Is Features; Is Description - LSI SAS3442X-R User Manual

4.2

IS Features

4.3

IS Description

4-2
Integrated Striping supports the following features:
Support for volumes with two to ten disks
Support for two IS volumes (or one IS volume and one IM/IME
volume) on a controller, with up to 12 disks total. (Requires
Integrated RAID firmware v1.20.00 or above.)
Note: All physical disks in a volume must be connected to the
same SAS controller.
Presents a single virtual drive to the OS for each configured volume
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
Use of metadata to store volume configuration on disks
OS-specific event log
Error display inside the Fusion-MPT BIOS
SES status LED support for drives used in IS volumes
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
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.
Overview of Integrated Striping
Version 1.1 Copyright © 2006, 2007 by LSI Logic Corporation. All rights reserved.
Figure 4.1, segment 1 is written to disk 1,