Managing Storage On The Wd Sentinel Server; Wd Sentinel Server Raid Storage - Western Digital WDBLGT0040KBK Administrator's Manual

Managing Storage on the WD Sentinel Server

5

WD Sentinel Server RAID Storage

Using USB Storage
Replacing a Failed Drive
Adding Capacity by Adding a Drive
WD Sentinel Server RAID Storage
RAID is the acronym for Redundant Array of Independent Disks. The WD Sentinel
server provides automatic RAID service to assure the integrity of the storage system.
For redundancy, a minimum of two drives must be active. The operating system and
all data are protected by the RAID structure. The server automates the management
of the RAID.
With two drives installed into the system, RAID 1 (mirror) is employed. With three or
four drives installed, RAID 5 offers fast performance by striping data across all drives,
These RAID levels provide the system with both redundancy and optimum capacity.
RAID Level 1 (2 Drives)
RAID Level 5 (3 Drives)
RAID Level 5 (4 Drives)
If a drive in the array fails, the data and operating system are still intact, and the
WD Sentinel server continues to provide service.
Important: If you have one bad drive, the server operates normally. However, if a
The WD Sentinel server lets you know that a drive has failed in the following ways:
The message "STORAGE DEGRADED" appears on the WD Sentinel server
LCD.
The LED above the bad drive is solid red.
The Power LED on the WD Sentinel server flashes red, indicating a serious
fault.
An email Alert is posted if you have set it up to do so. (See "Monitoring
System Health and Alerts" on page
To recover from a failed drive, simply replace the drive (the one with the red LED over
the bay door) with an approved drive for the WD Sentinel server (see "Find
compatible hard drives" on page 24). The WD Sentinel server validates the replaced
drive and automatically integrates it into the RAID array. This operation takes many
hours to accomplish. Progress of this operation appears on the display as well as on
the Dashboard. It is not necessary to power off or disengage the WD Sentinel server
WD SENTINEL DX4000
ADMINISTRATOR'S MANUAL
2 TB Drives
2 TB Capacity
4 TB Capacity
6 TB Capacity
second drive fails, the server will no longer operate. You will need to
recover the server and/or replace the failed drive. A best practice is
to have a replacement drive readily available.
MANAGING STORAGE ON THE WD SENTINEL SERVER
3 TB Drives
3 TB Capacity
6 TB Capacity
9 TB Capacity
22.)
31