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Configuring and Running Virtual Machines
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append modes. You can change the disk mode setting on the Edit VM Configuration
page of the VMware Management Interface. The virtual machine must be powered
down before you change the disk mode. You can also make the changes directly in
the configuration file by including lines in the following format:
scsi0:2.mode = nonpersistent
or
scsi0:2.mode = undoable
If the mode of a disk image is nonpersistent, any changes to the disk are lost when the
associated virtual machine shuts down. If the mode of the disk image is undoable, the
changes are maintained in a separate file, known as the redo log, on the SCSI disk.
Each time the virtual machine is powered down, a dialog asks whether changes made
to the disk during the current session should be discarded, committed to the base
disk image or appended (kept in the redo log).
VMware ESX Server supports an additional append mode for disk images stored as
VMFS files. Like undoable mode, append mode maintains a redo log. However, in this
mode, no dialog appears when the virtual machine is powered off to ask whether you
want to commit changes. All changes are continually appended to the redo log. At
any point, you can undo all the changes by removing the redo log. Its name is derived
from the original name of the file that contains the disk by adding .REDO. Changes
can be committed permanently to the base disk image via the commit option of the
vmkfstools command. For details on this command, see Using vmkfstools on
page 199.
Virtual SCSI Disks on the Console Operating System
VMware ESX Server also supports virtual SCSI disks that are stored on the file system of
the console operating system. Virtual SCSI disks created under VMware Workstation
2.0 and higher are supported, although a new network driver needs to be loaded into
the guest operating system. Disks created under VMware GSX Server are also
supported. For details, see Migrating VMware Workstation and VMware GSX Server
Virtual Machines on page 71.
To create a new, blank virtual SCSI disk for your virtual machine, copy the file
/usr/lib/vmware/virt-scsi.dsk from the ESX Server installation CD-ROM
to the working directory for your virtual machine.
cp virt-scsi.dsk /virtual machines/vm1/virt-scsi.dsk
Then add lines to your virtual machine’s configuration file to describe the new disk.
Those lines have the following format:
- VMware ESX Server 1
- VMware, Inc 2
- 3145 Porter Drive 2
- Palo Alto, CA 94304 2
- Table of Contents 3
- Welcome to VMware ESX Server 13
- What’s New in Version 1.5 15
- System Requirements 17
- Legacy Devices 21
- Technical Support Resources 22
- Installing, Configuring and 25
- Upgrading ESX Server 25
- ESX Server 26
- Before You Begin 28
- Installing VMware ESX Server 28
- Your Server 33
- 7. Click Perform Action 54
- GSX Server Virtual Machines 71
- Preparing to Use the Remote 79
- Management Software 79
- Linux – RPM Installer 81
- Linux – Tar Installer 81
- Remote Console on page 114 82
- Workstation 84
- Using the VMware Management 94
- Interface 94
- Management Interface 99
- Running VMware ESX Server 105
- Management Interface window 105
- Using Disk Modes 108
- Monitoring System Status 109
- Using the Remote Console 114
- VMware Tools Settings 117
- Cutting, Copying and Pasting 119
- Using SNMP with ESX Server 125
- Configuring SNMP Security 132
- Name Data type Description 139
- Backing Up Virtual Machines 140
- Operating Systems 144
- Guest Operating System 147
- Guest Operating Systems 149
- To enable expert mode, 154
- To enable expert mode, … 156
- Service 167
- Console Operating System and 169
- VMkernel 169
- Operating System 171
- The VMkernel Loader 173
- VMkernel Device Modules 174
- Machines 179
- Configuring Virtual Machines 181
- Using VMkernel Devices 182
- Modifying the SMBIOS UUID 187
- Enabling Repeatable Resumes 191
- Authenticating Users 193
- Default Permissions 194
- Using vmkfstools 199
- Naming VMFS File Systems 205
- Determining SCSI Target IDs 208
- Sharing the SCSI Bus 210
- Using Storage Area Networks 212
- Networking 215
- Promiscuous Mode 222
- Sharing Network Adapters and 224
- Virtual Networks 224
- Performance Tuning for Heavy 228
- Network Loads 228
- Resource Management 231
- CPU Resource Management 234
- Multiprocessor Systems 235
- Memory Resource Management 239
- Admission Control 240
- Dynamic Allocation 240
- Memory Reclamation 241
- Memory Sharing 242
- Sizing Memory on the Server 249
- Virtual Machine Memory 250
- Memory Overcommitment 251
- More Information 252
- Network Bandwidth Management 253
- Disk Bandwidth Management 257
- Configuration File Options 258
- Glossary 261
- Appendix A: I/O Adapter 265
- Compatibility Guide 265
- Linux Driver Compatibility 267
- VMware Certification 267
- Adaptec SCSI Adapters 268
- Emulex Fibre Channel Adapters 272
- QLogic Fibre Channel Adapters 272
- Compaq RAID Controllers 272
- Mylex DAC960 RAID Controllers 273
- Intel Gigabit Ethernet NICs 277
- The OpenSSL Toolkit License 280
- License Issues 280
- Original SSLeay License 281
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