REC Disk Buffer

Overview
Display Contents

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.

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. CE#n CM#n or CM#n
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. 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.

CE#n CM#n or CM#n

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.

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

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 DE: Drive Enclosure CE#n DE#n
Slot No.	The slot number of the enclosure where the drive is installed is displayed.
Status	The drive status is displayed. Refer to Drive Status for details.
Drive Type	Refer to Drive Type for details.
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".
Speed	The drive speed is displayed. For SSD, NVMe SSD, SSD SED, or NVMe SSD SED, a "-" (hyphen) is displayed. 10000 rpm 7200 rpm
Usage	The usage of the drive is displayed. Data Global Hot Spare