Chapter 10: Solving Problems 86

If there are more disk drive failures than hot spares, see Failed Disk Drive Not Protected by a Hot Spare.

If copyback is enabled, data is moved back to its original location once the controller detects that the failed drive has been replaced.

Disk Drive Failure in a RAID 0 Array

Because RAID 0 volumes do not include redundancy, if a disk drive fails in a RAID 0 array, the data can’t be recovered.

Correct the cause of the failure or replace the failed disk drives. Then, restore your data (if available).

Multiple Failures in the Same Array

Except in RAID 6 and RAID 60 arrays (see page 95), if more than one disk drive fails at the same time in the same array, the data normally can’t be recovered.

You may be able to recover the data by forcing the logical drive online or by recreating the logical drive without the initialization step. You can use the BIOS utility, ACU (see page 81), the command-line utility, ARCCONF, or Adaptec Storage Manager. For more information, refer to the Adaptec RAID Controller Command Line Interface User’s Guide and the Adaptec. Storage Manager User’s Guide.

Note: In some instances, RAID 10 and RAID 50 arrays may survive multiple disk drive failures, depending on which disk drives fail.

Failed Drive in maxCache Pool

Because Solid State Drives (SSD) in the maxCache pool are used just for caching, not permanent storage, no data recovery or rebuilding is necessary. Once you identify the failed SSD, for example, by using Adaptec Storage Manager’s rapid fault isolation feature, replace the failed SSD with a new one (see page 52), then add the SSD to the maxCache pool following the instructions on page 109 or by using Adaptec Storage Manager.

Resetting the Controller

This section explains how to reset, or Mode 0 flash, your Adaptec RAID controller. You may want to do this if the controller becomes inoperable, or if a firmware upgrade is unsuccessful.

Note: Mode 0 flash is supported on Adaptec Series 2 and Adaptec Series 5 controllers only. Adaptec Series 6 controllers support HDA mode flash. For information about HDA mode, see the Readme on the installation DVD or contact your support representative. To locate the HDA mode jumper on Series 6 controller boards, see the illustrations in Chapter 3.

To reset your Adaptec RAID controller:

1Download the firmware version currently installed on your controller from www.adaptec.com.

2Extract the down-loaded files to a folder on your local hard drive (for example, C:\Download\Drivers).

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Adaptec 2268300R manual Resetting the Controller, Disk Drive Failure in a RAID 0 Array, Multiple Failures in the Same Array

2268300R specifications

The Adaptec 2268300R is a robust and versatile RAID controller designed for enterprise-level storage needs. Ideal for environments demanding high availability, performance, and data protection, this controller provides organizations with the ability to manage large volumes of data while ensuring reliability.

One of the standout features of the Adaptec 2268300R is its support for various RAID levels, including RAID 0, 1, 5, 6, 10, 50, and 60. This flexibility allows users to choose the configuration that best suits their performance and redundancy requirements. By combining multiple drives into a single logical unit, the controller enhances data throughput and ensures data safety through redundancy.

The controller is built on a SATA and SAS architecture, allowing it to connect directly to both SATA and SAS drives. This broad compatibility is crucial for businesses looking to leverage existing hardware while also scaling their storage infrastructure. The Adaptec 2268300R is equipped with a powerful onboard processor that significantly boosts performance, driving down latency and increasing transaction speeds across connected drives.

Additionally, the Adaptec 2268300R features cache memory with a non-volatile option that enhances data integrity during unexpected power outages. This feature is essential for mission-critical applications where data loss can have severe repercussions. Moreover, the controller supports advanced caching algorithms, optimizing write and read performance to meet the demands of modern applications.

The controller also integrates seamlessly with Adaptec's management suite, providing users with a graphical interface to monitor and manage their storage solutions effectively. The web-based management tool allows administrators to configure RAID settings, monitor disk health, and perform troubleshooting, all from a centralized platform.

Security is another critical aspect of the Adaptec 2268300R. The controller comes equipped with encryption capabilities, enabling users to secure sensitive data at rest—protecting information from unauthorized access. Furthermore, with features like hot-spare drive support and automatic rebuilds, the controller assures continued operation even in the event of a disk failure.

In conclusion, the Adaptec 2268300R is a powerful RAID controller that delivers significant advantages in performance, flexibility, and reliability. With its support for multiple RAID levels, SAS and SATA compatibility, robust caching, and advanced management tools, it stands out as an ideal solution for businesses needing to safeguard and manage their vast data assets efficiently. Whether for enhancing data security or optimizing storage performance, the Adaptec 2268300R remains a sound choice in today’s data-driven landscape.