User`s manual

AOC-USAS2-L8i/L8e Add-on Card User’s Manual
5-2
5-2 IS Features
Integrated Striping supports the following features:
• Support for volumes with two to ten disks
• Support for two Integrated Striping volumes with up to 14 drives total on a SAS2
controller.
• Support for combining one Integrated Striping volume and one Integrated Mirroring,
Integrated Mirroring + Striping, or Integrated Mirroring Enhanced volume on a single
controller.
• Support for both SAS and SATA drives, although the two types of drives cannot be
combined in one volume
• Fusion-MPT architecture
• Easy-to-use SAS BIOS configuration utility
• Error notification
• Disk write caching, which is enabled by default on all Integrated Striping volumes
• Use of metadata to store volume configuration on disks
• OS-specific event log
• Error display inside the Fusion-MPT BIOS
• SCSI Enclosure Services (SES) status LED support for drives used in Integrated
Striping volumes
5-3 IS Description
The IS feature writes data across multiple disks instead of onto one disk. This is
accomplished by partitioning each disk’s storage space into 64-KB stripes. These
stripes are interleaved round-robin, so that the combined storage space is composed
alternately of stripes from each disk.
For example, as shown in Figure 5-1, segment 1 is written to disk 1, segment 2 is written
to disk 2, segment 3 is written to disk 3, and so on. When the system reaches the end of
the disk list, it continues writing data at the next available segment of disk 1.