Exchange DAG seeding operation fails with I/O error

ua flag

we are getting below error on some of our database wheh we try to create/update a database copy:

The seeding operation failed. Error: An error occurred while performing the seed operation. Error: An error occurred while processing a request on server 'EX1-Server'. Error: An I/O error occurred while attempting to access file 'D:\Exchange\DAGMBDB01\Database\DAGMBDB01.edb' on source server EX1-SERVER. Error: EseDatabaseBackupReader: PerformDatabaseRead failed with error code 0xFFFFFC06. Expected 1048576 bytes read, but actually only 0 were read.

The disk are brand new ssd so it cant be a disk issue. Any suggestion?

joeqwerty avatar
cv flag
**The disk are brand new ssd so it cant be a disk issue** - How did you confirm that? Also, do you have the appropriate AV exclusions configured for Exchange?
ua flag
Because we replaced the disk after we started getting the error. Getting same error on new disk. We have AV exclusion also tried removing AV completely.
Jayce avatar
au flag
How many copies for this database? Did other copy in other disk work normally?
ua flag
One active one passive. Active working fine just passive copy causing issue.
us flag

Try following steps to fix the issue:

Stop Microsoft Exchange Search service. then try to remove the copy completely and then again re-add, now restart Exchange Search service. it will fix the issue.

If it will not fix the issue then check no other seeding or incremental reseeding operations is not running for this database, and then Perform Following steps To Rebuild or Reseed the Search Catalog:-

  1. Seed database copy without seeding the content index catalog

    Update-MailboxDatabaseCopy -Identity DB\MBX -DatabaseOnly

  2. Seed the content index catalog for database copy without seeding the database file

    Update-MailboxDatabaseCopy -Identity DB\MBX -CatalogOnly

  3. Run Following Script to Reset Index.

    ResetSearchIndex.ps1 script

Now Check Exchange Database Copy Seed Status.

Also check this link to Monitor database availability groups.


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