ICP GDT6618RD, Addendum

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C.4.6.6 Menu Advanced Setup: Configure Array Drives, Remove Array Drive
This command allows you to remove an existing Array Drive.
All the data of the Array Drive will be lost !
Before you confirm the security request with <Y>, you
should be sure about this choice.
Note: If an Array Drive has been removed, it can perhaps be rebuilt without data loss if it is
reconstructed in the exact same order it had been built before, if the components of the
Array Drive, that is the Host Drives, have not been modified, if the stripe size and RAID
level is the same and if a Non-Destructive Build is carried out. In all other cases ALL DATA
WILL BE LOST !
C.4.6.7 Menu Advanced Setup: Configure Array Drives, Add Hot Fix Drive
This submenu option allows you to add a Hot Fix drive to an existing RAID 1, RAID 4, RAID
5, or RAID 10 Array Drive. There are two different types of Hot Fix drives:
Private and Pool Hot
Fix drives. A Poo l Hot Fix Drive is a spare drive within the so-called Hot Fix Pool. A drive in a
Hot Fix Pool is available for several Array Drives as a Hot Fix drive. Thus, several Array
Drives can share one Hot Fix drive. Of course, once this drive has been used by one of the
Array Drives, it is no longer available for the others. A P
rivate Hot Fix drive is dedicated to
one RAID 1, RAID 4, RAID 5 or RAID 10 Array Drive.
Only drives that meet the following requirements are suitable as Hot Fix drives:
1. The Logical Drive that is to become a Hot Fix drive must not be an active component
of another Array Drive.
2. The Logical Drive that is to become a Hot Fix drive must have a storage capacity
greater than or equal to the storage capacity of the smallest Logical Drive of the Array
Drive. Example: A type RAID 5 Array Drive consists of the following components:
Logical Drive 0
2000MB
Logical Drive 1 1500MB
Logical Drive 2 1100MB
Logical Drive 3 2000MB
This Array Drive has a usable storage capacity of 3300MB. A Hot Fix drive for this ar-
ray must have at least 1100MB of storage capacity. (Note: in order not to waste valu-
able storage capacity, it is strongly recommended that all Logical Drives forming an
Array Drive have the same storage capacity.)
What happens after a drive failure ?
The controller will substitute a failed Logical Drive with a Hot Fix drive only if the Array
Drive was in the
ready state before the failure, or, in other words, a Hot Fix drive can only be
activated if the corresponding Array Drive had a state of data redundancy at the moment of
failure.
1. After a short while, the controller's alarm turns on.
(Note: the alarm is activated only when the Array Drive is being accessed.)
2. The controller activates the fail operation mode. In this mode, the Array Drive remains
fully operational. The data located on the failed drive is generated by means of the re-
dundancy information stored on the other drives, without causing any decrease in per-
formance.
3. The controller integrates the Hot Fix drive into the Array Drive and starts to reconstruct
the data and redundancy information. The Array Drive is now in the
rebuild operation
mode.