请教：NBU master server连接两个磁带库，配置ovpass的问题

xjhns

现在一台ibm p630机器通过光纤交换机分别与两台磁带库相连，也就是要操作两个机械手。
请问在这种情况下，配置机械手的ovpass有什么特殊之处？请大家给些建议、提示、注意。

maping

可以先试试。
在legato上我是做过的。关于NBU没有做过。
感觉没有什么区别。

xjhns

配置第二个机械手的ovpass是否对下面命令的lun值修改即可：
"mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,lun"
假如第一个带机lun是1，那么“mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,1”
假如第二个带机lun是2，那么“mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,2”
请问：我上述的想法符号系统机制吗？

假如有两块HBA卡，两个带机，那么是否就是四个ovpass了：ovpass0,ovpass1,ovpass2,ovpass3?

maping

原帖由 xjhns 于 2005-11-11 23:10 发表
配置第二个机械手的ovpass是否对下面命令的lun值修改即可：
"mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,lun"
假如第一个带机lun是1，那么“mkdev -c media_changer -s fcp -t  ...

上面说的没有错，配置两个机械手需要区分scsi_id，lun，fscsi



下面说的错了，两个机械手就两个ovpass设备文件

xjhns

上面说错了，是两块HBA卡，两个机械手，因此我理解是四个ovpass:
“mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,1”
”mkdev -c media_changer -s fcp -t ovpass -p fscisi0 -w scsi_id,2”

“mkdev -c media_changer -s fcp -t ovpass -p fscisi1 -w scsi_id,1”
”mkdev -c media_changer -s fcp -t ovpass -p fscisi1 -w scsi_id,2”

[ 本帖最后由 xjhns 于 2005-11-11 23:54 编辑 ]

maping

不懂！
我懂晕死了。。。。。。。。。。。。。。。。。。。。。

zyl19861126

回复 5# xjhns


我也正有此疑问，请问LZ解决了问题了。是4个ovpass么？ 我的理解就是有4个ovpass，然后配置多路径冗余吧？ 是么。

fastester

回复 7# zyl19861126


2个ovpass足够。多路径是通过robtest去设置的。这方法实际使用中很少用。

How to configure multiple paths for robots

    NetBackup 6.5.2 is the first release to smultiple paths for robots or tape libraries. This enhancement is implemented in a much more subtle way when compared to tape drives to ensure that robotic operatiocontinue in a quick and efficient mannerwithout user intervention.

   After you configure storage devices (Symantec recommends that you use the “Configure Storage Devices” wizard), only the first path detected to the robot will be stored in the Enterprise Media Manager database. The GUI and CLI commands that report path information will only display the first path that was discovered.

   If other paths to the TLD robot exist, you can configure them as alternative paths by enabling multiple path support in NetBackup. Use the NetBackup robtest utility to enable and manage multiple path support for TLD robots (instructions follow).

    You can see and manage the extra paths to TLD robots only by using the robtest utility. It is important to note that the primary path will always be used before trying the alternative paths. There is no concept of downing a path to avoiding using it as can be done for tape drive multipathing. If all paths fail and the robot is marked as down, in multiple path automatic mode NetBackup will regularly scan for the robot until it again becomes available. (Automatic mode is the default.) If using multiple path manual mode, NetBackup will regularly attempt to access the robot through all the paths configured in the multipath configuration.

To enable multiple paths for TLD robots
1. Start the robtest utility:
UNIX: /usr/openv/volmgr/bin/robtest
Windows: install_path\Volmgr\bin\robtest.exe

2. Select the TLD robot for which you want to enable multiple paths.

3. At the Enter tld commands (? returns help information) prompt, enter the following command:
multipath enable

    When the multipath feature is enabled, it defaults to running in automatic mode. The automatic mode automatically scans for all paths for each TLD robot at each tldcd daemon startup, requiring no additional setup.

To add paths manually
1. If you prefer to add paths manually rather than add them automatically, in robtest enter the following command:
multipath manual

2. Then, add each individual path one at a time by issuing the command
multipath add <pathname>

To return to automatic mode
Issue the following command in robtest:
multipath auto
All of the paths will be scanned and added after the next tldcd restart.

To remove a path

Issue the following command in the robtest utility:
multipath remove <pathname>

To view the currently stored paths
Issue the following command in the robtest utility:
multipath showpaths

When in automatic mode, showpaths will not show any paths until tldcd has been restarted and allowed to scan for the paths.

To disable multiple paths for TLD robots
Issue the following command in the robtest utility:
multipath disable