Chapter 10: Solving Problems ● 86If there are more disk drive failures than hot spares, see Failed Disk Drive Not Protected by a HotSpare.If copyback is enabled, data is moved back to its original location once the controller detectsthat the failed drive has been replaced.Disk Drive Failure in a RAID 0 ArrayBecause RAID 0 volumes do not include redundancy, if a disk drive fails in a RAID 0 array, thedata can’t be recovered.Correct the cause of the failure or replace the failed disk drives. Then, restore your data (ifavailable).Multiple Failures in the Same ArrayExcept in RAID 6 and RAID 60 arrays (see page 95), if more than one disk drive fails at thesame 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 thelogical 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 PoolBecause Solid State Drives (SSD) in the maxCache pool are used just for caching, notpermanent storage, no data recovery or rebuilding is necessary. Once you identify the failedSSD, for example, by using Adaptec Storage Manager’s rapid fault isolation feature, replace thefailed SSD with a new one (see page 52), then add the SSD to the maxCache pool following theinstructions on page 109 or by using Adaptec Storage Manager.Resetting the ControllerThis section explains how to reset, or Mode 0 flash, your Adaptec RAID controller. You maywant 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, seethe Readme on the installation DVD or contact your support representative. To locate the HDAmode jumper on Series 6 controller boards, see the illustrations in Chapter 3.To reset your Adaptec RAID controller:1 Download the firmware version currently installed on your controller fromwww.adaptec.com.2 Extract the down-loaded files to a folder on your local hard drive (for example,C:\Download\Drivers).
