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if there are error from dbcc checkdb , what are the differences between allocation error and consistency error ?
In practice none. They are both errors that requires the database to be repaired, if possible, or restored from a clean backup. Originally, before SQL 7 or so, CHECKALLOC was a separate command.
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Hi sakuraime,
Please check this thread which might help:
allocation errors have to do with errors in the way that pages are linked to objects, consistency errors have to do with the structure of a page.
Best Regards,
Amelia
allocation errors have to do with errors in the way that pages are linked to objects <<< So the page disconnected from the table ? However the page is consistence ??
consistency errors have to do with the structure of a page. << this could be more easy to understand , like checksum error, corrupt page, index in consistency ....