Intel SRCMR, User Manual

Page: 157 / 180

Storage Console Plus 157
CAUTION
Before starting an expansion it is absolutely necessary to back up all data on the system. If the
expansion process includes a new, unknown hard disk and there are problems with this disk or with
the cabling of this disk, then there is a risk of data loss. Some expansions take a long time, so it is
advisable that there be a minimal amount of traffic on the system.
Add a Hot Fix Drive
Click the right mouse button on the array drive icon.
Use this option to add a hot fix terms_hot_fix drive to an array drive (RAID 1/4/5/10). Add a
private hot fix drive or a pool hot fix drive. Private hot fix drives are assigned to a specific array
drive and are activated if a member of this array drive fails. Pool hot fix drives can be used by any
array drive with pool hot fix access enabled. RAID 1 array drives allow only pool hot fix drives.
After choosing the type of hot fix drive, you can select a physical drive from the box that shows all
suitable drives.
Figure 96. Add Hot Fix Drive
The capacity of the hot fix drive has to be larger or equal than the capacity of the components of the
array drive. For example: The logical drives of the array drive have 4.2GB capacity, thus the
capacity of the hot fix drive has to be 4.2GB or larger.
The spindle motor of the hot fix drive is normally stopped (for example, when the hot fix drive is
not needed). Thus, it may take a few seconds to get a response when you click on that drive.
Some general notes on hot fix drives.
One of the reasons RAID array drives are used, lies with the data redundancy they provide, that is,
the data security you have in the event of a hard disk failure. For the purpose of the following
considerations, we define the term time without redundancy (TWR) as the time it takes to replace a
failed hard drive (assuming there is no hot fix drive installed in the system). The time without
redundancy should be kept as short as possible, not including the time needed to set up the array
drive (state build).
Let us assume that one of the hard disks of a RAID 5 array drive fails. The array drive is without
redundancy. TWR begins. Any superfluous prolongation of the TWR (because you have to get a