User`s manual

Sans Digital – EN104L+(B) Admin Guide

Storage Management – RAID Volume Manager

The EN104L+(B) LB model equipped with build-in RAID 0, 1, 5, 6 support.

The RAID Volume Manager interface in the Web Administrator allows the administrator to:

Discover disk drives available for RAID configuration.

Create, remove, rebuild, and expand multiple RAID volumes.

Assign and remove hot spare to/from existing RAID volume.

Identify external SATA hard disk drive used for backup purpose.

CAUTION: external SATA hard disk drive must not be configured as part of RAID volume. Since external SATA hard disk drive is

recognized as a standard SATA hard disk drive, administrator must keep in mind of its capacity and model to differentiate from other disk

drives.

Creating RAID Volume(s):

Select available disks from Disk Pool. These disks are ready to be assigned to the desired RAID volume.

Select desired RAID type. Only possible RAID types will appear as selection option. Choose from RAID 0, 1, 5, and 10

Refer to Storage Management Overview for RAID volume type definitions.

Select desired stripe size for the RAID volume.

Select Rebuild Speed from High, Medium or Low. Rebuild speed sets the priority of resource allocation between data serving and RAID

volume rebuilding. High setting will put rebuilding process on higher priority than data serving to clients’ request.

Select CREATE RAID & ASSIGN SPARE. Same button is used to create RAID or assign hot spare.

When asked to confirm RAID creation, select YES. CAUTION: Creating RAID volume will erase data on the disk(s) assigned to the RAID

volume

RAID will start to build. RAID creation process can be verified by web administrator page displaying RV in the RV Pool while assigned disks

from Disk Pool are removed. The status will show as (clean, degraded, recovering xx% complete)*. Software RAID Manager will refresh every

30 seconds to show updated progress and status of RAID, hot spare and disk.

RV is identified with RAID type, RAID volume ID#, total capacity, disks assigned to the RV (RV member), Remove RV option and RAID volume

consistency check.

To help with RV member identification to associate disk ID shown on the web administrator and physical disk, disk blink button (blue button

next to disk status) is provided. Clicking on it will blink the LED on physical disk until the button is clicked again.

After RAID volume is created, status changes to (OK)*. In addition, Remove option for individual disk assigned to the RV (RV member) is

offered. CAUTION: Voluntary removal of properly functioning disk assigned to a RAID volume is not recommended. Such action will place

RAID volume in degraded mode and failure of another RV member can result in fatal error.

Remove option for RAID volume is used to completely remove the RAID volume and replace its members (disks) back to Disk Pool.

Remove option for RV members removes the disk from the RV and places it in the Disk Pool. This option should only be used when the

administrator wishes to re-assign the disk to another RAID volume without such action causing fatal error to the existing RV. RAID signature

on the RV member is erased during the removal process.

*RAID Volume Status Definition:

RAID build, Rebuilding with hot spare: (clean, degraded, recovering, xx% completed). xx = number to indicate progress.

RAID in good status: (OK)

RAID in degraded mode: (clean, degraded) + Inoperable status next to the disk that failed & removed from the RAID volume. Inoperable disk

is shown in Disk Pool.

Adding & Removing Hot Spare/RAID Volume Expansion:

Adding a hot spare requires selection of existing RV and assigning an available disk in the Disk Pool. Hot spare is assigned to a RV individually;

as a result, RV without hot spare assigned cannot have automatic recovery.

Select existing RV from the RV Pool

Select available disk from the Disk Pool. Hot spare must be same or greater is capacity than the RV member.

Select CREATE RAID & ADD SPARE.