- Notes, cautions, and warnings
- About the Shared PERC 8 card
- Shared PERC
8 card features
- Physical disk power management
- Consistency Checks
- Virtual disk initialization
- Physical disk roaming
- FastPath
- Virtual disk migration
- Virtual disk cache policies
- Physical disk write cache policy
- Fault tolerance
- Multipath support
- Deploying the Shared PERC 8 card
- Firmware and
driver installation
- Downloading drivers and firmware for Shared PERC 8 from the Dell support website for all operating systems
- Downloading drivers from the Dell Systems Service and Diagnostic Tools media for Windows
- Installing or updating Windows drivers for Shared PERC 8
- Installing or updating Linux drivers for Shared PERC 8
- Installing or updating VMware drivers for Shared PERC 8
- Firmware installation or update
- Multipath and clustering setup
- Management applications for Shared PERC 8 card
- Security key and RAID management
- Troubleshooting
- General issues
- Shared PERC 8 card not seen in Device Manager
- Critical errors or disk warning messages seen in the Windows Event log
- Shared PERC 8 cards fail to function
- Fatal error or data corruption reported
- EMM failure message seen after EMM firmware update
- Erratic drive LED behavior after EMM Firmware update
- Performance variations between write-back and write-through cache modes
- Physical disk
issues
- Physical disk in failed state
- Capable speed of a drive being shown as blank
- Physical disk displayed as Blocked by management application
- Multiple disks become inaccessible
- Rebuilding a Failed physical disk
- Foreign dedicated hot spare shown as global hot spare in CMC’s foreign configuration preview before foreign configuration import
- Physical disk takes a long time to rebuild
- SMART Errors
- Auto Replacement Member errors
- Virtual disks issues
- Driver issues
- Controller issues
- Hard drive indicator codes
- General issues
- Getting help
Dell Shared PowerEdge RAID Controller 8 Cards For Dell PowerEdge VRTX Systems User’s Guide
Patrol Read
The Patrol Read feature is designed as a preventive measure to ensure physical disk health and data integrity. Patrol Read scans for and resolves potential problems on configured physical disks. The Dell Chassis Management Controller (CMC) can be used to start and control the features of Patrol Read.
The following is an overview
of
Patrol Read:
- Patrol Read runs on all disks on the controller that are configured as part of a virtual disk, including hot spares.
- Patrol Read does not run on physical disks that are not part of a virtual disk or are in Ready state.
- Patrol Read adjusts the amount of controller resources dedicated to Patrol Read operations based on outstanding disk I/O. For example, if the system is busy processing I/O operation, then Patrol Read uses fewer resources to allow the I/O to take a higher priority.
-
Patrol Read does not run on
disks involved in any of the following operations:
- Rebuild
- Replace Member
- Full or Background Initialization
- Consistency Check (CC)
- NOTE: By default, Patrol Read automatically runs every seven days on configured SAS hard drives. Patrol Read is not necessary on SSD and is disabled by default.
- NOTE: In the event of a controller failover in systems with Fault Tolerant Shared PERC 8 card configuration, Patrol Read does not continue on the active controller. You must start Patrol Read again through CMC. If you do not start Patrol Read, it automatically starts on the active controller within seven days of the failover.
For more information on Patrol Read, see the Dell Chassis Management Controller for PowerEdge VRTX Online Help .
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