- 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
Performance variations between write-back and write-through cache modes
- Issue:
- Performance is highly variable across configurations, drive type, applications and IO workloads. The write performance of write-through mode is typically lower than that of write-back mode. Some configurations and workloads exhibit significant performance deltas.
- Corrective Action:
- Evaluate your needs for maximum I/O performance (a single Shared PERC 8 configuration) versus maximum data protection (a Fault Tolerant Shared PERC 8 configuration).
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