Administrator Guide
Table Of Contents
- Dell EMC PowerVault ME4 Series Storage System Administrator’s Guide
- Contents
- Getting started
- New user setup
- Configure and provision a new storage system
- Using the PowerVault Manager interface
- System concepts
- About virtual and linear storage
- About disk groups
- About RAID levels
- About ADAPT
- About SSDs
- About SSD read cache
- About spares
- About pools
- About volumes and volume groups
- About volume cache options
- About thin provisioning
- About automated tiered storage
- About initiators, hosts, and host groups
- About volume mapping
- About operating with a single controller
- About snapshots
- About copying volumes
- About reconstruction
- About quick rebuild
- About performance statistics
- About firmware updates
- About managed logs
- About SupportAssist
- About CloudIQ
- About configuring DNS settings
- About replicating virtual volumes
- About the Full Disk Encryption feature
- About data protection with a single controller
- Working in the Home topic
- Guided setup
- Provisioning disk groups and pools
- Attaching hosts and volumes in the Host Setup wizard
- Overall system status
- Configuring system settings
- Managing scheduled tasks
- Working in the System topic
- Viewing system components
- Systems Settings panel
- Resetting host ports
- Rescanning disk channels
- Clearing disk metadata
- Updating firmware
- Changing FDE settings
- Configuring advanced settings
- Changing disk settings
- Changing system cache settings
- Configuring partner firmware update
- Configuring system utilities
- Using maintenance mode
- Restarting or shutting down controllers
- Working in the Hosts topic
- Working in the Pools topic
- Working in the Volumes topic
- Viewing volumes
- Creating a virtual volume
- Creating a linear volume
- Modifying a volume
- Copying a volume or snapshot
- Abort a volume copy
- Adding volumes to a volume group
- Removing volumes from a volume group
- Renaming a volume group
- Remove volume groups
- Rolling back a virtual volume
- Deleting volumes and snapshots
- Creating snapshots
- Resetting a snapshot
- Creating a replication set from the Volumes topic
- Initiating or scheduling a replication from the Volumes topic
- Manage replication schedules from the Volumes topic
- Working in the Mappings topic
- Working in the Replications topic
- About replicating virtual volumes in the Replications topic
- Replication prerequisites
- Replication process
- Creating a virtual pool for replication
- Setting up snapshot space management in the context of replication
- Replication and empty allocated pages
- Disaster recovery
- Accessing the data while keeping the replication set intact
- Accessing the data from the backup system as if it were the primary system
- Disaster recovery procedures
- Viewing replications
- Querying a peer connection
- Creating a peer connection
- Modifying a peer connection
- Deleting a peer connection
- Creating a replication set from the Replications topic
- Modifying a replication set
- Deleting a replication set
- Initiating or scheduling a replication from the Replications topic
- Stopping a replication
- Suspending a replication
- Resuming a replication
- Manage replication schedules from the Replications topic
- About replicating virtual volumes in the Replications topic
- Working in the Performance topic
- Working in the banner and footer
- Banner and footer overview
- Viewing system information
- Viewing certificate information
- Viewing connection information
- Viewing system date and time information
- Viewing user information
- Viewing health information
- Viewing event information
- Viewing capacity information
- Viewing host information
- Viewing tier information
- Viewing recent system activity
- Other management interfaces
- SNMP reference
- Using FTP and SFTP
- Using SMI-S
- Using SLP
- Administering a log-collection system
- Best practices
- System configuration limits
- Glossary of terms
● If after 60 seconds from being quarantined the disk group is QTCR or QTDN, the disk group is automatically dequarantined.
The inaccessible disks are marked as failed and the disk group status changes to critical (CRIT) or fault tolerant with a down
disk (FTDN). If the inaccessible disks later come online, they are marked as leftover (LEFTOVR).
● The dequarantine command is used to manually remove a disk group from quarantine. If the inaccessible disks later
come online, they are marked as leftover (LEFTOVR). If event 485 was logged, use the dequarantine command only as
specified by the recommended-action text to help prevent data corruption or loss.
A quarantined disk group can be fully recovered if the inaccessible disks are restored. Make sure that all disks are properly
seated, that no disks have been inadvertently removed, and that no cables have been unplugged. Sometimes not all disks in the
disk group power up. Check that all enclosures have restarted after a power failure. If these problems are found and then fixed,
the disk group recovers and no data is lost.
If the inaccessible disks cannot be restored (for example, they failed), and the disk group's status is FTDN or CRIT, and
compatible spares are available, reconstruction will automatically begin.
If a replacement disk (reconstruct target) is inaccessible at power up, the disk group becomes quarantined. When the disk is
found, the disk group is dequarantined and reconstruction starts. If reconstruction was in process, it continues where it left off.
NOTE: The only tasks allowed for a quarantined disk group are Dequarantine Disk Group and Remove Disk Groups. If you
delete a quarantined disk group and its inaccessible disks later come online, the disk group will reappear as quarantined or
offline and you must delete it again to clear those disks.
Remove a disk group from quarantine
If specified by the recommended action for event 172 or 485, you can remove a disk group from quarantine.
CAUTION:
To help prevent the loss of data, contact technical support before removing a disk group from
quarantine.
1. In the Pools topic, select the quarantined disk group.
2. Select Action > Dequarantine Disk Group.
The Dequarantine Disk Group panel opens.
3. Click OK.
Depending on the number of disks that remain active in the disk group, its health might change to Degraded (RAID 6 only)
and its status changes to FTOL, CRIT, or FTDN. For status descriptions, see Related Disk Groups table.
Working in the Pools topic
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