On the Netra 440 server, you can configure hardware disk mirroring using the on- board
■“To Create a Hardware Disk Mirror” on page 57
■“To Delete a Hardware Disk Mirror” on page 59
■“To Perform a Mirrored Disk
RAID 1 offers the highest level of data protection, but storage costs are high, and write performance compared to RAID 0 or RAID 5 is reduced since all data must be stored twice.
RAID 5: Disk Striping With Parity
RAID 5 is an implementation of disk striping in which parity information is included with each disk write. The advantage of this technique is that if any one disk in a RAID 5 array fails, all the information about the failed drive can be reconstructed from the data and parity on the remaining disks.
System performance using RAID 5 will fall between that of RAID 0 and RAID 1; however, RAID 5 provides limited data redundancy. If more than one disk fails, all data is lost.
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In a
Hardware Disk Mirroring
On the Netra 440 server, the
A hardware disk mirror created under the raidctl utility behaves slightly differently than one created using volume management software. Under a software mirror, each device has its own entry in the virtual device tree, and read/write operations are performed to both virtual devices. Under hardware disk mirroring,
