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Chapter 4. Installing and configuring z/VM 63
To learn how to back up these volumes to tape, refer to Step 11, Store a backup copy of
the z/VM system on tape, which you can find in Chapter 8 “Load the system image” in
z/VM Guide for Automated Installation and Service, GC204-6099.
4.11 Relabeling the system volumes
Relabeling the system volumes is optional, but recommended. There are times when you will
want to change the volume labels of the five z/VM system volumes (or three, if you installed
onto 3390-3s). If there is a possibility that another vanilla z/VM system with the same labels is
installed onto volumes accessible by your z/VM system, then one of the systems will not IPL
correctly.
When installing z/VM, it is possible to modify all but one volume label, that of the 540RES
volume. This alleviates the problem that is described next, but it does not alleviate the
problem of duplicate volume names.
To understand this possibility, refer to Figure 4-13. The z/VM system with the lower device
addresses starting at E340 should IPL without any problem (although you may see a warning
at system startup time about duplicate volume labels). However, if the z/VM system starting at
device address F000 is IPLed, the 540RES volume will be used, but the remaining volumes in
the system are searched for by volume label, not by device address. Because the z/VM
system 1 addresses are lower than the z/VM system 2 addresses, system 2 will be using the
system 1 volumes, which is undesirable for either system.
Figure 4-13 The problem with two z/VM systems with identical volume labels
If there is a possibility of another z/VM system being installed on DASD that this system will
have access to, it is recommended that you perform the following steps. You will need access
to the HMC to perform them:
Modifying labels in the SYSTEM CONFIG file
Modifying labels in the USER DIRECT file
Changing the labels on the five volumes
Shutting down your system and restarting it
Important: This process must be performed as documented, because making a mistake in
one of the steps can easily produce an unusable system. Proceed carefully and your
system will come back with no problems. Try to do all steps in succession in a short
amount of time.
540RES 540W02
540W01
540PAG
540SPL
540RES 540W02
540W01
540PAG540SPL
E340
E341 E342 E343 E344
F002F001
F003
F004
F000
z/VM system 1
z/VM system 2
LPAR1
- The Virtualization Cookbook 1
- Linux 5.2 3
- October 2008 3
- First Edition (October 2008) 4
- Contents 5
- Contents v 7
- Contents vii 9
- Trademarks 12
- The team that wrote this book 13
- Chapters and appendixes 15
- Conventions 17
- Comments welcome 17
- 1.1 What is virtualization 20
- 1.2 This book’s approach 21
- 1.4 Infrastructure design 22
- Planning 25
- 2.1 Bill of materials 26
- 2.2 z/VM conventions 27
- 2.3 Disk planning 28
- DASD versus SCSI/FCP 29
- 3390-3s versus 3390-9s 29
- Disk storage per Linux image 29
- 2.4 Memory planning 30
- 2.5 Password planning 30
- 2.6 Planning worksheets 31
- 2.7 Blank worksheets 34
- 2.7.2 z/VM DASD worksheet 35
- Configuring a desktop machine 37
- Figure 3-2 Setting logging 39
- Saving sessions 41
- 3.2 Setting up a VNC client 42
- 3.3 3270 emulators 43
- 4.1 Installing z/VM from DVD 46
- ==> instplan 50
- Running INSTDVD 52
- Figure 4-8 Load window 53
- ==> cold drain noautolog 54
- ==> no 54
- ==> disc 54
- 4.2 Configuring TCP/IP 56
- not specified 62
- 4.6 Adding paging volumes 65
- Using the CPFORMAT EXEC 67
- 4.6.4 Testing the changes 71
- 4.8.2 Testing the changes 78
- 4.9.1 VM security products 79
- ==> sampnss cms 86
- Servicing z/VM 89
- 5.1 Applying a PTF 90
- 6.4 Enabling the NFS server 106
- 7.2.3 Configuring VDISK swap 128
- 7.2.4 Configuring yum 128
- 7.2.5 Adding additional RPMs 129
- 7.2.10 Configuring SSH keys 134
- 4 6763) is running 135
- 8.2.4 Adding additional RPMs 145
- 8.2.8 Configuring SSH keys 145
- 8.2.9 Rebooting the system 146
- 8.2.10 Verifying the changes 146
- Detach the source disks 151
- Detach the target disks 154
- IPL the target system 154
- 9.3.2 Using the clone script 157
- FLASHCOPY 159
- Installation Server 159
- Master Image 159
- 9.5 Reviewing system status 163
- LNXMAINT 164
- Delete these 167
- Servicing Linux with Red Hat 171
- 12.1.2 Testing Apache 179
- 12.1.3 Turning on a firewall 179
- 12.1.6 Apache resources 182
- Start the LDAP service 184
- Deleting duplicate users 186
- Set a password 189
- 12.3.4 Adding a Samba user 191
- 12.3.6 Testing your changes 192
- 12.3.7 Configuring printing 193
- 12.4.1 Additional resources 194
- Linux kernel development 195
- Web development 195
- Miscellaneous recipes 197
- 13.1 Adding a logical volume 198
- Volume Group - optvg 200
- Creating a physical volume 204
- Extending the volume group 204
- /var/lib/ldap 205
- Configuring LDAP 206
- Configuring automount 207
- 13.4 Rescuing a Linux system 208
- Monitoring z/VM and Linux 211
- INIDICATE LOAD 212
- INDICATE QUEUES EXP 213
- Getting help 214
- Determining who is logged on 214
- Determining storage or memory 215
- Determining software level 215
- 14.2.3 Configuring PERFSVM 218
- Using a Web browser interface 220
- Using a 3270 interface 222
- 14.3 Monitoring Linux 223
- PURGE NSS NAME MONDCSS 228
- CP SAVESEG MONDCSS 228
- References 229
- Quick reference sheets 230
- Prefix commands 231
- :help give help 232
- Appendix B. z/VM source code 233
- The CPFORMAT EXEC 234
- The CHPW540 XEDIT macro 238
- The LABEL540 EXEC 241
- The LABEL540 XEDIT macro 243
- Linux source code 245
- Related publications 257
- Online resources 258
- How to get Redbooks 258
- Help from IBM 258
- Hat Enterprise Linux 5.2 265
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