Subject：When attempting to expire a media in Veritas NetBackup (tm) 6.0 with the bpexpdate command, the message "requested media id was not found in the EMM database" is received
Reference：https://www.veritas.com/support/en_US/article.TECH44823
1. 使用nbemmcmd列出media的詳細信息主要是Master Server信息
[root@nhpabk01 admincmd]# nbemmcmd -listmedia -mediaid DD1083
NBEMMCMD, Version:6.5.6
====================================================================
Media GUID: a28ad432-f215-11e5-8000-fcf2c0fe6d67
Media ID: DD1083
Partner: -
Media Type: HCART2
Volume Group: 000_00002_TLD
Application: Netbackup
Media Flags: 1
Description: Added by Media Manager
Barcode: DD1083
Partner Barcode: --------
Last Write Host: nhpabk01
Created: 03/24/2016 15:10
Time Assigned: 04/07/2016 08:18
First Mount: 03/25/2016 02:03
Last Mount: 04/10/2016 19:54
Volume Expiration: -
Data Expiration: 04/17/2016 19:54
Last Written: 04/10/2016 19:54
Last Read: -
Robot Type: TLD
Robot Control Host: nhpabk01
Robot Number: 2
Slot: 83
Side/Face: -
Cleanings Remaining: -
Number of Mounts: 30
Maximum Mounts Allowed: 0
Media Status: ACTIVE
Kilobytes: 326461728
Images: 79
Valid Images: 79
Retention Period: 0
Number of Restores: 0
Optical Header Size Bytes: 1024
Optical Sector Size Bytes: 0
Optical Partition Size Bytes: 0
Last Header Offset: 5101164
Adamm Guid: 00000000-0000-0000-0000-000000000000
Rsm Guid: 00000000-0000-0000-0000-000000000000
Origin Host: NONE
Master Host: nhpabk01
Server Group: NO_SHARING_GROUP
Upgrade Conflicts Flag:
Pool Number: 4
Volume Pool: EMCDD2200
Previous Pool Name: -
Vault Flags: -
Vault Container: -
Vault Name: -
Vault Slot: -
Session ID: -
Date Vaulted: -
Return Date: -
====================================================================
Command completed successfully.
2.查看有沒有media ID在merge表里，如果有，不要再做操作，聯繫NBU處理；如果沒有，就繼續
[root@nhpabk01 admincmd]# nbemmcmd -listmedia -mergetable
NBEMMCMD, Version:6.5.6
The following number of records were found:0
Command completed successfully.
3.確定了沒有media在merge table里，就看看media ID是否有image
有的話就會列出IMAGE和FRAG行（這裡就是那些還沒有過期的media），沒有的話就不會輸出什麼（這裡就是那些已經過期或者沒有assigned的media）
[root@nhpabk01 admincmd]# bpimmedia -mediaid DD1084
IMAGE NHMIX01 8 NHMIX01_1465888536 NHCMO_FA_LUN_nhmix01_ORALOG_BL_H_D 4 Default-Application-Backup 2 11 1 1466147736 0 0
FRAG 1 1 256544 0 2 14 104 DD1084 nhpabk01 65536 5960601 1465614545 11 0 *NULL* 1466147736 0 11 1 *NULL*
[root@nhpabk01 admincmd]# bpimmedia -mediaid DD1083
no entity was found
4.只要media ID沒有出現在merge table，就能夠使用bptm命令來為受影響的media ID建立一個完整的media記錄（這裡說的是上面master Server不存在的情況，不存在主要是一些，通過該命令來讓media ID的master Server呈現出來），只要有了完整的信息，Media ID就能夠使之expired和unsigned.
bptm命令需要知道Media ID，density，volumn pool number三個參數
[root@nhpabk01 admincmd]# bptm -makedbentry -m DD1083 -den hcart2 -poolnum 4
bptm: media db entry for DD1083 already exists, aborting
Error - media manager - system error occurred
我這裡是該media ID已經存在db entry里了
5. 接下來就可以用bpexpdate來過期media
bpexpdate –m DD1083 –d 0