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Path failover is required when more than one physical or logical path exists between VTS and
external disk storage, such as an MSA or HP StorageWorks Enterprise Virtual Array (EVA). (For
the EVA, a path failover connection is required through two ports on the VTS server to two ports
on the EVA.) If a path fails, another path becomes active and handles I/O for the LUNs on the
failed path. Only one path is active at a time for a LUN. You can run the multipath -v2 -ll
command to see a list of known multi-pathed disks.
You can use the Device Mapper Multipath Enablement Kit to configure path failover. The dm-
multipath and devicemapper RPMs are installed by default on the VTS server. You must
download the latest version of the Device Mapper Multipath Enablement Kit; the kit contains a
multipath.conf file that can be used with VTS:
http://h20000.www2.hp.com/bizsupport/TechSupport/
SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3559652&prodTypeId=12169&prodSeriesId=3
559651&swLang=13&taskId=135&swEnvOID=4004
Then, download the latest version of the Device Mapper Multipath Enablement Kit for HP
StorageWorks Disk Arrays Release Notes document from this URL:
http://h20000.www2.hp.com/bizsupport/TechSupport/
DocumentIndex.jsp?lang=en&cc=us&prodClassId=-
1&contentType=SupportManual&prodTypeId=18964&prodSeriesId=3559651
Note
Review the "Device Mapper Multipath support matrix" section of these release notes to
ensure that the firmware version of your storage device supports multi-pathing. If
necessary, upgrade your storage device firmware.
Then, install and configure the device mapper tools as described in the following sections of the
release notes:
•
"Installing Device Mapper Multipath tools"
•
"Configuring Device Mapper Multipath to enable HP arrays"
•
"Setting up Device Mapper Multipath daemon"
9
Access the web interface
The VTS web interface enables you to configure and manage VTS. To access the web interface,
launch a web browser and enter the following in the address field:
https://ip_address
where ip_address is the management network interface address.
Or, if the Domain Name System (DNS) is configured on the network, enter the following:
https://hostname
where hostname is that of the VTS server.
When accessing the web interface from a browser on a remote system, the VTS web server will
redirect the browser to use a secure connection to the fully qualified domain name of the VTS
server. If problems arise, access the web interface from the local console; the browser is not
redirected in this case. Accessing the web interface from the local console may help you resolve
problems that may result from the redirection and use of certificates.
Virtual TapeServer Quick Setup Guide | 19
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