ICP GDT RS Series, User Manual

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an Array Drive. The user data on the drives is read, parity information is calculated from this
user data and the parity information is written anew.
While the parity recalculate is in progress the array is in the build state. During this time
the Array Drive is not redundant. You can view the progress of the build process by when
you click the right mouse button on the Array Drive icon and select progress information.
After the parity recalculate is completed the Array Drive's state changes again into ready
with the addition ‘/patch’. This notification has no relevance for the operation of the Array
Drive but is a reminder that the parity information of this Array Drive has been recalculated
once.
K.5.9 Progress Information
Click the right mouse button on the Array Drive or Physical Drive icons.
The progress information window shows the progress (elapsed time, estimated time, per-
centage of completion) of a parity verify, a disk array build or a surface check. During an Ar-
ray Drive rebuild, the information (user data and/or parity) of a specific Logical Drive is
calculated from the user data and parity information of the other Logical Drives and written
to this new Logical Drive. During a build of an Array Drive parity information is calculated
and written to a specific Logical Drive (RAID 1/4) or striped over the Array Drive (RAID 5).
The estimated time indicates the time needed by the controller to finish this process if the
user load on the controller does not change. The elapsed time is reset when opening the
window.
K.5.10 Expansion of an Array
Click the right mouse button on the Array Drive icon.
There are two fundamental functions which are available within this option:
Migrate the RAID level of the selected RAID Array Drive (RAID 0-> RAID 4 and vice versa,
RAID 0 -> RAID 5 and vice versa) and/or
Expand the capacity of the selected Array Drive by adding one or several new hard disks.
Both functions can be selected at the same time. E.g., migrate from RAID 0 to RAID 5 and
add a new drive. To initiate a migration or expansion with a RAID 4/5 Array Drive, the state
must be ready. The data on the Array Drive remain intact and are not affected by the expan-
sion. The additional capacity is introduced as new Host Drive. If a Logical Drive fails during
the expansion, the expansion process continues until the expansion is finished. The Array
Drive changes into the fail state. The new capacity is available as a new Host Drive. Win-
dows NT (Tool: Disk Administrator) and Novell NetWare ("Scan for new Devices"
and then
Tool: Install) allow the online integration of new disk capacity. Depending on the RAID level
the current Array Drive has, selecting a different one here, will cause the Migration of the
RAID level of the Array Drive. If you select the same RAID level, the following procedure will
expand the capacity of the Array Drive, only.