Emerson ATCA-S201 Manual

A SERVICE OF

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RTM-ATCA-SXXX Overview

6806800H62B ATCA‐S201InstallationandUseGuide63

5.3 Software RAID configuration

Administrators may use the ‘MD RAID’ menus to configure the Software AID

features of

ATCA-S201. The implementation leverages the mdadm tool available

with the 2.6.23 Linux kernel, which also offers the ability to conduct all volume setup

and configuration via a shell commands. Upon creation, a new software raid-device

will appear as a new device in web or cli configuration menus. Users may utilize the

new raid-device to create logical volumes, and configure iSCSI and NAS file shares.

The ‘MD RAID’ configuration tool appears within the html tool’s main navigation

panel on the left side as shown in the figure below.

NOTE: Software RAID should be applied before defining volume groups using the

logical volume manager (LVM).

5.3.1 Software RAID web-configuration menu usage

On a new system installation, this configuration menu enables the creation of RAID

disk(s) that will appear in the physical disk menu. Once created, RAID disks are

managed in the same manner as other physical disks, but boast benefits including

improved performance and redundancy.

Emerson ATCA-S201

iSCSI

nfs

smb

Shares

LVM2

MD RAID

 Configuration

Hardware RAID

Physica l Disks

Maintenance

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StorBlade99 ATCA-S201 Create MD RAID Volume

Available

Disk

Parent Bus Target Lun Vendor Product Rev Size Select

/dev/sda Unknown 0 1 0 HITACHI HUC101414CSS300 A410 140205MB

/dev/sdb Unknown 0 2 0 HITACHI HUC101414CSS300 A410 140205MB

/dev/sdc Unknown 0 0 0 HITACHI HUC101414CSS300 A410 140205MB

AddtoVolume R AID0 RAID1RAID4RAID5RAID6Overridewarnings

ImportFor eignarrayClearownership

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Submit

md0

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Figure 19 Emerson ATCA-S201 MD RAID (new installation screen-shot)

Parameter Description

Available Disk An enumeration of disks that may be used in new RAID LUN definition.

Parent Identifies the volume that claims ownership to a disk. ‘Unknown’ indicates disk has no

known volume ownership.

Bus/Target/Lun Identifies the SCSI parameters used to address the virtual RAID device

Vendor/Product/Rev Use these items to identify the physical disk resource.

Select

‘Radio button’ identifies which disks will participate in the new RAID LUN definition.

Add to volume

‘Radio button’ adds the selected disk(s) to an existing volume as spare disk(s).

If a volume is degraded, the volume will immediately commence a re-build operation.

RAID0

Click to create a new RAID0 LUN (stripping)

RAID1

Click to create a new RAID1 LUN (mirroring)

RAID4

Click to create a new RAID4 LUN (Fixed parity)

RAID5

Click to create a new RAID5 LUN (Rotating parity)

RAID6

Click to create a new RAID6 LUN (double parity)