Low LTO5 Tape Usage
In last nights ejection, I had:
828gb on one tape
587gb on one tape
I have seen some tape ejections put as much as 2.7tb on a tape for monthly vaults, or 1.1tb on a daily.
Backup virtual servers (on ESX 4.1), Windows and Exchange to a Data Domain VTL
Backups occur 4-10am for Virtual servers.
Other backups occur 10pm-12am, 2am-5am, 6am-10am.
The Vault starts at 3:30am and continues through 10am.
I have 4 volume pools for the tapes: 2 for differentials, 2 for full-backups.
(There are 2 offsite locations tapes are sent to).
The properties of these pools have the following setting, "Maximum number of partially full media: 1"
NetBackup v126.96.36.199 running on Windows 2008-R2
LTO 5 tapes; 1.5tb native, 3.0tb compressed
What process is NetBackup using to get a new tape; when it should be putting upto 2.9tb on each tape?