HP Raining DataCorp. mvEnterprise manual Special Considerations for 4mm DAT Units

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5.Select these options as indicated the following screen:

￿￿BLOCK SIZE (0=variable length). Type 0.

￿￿Use DEVICE BUFFERS during writes. Type yes.

￿￿Use data COMPRESSION. See the “Special Considerations for 4mm DAT Units” section following for information on selecting the compression option.

2.2.1 Special Considerations for 4mm DAT Units

For 4mm DAT drives, compression needs to be correctly specified. Newer devices support data compression, allowing them to write between 2-3 times the normal quantity of data on the tape, while at the same time reducing the time taken to read and write tapes. Normally, this feature should be turned on. However, if you are writing tapes to be read by other 4mm DAT units that cannot handle compressed data, you need to turn data compression off.

2.2.2 Special Considerations for Quarter-Inch Cartridge Tape Units

Tape density and block size are of particular importance when using quarter-inch tape units. Density setting 34 selects QIC 2.5GB mode of operation (COMPRESSION = NO), further selecting COMPRESSION = YES in this mode selects QIC 5.0GB mode, 21 selects QIC1000 mode, 17 selects QIC525 mode, 16 selects QIC150 mode, and 15 selects QIC120 mode.

In all cases you must set the tape BLOCK size to 512.

Depending upon the model of the tape drive installed in your system and the specification of the tape cartridge used, some of the above settings may not be applicable or allowable. Tape units automatically read tapes created at any of the applicable densities, and write them at either of the

mvEnterprise Release 4.1 on AIX

Installation Guide

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Contents Raining Data Corporation MvEnterprise Release 4.1.0 on AIXPage Table of Contents MvEnterprise Release 4.1 on AIX Installation Guide Installation Overview Installation InstructionsBold Notation ConventionsNotation Explanation Alternate fontAdditional Documentation Assembly Language Manual Part NumberMvEnterprise Pick License Management All licensed ports are in use Before You Install Usr/config Usr/stat Tar -xvpf tapedevicename Installation InstructionsMkdir production Cd /productionInstall -o -m Prompt Response MvEnterprise Release 4.1 on AIX Installation Guide Cp -p pickoda prodpick AbsrestoreFilerestore Mv prodpick prodpick.regSYSTEM-UPGRADE Enter number of phantoms for restore, CR for noneMvEnterprise Release 4.1 on AIX Installation Guide Account File Upgrade File ListingHow many mvEnterprise terminals? MvEnterprise Install ProgramEnter the name to be used for the mvEnterprise program? Enter initial data base names When done, type endSupport Scripts Cshrc Login AbsKillpick Mmailaddr Installation Options#prodpick -istacked.data MvEnterprise Monitor ProgramInput flow control only Flow y -X-on/off flow control defaultNo flow control passed to program as DataMvEnterprise Release 4.1 on AIX Installation Guide Prodpick Current VFS = 36 Map = 1 Sequence = Adjusted lines =Current VFS = 48 Map = 1 Sequence = Adjusted lines = Set the coldstart flag. Implied by options -a, or -f MvEnterprise Disk Flushing Program MvEnterprise Release 4.1 on AIX Installation Guide MvEnterprise Release 4.1 on AIX Installation Guide Prodpick -l0 -e Extending Disk SpaceUsers PhantomsProdpick -l0 Select Add Print Queue MvEnterprise Line Printer Driver ProgramMvEnterprise Release 4.1 on AIX Installation Guide MvEnterprise Release 4.1 on AIX Installation Guide MvEnterprise Release 4.1 on AIX Installation Guide Select Default Print Job Attributes Select Change/Show Printer CharacteristicsProdpick.lpd prodpick.lj3pcl.99 lj3pcl 10 -r & where Prodpick.lj3pcl.99Startptr 0,0,0,S99 Prodpick -l99 -oh -t/dev/prodpick.lj3pcl.99Startptr Getting Started Configure the System for mvEnterprise on AIXSet -o Set -o emacsConfigure Tape Devices for mvEnterprise on AIX Select Tape Drive. The Tape Drive screen displays Special Considerations for Quarter-Inch Cartridge Tape Units Special Considerations for 4mm DAT UnitsMvEnterprise Release 4.1 on AIX Installation Guide Dev/rmt1.1 Further Configuration Information For All Tape DevicesUpdate the config.tape file Configure Disks for mvEnterprise on AIX Volume Group name. Type mvevg00 MvEnterprise Release 4.1 on AIX Installation Guide Create a Logical Volume to Store mvEnterprise Data Select key Page Select File Systems. The File Systems menu displays Create a File System to Store mvEnterprise DataSelect Mount Automatically at system restart?, then type yes Mounting the File System Mvefs/mvelv00/DB0 Mvefs/mvelv02/DB1 end Create a Database to Store mvEnterprise DataEnter How many frames in this data space5000 minimum? Xtiso Tcp Dev/xti/tcp Configure the System to use EthertapeUpdate the System to use Ethertape Vi /etc/pse.confUpdate the /etc/hosts File Etc/hosts IndexMD-UPGRADE Utility