<p>MySQL error 1548 occurs when the server cannot read a mysql system table, usually because the table files are missing or corrupted.</p>
<p>MySQL Error 1548: ER_OBSOLETE_CANNOT_LOAD_FROM_TABLE appears when the server fails to read a mysql.* metadata table due to corruption or missing files. Repair or restore the affected table, then restart MySQL to resolve the issue.</p>
Cannot load from mysql.%s. The table is probably
Error 1548 fires when MySQL tries to read a critical system table inside the mysql schema and fails. The message usually reads: "Cannot load from mysql.%s. The table is probably corrupted."
The server aborts the operation because metadata tables drive authentication, privileges, and configuration. Leaving the error unresolved can block logins, DDL, or even a full server start.
Table corruption is the primary trigger. Power loss, disk errors, or abrupt shutdowns can damage .frm, .ibd, or .MYD files inside the data directory.
An incomplete MySQL upgrade or downgrade may also leave system tables at mismatched versions, producing the same error when the server tries to read them on boot.
First, identify the exact table in the error log. Then back up the data directory before making any changes. Use mysqlcheck or the mysql_upgrade utility to attempt a logical repair.
If the table is InnoDB and cannot be repaired, restore it from a recent backup or recreate it with the mysql_system_tables.sql script that ships with your MySQL version.
Startup failure: The server refuses to start because mysql.user is corrupted. Boot with --skip-grant-tables, repair the table, flush privileges, and restart normally.
ALTER USER fails: Running privilege statements triggers the error on mysql.roles_mapping. Repair that table with mysqlcheck and re-run the command.
Enable the binary log and schedule regular full backups of the mysql schema so damaged tables can be restored quickly.
Use MySQL’s crash-safe settings: innodb_flush_log_at_trx_commit=1 and sync_binlog=1. Always stop MySQL gracefully before maintenance.
Error 145: Table '.MYD' is marked as crashed - Use REPAIR TABLE to recover MyISAM files.
Error 1030: Got error 28 from storage engine - Indicates disk space issues rather than corruption; free space to resolve.
Disk failures, power outages, or abrupt kills can corrupt mysql.* files, preventing the server from loading metadata.
Running mismatched server binaries against older data files leaves definitions inconsistent and unreadable.
Accidental chmod or chown on the data directory blocks MySQL from reading table files, triggering the error.
Occurs on MyISAM tables; often fixed with REPAIR TABLE.
Indicates out of disk space rather than corruption; free space or expand storage.
Arises when privilege tables are inconsistent; repairing mysql.user can resolve.
No. Leaving corrupted system tables risks privilege inconsistencies and future crashes. Repair immediately.
It disables authentication, so restrict network access or use a local socket during repairs, then re-enable grants quickly.
Yes. mysqldump the intact tables, drop the damaged ones, recreate with mysql_upgrade, and reload the data.
Galaxy surfaces server errors instantly in its SQL editor, encourages versioned backups of system queries, and provides quick links to repair guides, reducing downtime.
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