ADR technical resources

Start with the failed system, the visible symptom, or the business data you cannot access.

These resources help administrators distinguish a routine storage warning from a recovery condition, preserve the evidence that matters, and reach the appropriate RAID, server, NAS, virtualization, database, or industry-specific path.

Open RAID triage Choose a failure symptom

If required business data is already inaccessible, stop rebuilds, imports, initialization, forced-online actions, and repair attempts until the current state is documented.

Condition firstName what the system shows

Boundary statedKnow when administration becomes recovery

Sources protectedPreserve members and alternate copies

Next path clearTechnical guidance or technician review

Core recovery paths

Choose the layer that is preventing access to the data.

A controller message, failed host, missing datastore, offline NAS pool, and unusable database require different evidence and different stopping points.

RAIDOffline, degraded, missing, or failed arraysRecovery services and the controlled member-access method.Review RAID recovery → ServerThe host will not boot or present required storageSeparate recovery of business data from repair of the failed server.Review server recovery → NASPool, volume, shares, or files are unavailableQNAP, Synology, TrueNAS, and other multi-disk storage paths.Review NAS recovery → VirtualizationDatastore, VMDK, snapshot chain, or VM failureProtect the backing storage and complete virtual-machine state.Review virtualization recovery → DatabaseRecovered storage did not return usable recordsSQL, application-database, data-file, log, attach, and recovery paths.Review database recovery → Physical mediaA member cannot be imaged safely in its present conditionControlled laboratory evaluation and selective physical escalation.Review in-lab recovery →

Failure recognition and technical guidance

Use the system evidence before choosing an intervention.

These hubs organize controller states, RAID levels, compound arrays, and technical explanations without treating every informational question as a recovery case.

Controller and system triageDell PERC, HPE Smart Array, LSI MegaRAID, QNAP, Synology, and TrueNASBegin with the exact controller or platform state.Open controller triage → Controller technical noteHow RAID controllers interpret member and configuration stateMetadata, foreign configurations, missing virtual disks, and member identity.Read the controller note → RAID 5Single-parity failure and rebuild pathsTwo-member loss, missing virtual disks, rebuild failures, and parity uncertainty.Open RAID 5 triage → RAID 6Dual-parity failure and intervention pathsMultiple failures, degraded operation, rebuild behavior, and conflicting states.Open RAID 6 triage → RAID 50Lower-group failure within a striped compound arrayReconstruct each RAID 5 group before validating the upper stripe.Open RAID 50 triage → RAID 60Lower-group failure within a dual-parity compound arrayEvaluate each RAID 6 group and the stripe joining them.Open RAID 60 triage →

Context, proof, and controlled self-diagnosis

Understand the operating model and the evidence behind it.

ADR recovery methodBegin without booting the failed server or bringing the array onlineStop, identify, connect independently, protect, reconstruct, and verify.See how ADR begins → Historical client accountsRead what failed, what was at risk, and what happened nextDirect client correspondence and archived recommendations; results vary by case.Read client recovery stories → JeannieLiteRead-only RAID diagnostic guidance for administratorsUse the diagnostic tool to identify certain RAID conditions—not to write to or recover the failed array.Review JeannieLite → Open data accessADR feeds for search, AI, and structured discoveryReview the public machine-readable access points provided by ADR.Open ADR data feeds →

Required business data is inaccessible?

Tell ADR what failed and what has already been attempted.

The failed server does not need to boot, the volume does not need to mount, and the failed array does not need to be brought online before an ADR technician reviews the next safe step.

Call 1-800-228-8800 Start emergency triage