User manual HP OPENVIEW STORAGE VIRTUAL REPLICATOR SOFTWARE COMPAQ SANWORKS VIRTUAL REPLICATOR V2.0 SYSTEM ADMIN GUIDE

[. . . ] Virtual Replicator Version 2. 0 System Administrator's Guide Third Edition (June 2000) Part Number: AA-RENKC-TE Compaq Computer Corporation Notice © 2000 Compaq Computer Corporation. Compaq, the Compaq logo, and StorageWorks Registered in United States Patent and Trademark Office and other jurisdictions. SANworks and the SANworks logo are trademarks or service marks of Compaq Information Technologies Group, L. P. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. [. . . ] You can either type the name or browse for it on the network. If the disk is being served by a cluster, you can type or select either the name of the cluster or the name of any computer in the cluster ­ the result is the same. The wizard displays a list of all the disks that are being served by the computer or cluster that you selected in the previous step. It tells you which are available and which are not available. Select the network disk to which you want to connect, then click Next. The wizard automatically maps a temporary drive letter to the network disk on the computer you are managing. This is the first available drive letter, starting from the beginning of the alphabet. 9­11 Compaq SANworks Virtual Replicator System Administrator's Guide On Windows NT 4. 0, you can use Disk Administrator to map a persistent drive letter. The following steps describe how to do this. Choose which drive letter you want to use. If possible, select a letter near the end of the alphabet. During system startup, drive letters are automatically allocated from the start of the alphabet. When the network disk software starts up, if the drive letter you chose has already been allocated to another disk that came online earlier in the startup sequence, the first available drive letter is allocated to the network disk. The network disk software starts late in the startup sequence, so select a letter near the end of the alphabet to reduce the probability that the drive letter is allocated to another disk. In a cluster, use the NDMgr or SnapMgr DRIVES command (Page C-2) to find out which drive letters are available on every node in the cluster. Use Disk Administrator to map the drive letter to the network disk and make it persistent. In Disk Administrator, select the network disk and deassign its current drive letter, even if it already has the same drive letter as the one you chose in Step 1. Now assign the drive letter you chose in Step 1 to the network disk. The drive letter is now persistent on the local computer. In a cluster, repeat Step 2 on every node in the cluster. Use Cluster Administrator to move the group that contains the SCE Connected Disk resource to each node, then run Disk Administrator on the node to map the drive letter and make it persistent. NOTE: You cannot make drive letters persistent on Windows 2000. Connecting to a Served Network Disk in a Cluster The Network Disk Connection wizard automatically creates a cluster group and a cluster resource in that group. Both the group and the resource have the name \\servername\netdiskname, where: s servername is the name of the standalone computer or cluster that is serving the disk s netdiskname is the name of the network disk The new resource is of type SCE Connected Disk. The wizard brings the new group and resource online. 9­12 Managing Network Disks Changing Settings The following sections describe how to change the IP subnet configuration and how to change the client system for a served network disk. Changing the IP Subnet Configuration When you install the network disk client software, the installation procedure automatically creates a default IP subnet configuration. [. . . ] To applications and users, a snapshot looks like a normal disk. You can read and write it like a normal disk. When you first create a snapshot, the snapshot takes up no disk space. It only starts to take up disk space when you modify the data stored on either the snapshot or the parent disk. Redundant Array of Inexpensive Disks (RAID) router SCSI segment segment size Small Computer System Interface (SCSI) snap-in snapshot Glossary­5 Compaq SANworks Virtual Replicator System Administrator's Guide Snapshot Manager A tool that you use to create and manage pools, virtual disks, and snapshots. [. . . ]