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Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
With RAID level-10, 1E0, and 50, if one of the physical drives fails in a sub-logical
drive, the ServeRAID controller switches read and write requests to the remaining
functional drives in the sub-logical drive. With RAID level-00, a physical drive failure
within the sub-logical drive results in loss of data.
Drive state descriptions
This section provides descriptions of the physical and logical drive states.
Physical drive state descriptions:
The following table provides descriptions of the
valid physical drive states.
Then, create a logical drive within the spanned array (1). The data is striped across this
logical drive, creating blocks. Notice that none of these blocks are redundant. This is
because the logical drive (1) is RAID level-0 in a RAID level-x0 implementation (see the
following table).
RAID level
means the sub-logical drive is
and the spanned array logical drive is
00
RAID level-0
RAID level-0
10
RAID level-1
RAID level-0
1E0
RAID level-1E
RAID level-0
50
RAID level-5
RAID level-0
Drive State
Meaning
Defunct
A physical drive in the online, hot-spare, or rebuild state has become defunct. It does
not respond to commands, which means that the ServeRAID controller cannot
communicate properly with the drive.
If a physical drive has become defunct, refer to “Drive replacement (rebuilding a
defunct drive)” on page 184.
Hot spare
A hot-spare drive is a physical drive that is defined for automatic use when a similar
drive fails.
Online
The drive is online. It is functioning properly and is part of an array.
Rebuilding
The drive is being rebuilt.
For more information on rebuilding a drive, refer to “Drive replacement (rebuilding a
defunct drive)” on page 184.
Ready
The ServeRAID controller recognizes a ready drive as being available for definition.
A
A
B
C
1
1
2
3
4
5
7
6
8
1
2
3
4
5
7
6
8
1
2
3
4
5
7
6
8
1
2
3
4
5
7
6
8
1
2
3
4
5
7
6
8
1
2
3
4
5
7
6
8
11
A
1
1
2
3
5
4
7
10
8
11
6
9
12
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