Adaptec 2805 User Manual and Install Guide - Page 87

Disk Drive Failure in a RAID 0 Array, Multiple Failures in the Same Array

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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: 1 Download the firmware version currently installed on your controller from www.adaptec.com. 2 Extract the down-loaded files to a folder on your local hard drive (for example, C:\Download\Drivers).

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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:
1
Download the firmware version currently installed on your controller from
www.adaptec.com.
2
Extract the down-loaded files to a folder on your local hard drive (for example,
C:\Download\Drivers).