Lenovo ServeRAID M5110, User Manual, Page: 33 / 72

1-18 Overview
1.6.9 New Drives Attached to a ServeRAID Controller
In the Integrated RAID mode, when you insert a new drive with valid
metadata into a ServeRAID system, the drive state of the new drive is
either foreign or unconfigured bad.
The specific drive state depends on the Maintain PD Fail History setting,
and whether the drive had been inserted in the system before. The
Maintain PD Fail History setting, when enabled, maintains the history of
all drive failures.
A foreign configuration is a storage configuration that already exists on
the new drive that you install in the system. The configuration utilities
allow you to import the foreign configuration to the controller, or to clear
the configuration so you can create a new configuration using the new
drive.
Note: See the ServeRAID-M Software User’s Guide for the
procedures used to import a foreign configuration or
change a drive state from unconfigured bad to
unconfigured good.
1.6.10 Automatic Rebuilds on New Drives
Automatic rebuilds occur when the drive slot status changes. For
example, an automatic rebuild occurs when you insert a new drive or
when you remove a drive and a hot spare replaces the removed drive.
1.6.11 System (JBOD) Drives
The iMR mode supports drives in pass-through mode, which are
identified as "system" drives. These drives are also known as JBOD (Just
a Bunch of Disks) drives. When a drive without valid metadata is inserted
in a system, if the drive has a drive state of unconfigured good, it is
identified as unconfigured good; otherwise, the drive is marked as a
system drive.
System drives are exposed directly to the operating system. The host
system can read data from and write data to the system drives; however,
you cannot use system drives in a RAID configuration.