Microsemi Adaptec ASR-8405E - Disk Drive Failure in a RAID 0 Array; Multiple Failures in the same Array; Failed SSD in Maxcache Device; Resetting the Controller

11.4.4 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).
11.4.5 Multiple Failures in the Same Array
Except in RAID 6 and RAID 60 arrays (see Understanding RAID), 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, ARC (see About the Microsemi Adaptec RAID
Conguration Utilityconcept), the command-line utility, ARCCONF, or maxView Storage Manager. For more
information, refer to the Microsemi Adaptec RAID Controller Command Line Interface User’s Guide and
maxView 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.
11.4.6 Failed SSD in maxCache Device
Because the maxCache Device is a redundant logical device, comprised of SSDs only, it is rebuilt automatically
when a failed SSD is replaced, just like an ordinary array. Once you identify the failed SSD, for example, by
using maxView Storage Manager's rapid fault isolation feature, replace it with a new one (see Connecting
Solid State Drives (SSDs) maxCache Solid State Drive installinginstallation solid state drivesSolid State Drive
(SSD) installing). The controller detects the new SSD and begins rebuilding the maxCache Device.
11.5 Resetting the Controller
You may need to reset, or ash, your Microsemi Adaptec RAID controller if it becomes inoperable or if a
rmware upgrade is unsuccessful. Microsemi Adaptec RAID controllers support a reset protocol called HDA
mode ash. For information about HDA mode, see the Readme or contact your support representative. To
locate the ash jumper on your RAID controller board, see the illustrations in About Your RAID
Controllercontrollers gurescontrollers descriptions.
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Solving Problems