升级步骤：
1. Before starting upgrading to NetBackup 7.5, run a Catalog Backup.
在开始升级到NetBackup7.5，运行目录库备份。
2. Symantec recommends that the consistency of the NetBackup EMM and BMR databases is validated and verified prior to performing the upgrade to NetBackup 7.5. https://www.doczj.com/doc/23818137.html,/docs/TECH126758
建议在执行升级到NetBackup7.5之前进行NetBackup EMM和BMR数据库的一致性验证和核实。
3. Upgrade to NetBackup 7.5 can occur from all NetBackup 6.x and NetBackup 7.x versions. OpsCenter should be updated first, followed by the NetBackup Master Server, then Media Servers, then Clients.
可以从所有的NetBackup6.x和NetBackup7.x版本升级到NetBackup7.5。应该首先更新OpsCenter，然后是NetBackup主服务器，介质服务器，最后升级客户端。
4. NetBackup 7.5 Maintenance Release 4 (7.
5.0.4) should be applied immediately after the 7.5 installation has been completed. NetBackup 7.5.0.4 download information can be found at the following link:
https://www.doczj.com/doc/23818137.html,/docs/TECH194138
7.5的升级安装完成后应立即安装NetBackup 7.5 Maintenance Release 4 (7.5.0.4)。
5. NetBackup 7.5 migrates the NetBackup catalog image header information into the Netbackup relational database. This is a multistep process that may impact installation and operational performance until complete. Please review the following PDF for more details: NetBackup_75_Upgrade_Guide.pdf
NetBackup7.5会迁移NetBackup catalog image header头信息到NetBackup关系数据库。这是一个多步骤的过程，可能会影响安装和运行性能，直到迁移完成。
6. With NetBackup
7.x, all Unix/Linux 32-bit support has been discontinued. Customers with 32-bit master servers can perform the following:
A. Move to a Netbackup Appliance!
B. Transfer a NetBackup master to new hardware/architecture should refer to: https://www.doczj.com/doc/23818137.html,/docs/TECH77448
NetBackup7.x中，不在支持所有的32位Unix / Linux。32位主服务器的客户可以执行以下操作：
A.迁移到NetBackup Appliance设备中
B. 转移NetBackup master到新的硬件
7. Upgrades from 6.x using OST on Unix Media Servers will be required to update the plug-in to a 64 bit version. For more information please refer to:
https://www.doczj.com/doc/23818137.html,/docs/TECH170276
Please Review the full list of known issues on:
7.5 Late Breaking News https://www.doczj.com/doc/23818137.html,/docs/TECH178334
从6.x UNIX介质服务器上使用OST的介质服务器升级将需要在64位版本更新插件。