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Chapter 10: Solving Problems ● 66
Failed Disk Drive Protected by a Hot Spare
When an array is protected by a hot spare, if a disk drive in that array fails the hot spare is
automatically incorporated into the array and takes over for the failed drive.
To recover from the failure:
1 Remove and replace the failed disk drive (following manufacturer’s instructions).
2 If copyback is not enabled—In Adaptec Storage Manager, remove the ‘hot spare’
designation from the original hot spare (the disk drive that was built into the array). Then,
designate a new hot spare to protect the arrays on that controller.
If copyback is enabled—Data is automatically moved back to its original location once the
controller detects that the failed drive has been replaced. No action is required.
Failed Disk Drive Not Protected by a Hot Spare
When a array is not protected by a hot spare, if a disk drive in that array fails, remove and
replace the failed disk drive. The controller detects the new disk drive and begins to rebuild the
array.
If the controller fails to rebuild the array, check that the cables, disk drives, and controllers are
properly installed and connected. Then, if necessary, use Adaptec Storage Manager to rebuild
the array. For instructions, refer to the Adaptec Storage Manager User’s Guide
f
or Internal RAID
Storage or online Help.
Failure in Multiple Arrays Simultaneously
If there’s a disk drive failure in more than one array at the same time (one failure per array),
and the arrays have hot spares protecting them, the controller rebuilds the arrays with these
limitations:
● A hot spare must be of equal or greater size than the failed disk drive it’s replacing.
● Failed disk drives are replaced with hot spares in the order in which they failed. (The array
that includes the disk drive that failed first is rebuilt first, assuming an appropriate hot
spare is available—see bullet above.)
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).
- Installation and User’s Guide 1
- Copyright 2
- Trademarks 2
- Disclaimer 2
- Adaptec Customer Support 3
- Canadian Compliance Statement 5
- Contents 6
- Safety Information 10
- Technical Specifications 10
- About This Guide 11
- How to Find More Information 12
- Kit Contents and System 13
- Requirements 13
- Kit Contents 14
- About Your RAID Controller 15
- Array-level Features 16
- Adding Enhanced Features 17
- About the Adaptec 3085 18
- About the Adaptec 3405 19
- About the Adaptec 3805 20
- About the Adaptec 31205 21
- About the Adaptec 31605 22
- Mode 0 Flash connector 22
- About the Adaptec 4000 23
- About the Adaptec 4800SAS 24
- 256 MB also available 24
- About the Adaptec 4805SAS 25
- About the Adaptec 2420SA 26
- About the Adaptec 2820SA 27
- About the Adaptec 2130SLP 28
- About the Adaptec 2230SLP 29
- Getting Started 30
- Choosing a RAID Level 31
- Selecting Disk Drives 32
- Selecting Cables 33
- SATA Cables 34
- Installation Options 35
- Basic Installation Steps 35
- In this chapter 37
- Installing the Controller 38
- Connecting External Devices 42
- Creating a Bootable Array 43
- Setting the Boot Controller 44
- Creating an Array 44
- Making Your Array Bootable 47
- Installing the Driver and an 48
- Operating System 48
- Creating a Driver Disk 49
- Installing with Windows 50
- Installing with Red Hat Linux 50
- Installing with SUSE Linux 51
- Installing with NetWare 51
- Installing with OpenServer 52
- Installing with Solaris 52
- Installing with UnixWare 53
- Installing with VMware 53
- Installing with FreeBSD 54
- Installing on Windows 57
- Installing on NetWare 57
- Installing on OpenServer 58
- Installing on Solaris 58
- Installing on UnixWare 59
- Installing on VMware 59
- Installing on FreeBSD 60
- Managing Your Storage Space 61
- About Adaptec Storage Manager 62
- Which Utility Should I Use? 63
- Solving Problems 64
- Troubleshooting Checklist 65
- Silencing the Alarm 65
- Resetting the Controller 67
- ) Web site at www.scsita.org 68
- In this appendix 68
- What is SAS? 69
- What’s a Phy? 70
- What’s a SAS Port? 71
- What’s a SAS Address? 71
- What’s a SAS Connector? 71
- What do SAS Cables Look Like? 71
- Direct-attach Connections 72
- Backplane Connections 72
- SAS Expander Connections 73
- Understanding RAID 75
- Understanding Drive Segments 76
- Non-redundant Arrays (RAID 0) 76
- RAID 1 Arrays 77
- RAID 1 Enhanced Arrays 77
- RAID 10 Arrays 78
- RAID 5 Arrays 79
- RAID 5EE Arrays 80
- RAID 50 Arrays 81
- RAID 6 Arrays 82
- RAID 60 Arrays 82
- Selecting the Best RAID Level 83
- Using the Adaptec RAID 84
- Configuration Utility 84
- Running the ARC Utility 85
- Managing Existing Arrays 86
- Initializing Disk Drives 86
- Rescanning Disk Drives 86
- Secure Erasing Disk Drives 87
- Opening a -Select Utility 87
- Applying Changes and Exiting 87
- General Controller Settings 88
- Option Description 89
- Locating Disk Drives 91
- Identifying Disk Drives 91
- Viewing the Event Log 92
- Running the ACU Using Scripts 95
- About Record Mode 96
- Required 97
- ? Description 97
- HotspareDrives=0:0:0,0:1:0 98
- InitializeAll=Yes 98
- ACU exits with an error 99
- Keyword Description 100
- ACU Error Codes 101
- Sample Scripts 102
- System Requirements 105
- Before You Begin 105
- Running the Menu-based AFU 106
- Running the 107
- I2C Connector Reference 111
- Pin Number Signal Description 112
- 22-55-2161 114
- Pin Number 114
- SFF-8087 Connector J5: 125
- SFF-8087 Connector J18: 125
- SFF-8087 Connector J14: 125
- 22-552101 126
- SFF-8484 Connector J7: 128
- Electrostatic Discharge (ESD) 129
- Environmental Specifications 131
- DC Power Requirements 131
- Current Requirements 131
- Index ● 133 133
- Index ● 134 134
- Index ● 135 135
- Index ● 136 136
- Adaptec, Inc 137
- 691 South Milpitas Boulevard 137
- Milpitas, CA 95035 USA 137
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