Users Guide

USC and USC - LCE 57
NOTE: It is recommended that you have a good knowledge of RAID and your
hardware configuration to use the Advanced Wizard.
Click Next after making your selection.
Select Basic Settings
Select the RAID type for the virtual disk from the RAID Level drop-down menu:
• RAID 0 — Stripes data across the physical disks. RAID 0 does not
maintain redundant data. When a physical disk fails in a RAID 0 virtual
disk, there is no method for rebuilding the data. RAID 0 offers good read
and write performance with 0 data redundancy.
• RAID 1 — Mirrors or duplicates data from one physical disk to another.
If
a physical disk fails, data can be rebuilt using the data from the other
side of the mirror. RAID 1 offers good read performance and average write
performance with good data redundancy.
• RAID 5 — Stripes data across the physical disks, and uses parity
information to maintain redundant data. If a physical disk fails, the data
can be rebuilt using the parity information. RAID 5 offers good read
performance and slower write performance with good data redundancy.
• RAID 6 — Stripes data across the physical disks, and uses two sets of
parity information for additional data redundancy. If one or two physical
disks fail, the data can be rebuilt using the parity information. RAID 6
offers better data redundancy and read performance but slower write
performance with very good data redundancy.
• RAID 10 — Combines mirrored physical disks with data striping. If
a
physical disk fails, data can be rebuilt using the mirrored data. RAID 10
offers good read and write performance with good data redundancy.
• RAID 50 — A dual-level array that uses multiple RAID 5 sets in a single
array. A single physical disk failure can occur in each of the RAID 5 without
any loss of data on the entire array. Although the RAID 50 has increased
write performance, when a physical disk fails and reconstruction takes
place, performance decreases, data/program access is slower, and
transfer
speeds on the array are affected.
• RAID 60 — Combines the straight block level striping of RAID 0 with the
distributed double parity of RAID 6. Your system must have at least eight
physical disk to use RAID 60. Because RAID 60 is based on RAID 6,
two
physical disk from each of the RAID 6 sets could fail without loss
LC1_4.book Page 57 Friday, October 22, 2010 2:45 AM