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l I/O
l Patrol Read
Recovering a physical disk bad block depends on the RAID level and state of the virtual disk. If a virtual disk is redundant, the controller can recover a bad
block on a physical disk. If a virtual disk is not redundant, then the physical disk bad block results in a virtual disk bad block.
The following table describes some of the possible scenarios that may/may not result in virtual disk bad blocks:
Table 10-2. Sample Scenarios For Virtual Disk Bad Blocks
Recommendations
Storage Management provides the ability to clear the bad block warnings. To clear bad blocks, the following procedure is recommended:
1. Perform a backup of the virtual disk with the Verify option selected.
One of the two following scenarios can occur:
¡ Backup operation fails on one or more files. In this case, restore the file from a previous backup. After restoring the file, proceed to step 2.
¡ Backup operation completes without error. This indicates that there are no bad blocks on the written portion of your virtual disk.
If you still receive bad block warnings, the bad blocks are in a non-data area. Proceed to Step 2.
2. Run Patrol Read and check the system event log to ensure that no new bad blocks are found.
If bad blocks still exist, proceed to step 3. If not, the condition is cleared without the need for step 3.
3. To clear these bad blocks, execute the Clear Virtual Disk Bad Blocks task.
This Clear Virtual Disk Bad Block feature is applicable only to PERC H700 and PERC H800 family of controllers.
Virtual Disk Properties and Tasks
Use this window to view information about the virtual disks and execute virtual disk tasks.
Virtual Disk Properties
The virtual disk properties can vary depending on the model of the controller. Virtual disk properties may include:
Table 10-3. Virtual Disk Properties
RAID Level
Virtual Disk
State
Scenario
Result
RAID 0
Degraded
One bad block on a
physical disk.
The controller cannot regenerate data from peer disks as there is no redundancy.
This results in a virtual disk bad block.
RAID 5
Ready
One bad block on a
physical disk.
The controller regenerates data from peer disks and sends a Write to the bad
block. The disk then re-maps the Logical Block Addressing (LBA) to another
physical location. The problem is resolved.
RAID 5
Degraded
One bad block on a
physical disk.
The controller cannot regenerate data from peer disks because one drive is
missing. This results in a virtual disk bad block.
RAID 5
Ready
One bad block on two
physical disks at the same
location.
The controller cannot regenerate data from peer disks. This results in a virtual disk
bad block.
RAID 6
Partially degraded (one
failed/missing physical disk)
One bad block on a
physical disk.
The controller regenerates data from peer disks and sends a Write to the bad
block. The disk then re-maps the LBA to another physical location. The problem is
resolved.
RAID 6
Degraded (two
failed/missing physical disk)
One bad block on a
physical disk.
The controller cannot regenerate data from peer disks. This results in a virtual disk
bad block
RAID 6
Ready
One bad block on a
physical disk.
The controller regenerates data from peer disks and sends a Write to the bad
block. The disk then re-maps the Logical Block Addressing (LBA) to another
physical location. The problem is resolved.
Property
Definition
Status
These icons represent the severity or health of the storage component.
- Notes and Cautions 1
- Supported Features 2
- Battery Tasks 10
- Connector Tasks 10
- Physical Disk Tasks 10
- Virtual Disk Tasks 10
- Virtual Disk Specifications 11
- Supported RAID Levels 11
- Enclosure Support 12
- Controller Tasks 13
- Permanently Degraded 26
- Rebuilding 27
- Physical Disks 30
- Other Disk Procedures 31
- Physical Disk Properties 32
- Remove Dead Segments 35
- Prepare to Remove 35
- Initialize 35
- Rebuild 35
- Cancel Rebuild 35
- Online and Offline 36
- Revertible Hot Spare 37
- Instant Encrypt Erase 38
- RAID Controller Batteries 39
- Battery Delay Learn Cycle 42
- BIOS Terminology 43
- Connectors 44
- Connector Health 45
- Connector Properties 46
- Back to Contents Page 48
- Controllers 49
- RAID Controller Features 50
- Read Policy 51
- Write Policy 51
- Cache Policy 51
- Disk Cache Policy 52
- Firmware/Driver Versions 54
- Controller Health 54
- Controller Components 55
- Controller Properties 55
- Available Reports 57
- Set Rebuild Rate 59
- Reset Configuration 60
- Export Log 61
- Set Check Consistency Rate 67
- Set Reconstruct Rate 67
- Set Patrol Read Mode 69
- Start and Stop Patrol Read 70
- Manage Physical Disk Power 72
- Manage Preserved Cache 72
- Manage Encryption Key 72
- Encryption Key 73
- Enabling LKM 73
- Patrol Read Report 74
- Check Consistency Report 74
- Slot Occupancy Report 75
- Manage CacheCade 76
- Resizing the CacheCade 77
- Renaming the CacheCade 77
- Deleting the CacheCade 77
- CacheCade Properties 77
- Enclosures and Backplanes 79
- SMART Thermal Shutdown 80
- Enclosure Management 81
- Enclosure Tasks 83
- Set Asset Data 85
- View Slot Occupancy Report 87
- EMM Properties 87
- Fan Properties 88
- Power Supply Properties 88
- Related information: 92
- Getting Started 93
- Displaying the Online Help 94
- Common Storage Tasks 94
- Understanding Hot Spares 96
- 4e/Si, and 4e/Di Controllers 98
- Required Conditions 100
- Moving the Disks 101
- Overview 102
- Supported Controllers 103
- Supported Enclosures 104
- Storage Health 105
- Select Report 105
- Storage Component Severity 105
- Alerts or Events 106
- Related Information: 107
- Storage Properties 109
- Global Tasks 109
- Storage Controllers 110
- Storage Components 111
- What Is RAID? 112
- Concatenation 113
- RAID Level 0 (Striping) 114
- RAID Level 1 (Mirroring) 115
- RAID 5 Characteristics: 116
- RAID 6 Characteristics: 117
- RAID 50 Characteristics: 117
- RAID 60 Characteristics: 118
- RAID 10 Characteristics: 119
- No-RAID 121
- Troubleshooting 122
- Replacing a Failed Disk 123
- A Rebuild Does Not Work 125
- Redundant Virtual Disks 126
- Virtual Disks 130
- SATA1.5/2s Controllers 131
- Creating Virtual Disks 132
- Expansion 133
- Controllers 134
- Recommendations 135
- Virtual Disk Properties 135
- Connector 0 144
- Physical Disks Selected 144
- Span Edit 145
- Considerations for Format 148
- Virtual Disk Task: Delete 149
- Virtual Disk Task: Rename 150
- Split Mirror 151
- Unmirror 151
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