LSI Corporation
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12Gb/s MegaRAID SAS Software User Guide
March 2014
Chapter 11: Maintaining and Managing Storage Configurations
Making a Drive Offline or Missing
6.
Restart the MegaRAID Storage Manager software.
When the new drive spins up, the drive icon changes back to normal status, and the rebuild process begins
automatically. You can monitor the progress of the rebuild in the
Group Show Progress
window by selecting
Manage > Show Progress
.
If you want to force a drive into Fail status to trigger a rebuild, right-click the drive icon, and select
Make Drive Offline
.
A red circle appears next to the drive icon. Right-click the icon, and select
Rebuild
from the pop-up menu.
11.4.1
New Drives Attached to a MegaRAID Controller
When you insert a new drive on a MegaRAID system and if the inserted drive does not contain valid DDF metadata,
the drive displays as JBOD for MegaRAID entry-level controllers, such as the SAS 9240-4i/8i. If the drive does contain
valid DDF metadata, its drive state is Unconfigured Good.
A new drive in JBOD drive state is exposed to the host operating system as a stand-alone drive. Drives in JBOD drive
state are not part of the RAID configuration because they do not have valid DDF records. The operating system can
install and run anything on JBOD drives.
Automatic rebuilds always occur when the drive slot status changes, for example, when you insert a drive or remove a
drive, so that a hot spare can be used. However, a new drive in JBOD drive state (without a valid DDF record), does not
perform an automatic rebuild.
To start an automatic rebuild on the new JBOD drive, you have to change the drive state from JBOD to Unconfigured
Good. (Rebuilds start on Unconfigured Good drives only.) After you set the drive state to Unconfigured Good, the
drive state information always remains on the drive, and you can use the drive for configuration.
11.5
Making a Drive Offline or Missing
If a drive is currently part of a redundant configuration and you want to use it in another configuration, you can use
the MegaRAID Storage Manager commands to remove the drive from the first configuration and change the drive
state to Unconfigured Good.
ATTENTION
After you perform this procedure,
all data on that drive is lost
.
To remove the drive from the configuration without harming the data on the virtual drive, follow these steps:
1.
In the
MegaRAID Storage Manager
window, select
Go To > Physical Drive > Make Drive Offline
.
The drive status changes to Offline.
2.
Select
Go To > Physical Drive > Mark Drive as Missing
.
The drive status changes to Unconfigured Good.
ATTENTION
After you perform this step, the data on this drive is no longer valid.
3.
If necessary, create a hot spare drive for the virtual drive from which you have removed the drive.
When a hot spare is available, the data on the virtual drive is rebuilt. You can now use the removed drive for
another configuration.
ATTENTION
If the MegaRAID Storage Manager software detects that a drive in a
virtual drive has failed, it makes the drive offline. If this situation
occurs, you must remove the drive and replace it. You cannot make the
drive usable for another configuration by using the
Mark physical
disk as missing
command and the
Rescan
commands.
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