IBM 86655RY Hardware Maintenance Manual - Page 212

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). A 1 1 1 2 2 4 3 3 4 4 7 5 5 6 6 10 7 7 8 8 11 B 2 1 1 2 2 5 3 3 4 4 8 5 5 6 6 11 7 7 8 8 C 3 1 1 2 2 6 3 3 4 4 9 5 5 6 6 12 7 7 8 8 RAID level 00 10 1E0 50 means the sub-logical drive is RAID level-0 RAID level-1 RAID level-1E RAID level-5 and the spanned array logical drive is RAID level-0 RAID level-0 RAID level-0 RAID level-0 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. Drive State Defunct Hot spare Online Rebuilding Ready Meaning 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. A hot-spare drive is a physical drive that is defined for automatic use when a similar drive fails. The drive is online. It is functioning properly and is part of an array. The drive is being rebuilt. For more information on rebuilding a drive, refer to "Drive replacement (rebuilding a defunct drive)" on page 184. The ServeRAID controller recognizes a ready drive as being available for definition. 202 Hardware Maintenance Manual: Netfinity 7600 - Type 8665 Models 1RY, 2RY