Virtual Disk - NEC Express5800 User Manual

Virtual Disk

Virtual disk is a logical drive defined in disk group. It is recognized as a physical drive by OS. The
allowable number of virtual disks is up to 8 per disk group, or up to 8 per controller.
The figure below shows a sample configuration in which the Onboard RAID Controller (LSI
Embedded MegaRAID™) is connected with two HDDs, creating one Disk Group. Two RAID1
virtual disks (VD) are defined in the Disk Group.
Hot-Spare
The hot-spare is prepared as an auxiliary HDD substituting for a defected HDD included in a disk
group which is configured at a redundant RAID level. Detecting a HDD fault, the system
disconnects the HDD (or makes it offline) and starts rebuild using the hot-spare.
RAID Controller
VD0-1
50GB
VD1-1
30GB
HDD 1
(80 GB)
Configuring Your Server 4-25
DG0 160 GB
VD0 (RAID1)
VD0-2
50 GB
50GB
VD1-2
VD1 (RAID1)
30GB
30 GB
HDD 2
(80 GB)