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7. Set the spanning mode for the current logical drive. Highlight Span from the bottom
window of the logical drive configuration screen and press
ENTER
. The choices are:
CanSpan Array spanning is enabled for the current logical drive. The logical drive can
occupy space in more than one array.
NoSpan Array spanning is disabled for the current logical drive. The logical drive can
occupy space in only one array.
For two arrays to be spannable, they must have the same stripe width (they must contain
the same number of physical drives) and they must be consecutively numbered. If Array
2 contains four disk drives, it can be spanned only with Array 1 and/or Array 3, and
only if Arrays 1 and 3 also contain four disk drives. If the two criteria for spanning are
met, MegaRAID automatically allows spanning. If the criteria are not met, the Span
setting makes no difference for the current logical drive. Highlight a spanning option
and press
ENTER
.
The spanning options are:
Configuring RAID 10, RAID 30, or RAID 50 Logical Drives.
Configure RAID 10 by spanning two to four contiguous arrays, each containing one
RAID 1 logical drive. The RAID 1 logical drives must have the same stripe size. For
example, you can use the span option to configure up to four pairs of RAID 1 drives. Up
to eight physical drives can appear as one large RAID 1 logical drive.
Configure RAID 30 by spanning two to four contiguous arrays, each containing one
RAID 3 logical drives. The RAID 3 logical drives must have the same stripe size.
Configure RAID 50 by spanning two to four contiguous arrays, each containing one
RAID 5 logical drives. The RAID 5 logical drives must have the same stripe size.
8. Set the logical drive size. Move the cursor to Size from the bottom window of the
logical drive configuration screen and press
ENTER
.
By default, the logical drive size is set to all available space in the array(s) being
associated with the current logical drive, thus accounting for the Span setting and for
partially used array space. For example, if the previous logical drive used only a part of
the space in an array, the current logical drive size is set to the remaining space by
default.
9. Select Advanced from the bottom window of the logical drive configuration screen to set
the remaining options.