3.5", and 3.5" high density DEs)

CE#x

DE#yy

x: CE number

yy: DE number

Slot No.

The slot number of the enclosure where the drive is installed is displayed.

2.5" CE/DE: 0 - 23

3.5" CE/DE: 0 - 11

3.5" high density DE: 0 - 59

Status

The drive status is displayed.

Refer to "Drive Status" for details.

Drive Type

The drive type displayed for this item is a combination of the following.

  • Drive size

    • For 2.5-inch drives: 2.5"

    • For 3.5-inch drives: 3.5"

  • Drive type

    • For SAS disks: Online

    • For Nearline SAS disks: Nearline

    • For SSDs, the following items are displayed depending on the SSD type.

      • For SSD-Hs (12 Gbit/s): SSD-H (*1)

      • For SSD-Ms (12 Gbit/s): SSD-M (*1)

      • For SSD-Ls (12 Gbit/s): SSD-L (*1)

Note that "SED" is also displayed for self encrypting drives and "AF" is also displayed for Advanced Format compliant drives.

*1  :  The displayed item varies depending on the interface speed (bandwidth) or the capacity of the reserved space. Unless otherwise specified, "SSD-H", "SSD-M", and "SSD-L" are collectively referred to as "SSD". In addition, there may be cases when "SSD SED" is used as the collective term for self encrypting SSD-Hs, SSD-Ms, and SSD-Ls.

Capacity

The capacity of the drive is displayed.

Caution

  • The displayed drive capacity 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".

Speed

The drive speed is displayed.

For SSD or SSD SED, a "-" (hyphen) is displayed.

15000 rpm

10000 rpm

7200 rpm

Usage

The usage of the drive is displayed.

Data

Global Hot Spare

Filter Setting

Function Description

Filter setting is a function used to display a list of only the REC Disk Buffers satisfying all the specified conditions.

No filtering is set by default. The following table shows conditions that can be specified.

Item Description Setting values

Name

Input the REC Disk Buffer name that is to be displayed.

REC Disk Buffer names matching or partially matching the entered name are displayed.

When not using the REC Disk Buffer name for filtering, leave this item blank.

REC Disk Buffer name

Blank

Status

Select the REC Disk Buffer status to be displayed.

When not using the REC Disk Buffer status for filtering, select "All".

All

Refer to "RAID Group Status".