Two RMAN errors during restore

1. "restore database from tag=TAG20080113T210205" got errors:

ORA-19870: error reading backup piece bk_a2j634ef_1_1_643928527
ORA-19507: failed to retrieve sequential file, handle="bk_a2j634ef_1_1_643928527", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Backup file not found in NetBackup catalog

Even "RMAN> list backup of database completed after 'sysdate - 16';" show the backuppiece (and the TAG) is in status "AVAILABLE ".

In this case, most likely the backup tape has been recycled. You may not have chance to restore the database from this backup set.

2. If you see below errors:

......
channel ch02: reading from backup piece pejdb4dd_1_1
ORA-19870: error reading backup piece pajdb2gd_1_1
ORA-19507: failed to retrieve sequential file, handle="pajdb2gd_1_1", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Failed to open backup file for restore.

ORA-19870: error reading backup piece ppjddfcb_1_1
ORA-19507: failed to retrieve sequential file, handle="ppjddfcb_1_1", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Failed to process backup file

Most likely RMAN can not locate the next tape. You need to make sure all tapes for the backup set are in the tape drive.