Asus RS724QA-E6 RS12 User Guide - Page 21
Integrated RAID Firmware, 2.4.1 Resynchronization with Concurrent Host I/O Operation
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Figure 2.3 Integrated Mirroring Enhanced with Three Disks Logical View Physical View Mirrored Stripe 1 Mirrored Stripe 2 Mirrored Stripe 3 Mirrored Stripe 4 Mirrored Stripe 5 Mirrored Stripe 6 Mirrored Stripe n Mirrored Stripe 1 Mirrored Stripe 2 Mirrored Stripe 3 Mirrored Stripe 3' Mirrored Stripe 1' Mirrored Stripe 2' Mirrored Stripe 4 Mirrored Stripe 5 Mirrored Stripe 6 Mirrored Stripe 6' + Mirrored Stripe 4' + Mirrored Stripe 5' Mirrored Stripe n-2 Mirrored Stripe n' Mirrored Stripe n-1 Mirrored Stripe (n-2)' Mirrored Stripe n Mirrored Stripe (n-1)' The LSI BIOS-based configuration utility enables you to create IM and IME volumes during initial setup and to reconfigure them in response to hardware failures or changes in the environment. 2.4 Integrated RAID Firmware This section describes features of the LSI Integrated RAID firmware. 2.4.1 Resynchronization with Concurrent Host I/O Operation The Integrated RAID firmware allows host I/Os to continue on an IM or IME volume while the volume is being re-synchronized in the background. Resynchronization is attempted after a hot spare is activated due to a physical device failure, or after a hot swap has occurred to a physical disk in the volume. 2.4.2 Metadata Support The firmware supports metadata, which describes the IM/IME logical drive configuration stored on each member disk. When the firmware is initialized, each member disk is queried to read the stored metadata in Integrated RAID Firmware 2-5 Version 1.1 Copyright © 2006, 2007 by LSI Logic Corporation. All rights reserved.