Dell PowerEdge RAID Controller S100 - Manual (Page 24)

24 Features
Mirror rebuilding A broken mirror can be rebuilt after a new physical disk is
inserted and the physical disk is designated as a hot spare.
The system does not have to be rebooted.
Online Capacity
Expansion (OCE)
OCE is a process that allows you to add storage capacity to an
existing virtual disk. In most cases additional storage capacity
can be added without taking the system offline. However, if
an additional physical disk needs to be added and the system
does not support hot-swapping, the system must be turned
off.
OCE enables you to increase the total storage capacity of a
virtual disk by integrating unused storage with the virtual
disk.
Data can be accessed while the physical disks are added (if a
system has hot-swap capability) and while data on the virtual
disk is being redistributed.
For Volume and RAID 1, OCE expands the virtual disk by
using the available space of the physical disks that are already
members of the virtual disk. For RAID 0, RAID 5 and RAID
10, additional capacity can be attained by adding physical
disks to the virtual disk.
Physical disks
(general)
The PERC S100 adapter supports up to four SATA HDD or
SSD physical disks. The PERC S300 adapter supports up to
eight SAS or SATA HDD physical disks.
NOTE: The physical disks in a virtual disk must be the same
interface and drive type (HDD or SSD). For example, you cannot
mix a SATA and SAS interface (HDD or SSD), or HDD and SSD
physical disks, in the same virtual disk.
A maximum of eight physical disks can be used for RAID 0
and RAID 5. A maximum of two physical disks can be used
for RAID 1. A maximum of four physical disks can be used for
RAID 10.
If a physical disk fails during system startup, the controller
identifies the failed physical disk as follows:
• At the PERC Virtual Disk Management utility by
highlighting the failed physical disk in a virtual disk in red.
Table 3-1. Features of the PERC S100 controller and PERC S300 controller (continued)
RAID Controller Feature Description
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