SQL Server data recovery
A SQL Server database can become unavailable after storage failure, damaged RAID, missing files, an interrupted write, ransomware or an unsafe detach and copy. Data files, transaction logs and backups represent one recovery history.
Understand the symptom
Primary and secondary data files store database pages, while the transaction log records changes needed to roll committed work forward and incomplete work back. Backups and log backups add another restore sequence. A file that opens is not necessarily transactionally consistent. Storage-level recovery should preserve page data and log context before database repair, export or restore decisions are made on isolated copies.
What you may see
SQL Server cannot complete normal startup recovery using the available pages and log.
The data file may contain pages while transaction consistency and recent changes remain uncertain.
Underlying storage can return unreadable or corrupted pages even when files are present.
File versions, paths, permissions, checkpoints or storage consistency may not align.
Protect the source
Repair options that allow data loss may deallocate pages or remove structures to regain consistency.
Creating a new log can remove the path for rolling transactions to a consistent point.
A mistaken restore sequence can overwrite the only damaged but recoverable pages and logs.
Do this now
Quiesce SQL Server and dependent services before copying or imaging affected storage.
Keep MDF, NDF, LDF, backups, log backups, error logs, configuration and encryption certificates or keys.
Document full, bulk-logged or simple recovery, last good backup and failure timeline.
Identify critical tables, time point, applications and acceptable data-loss boundary.
NEPFOSYS process
RAID, volumes and files are acquired before database-level repair changes them.
File headers, checkpoints, LSN relationships, pages, logs and backups are compared on isolated copies.
A controlled attach, integrity checks, logical export or backup-based restore is selected according to the available state.
A clear next step
Start a case with the exact symptoms, incident timeline, prior attempts, encryption details, and the files that matter most. NEPFOSYS will route the case to the appropriate DFW intake or nationwide mail-in path.
Start with a case reviewQuestions, answered
Sometimes a database can be rebuilt or exported from data files, but consistency and recent transactions may be affected. Preserve every log, secondary file and backup before attempting it.
Not on the only copy. The option can remove damaged pages or structures to make the database consistent. Work from protected copies and understand the loss boundary first.
Not necessarily. Page checks, transaction consistency, representative queries, application behavior and critical tables still need validation.
DFW local · Nationwide mail-in