View Drive Assignments - TYAN TOMCAT I915 User Manual

Tomcat i915 S5120
Performance
RAID 0 (Stripe) supports higher read/write performance. The storage capacity
equals the number of drives times the capacity of the smallest drive in the disk array.
Under the Performance setting, FastTrak assigns two drives to a single Striped
array. If you want a one-drive array, or you want to specify block size, see Create
Arrays Manually.
Security
RAID 1 (Mirror) creates a fault tolerant array for data security. The storage capacity
equals one-half the number of drives times the capacity of the smallest drive in the
disk array.
Under the Security setting, FastTrak assigns two drives to a single Mirrored array.
Hot Spare Drive
If a third drive is attached and is not assigned to a mirrored two-drive Mirrored
(RAID 1) disk array, it will be recognized as a spare drive. Such a drive is
automatically used as a standby replacement. When FastTrak detects that one of
the drives in the array has failed, it assigns the hot spare drive to take its place.
To restore fault tolerance as quickly as possible, FastTrak begins an automatic data
rebuild on the hot spare drive in the background. There is no need to restart the
system.
At any time, you can replace the failed drive with a new one of the same model and
size. FastTrak will automatically recognize the new drive as a hot spare.

4.5.4 View Drive Assignments

The View Drive Assignments (2) option in the Main Menu displays whether drives are
assigned to a disk array or are unassigned.
Under the Assignment column, drives are labeled with their assigned disk array or shown as
Free if unassigned.
Free drives can be used for a future array or as a spare drive when a drive fails in a mirrored
array, provided the free drive's capacity is equal to or larger than the smallest array member.
Unassigned drives are not accessible by the OS.
The menu also displays the data transfer mode that relates to speed used by each drive (U
refers to Serial ATA).
Chapter 4: SATA/RAID Setup (for SATA RAID model)
The hot spare drive must have a capacity that is equal to or larger than
the smallest array member.
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Important
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