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186 The Virtualization Cookbook for Red Hat Enterprise Linux 5.2
0.0.0100(ECKD) at ( 94: 0) is dasda : active at blocksize 4096, 600840 blocks, 2347 MB
0.0.0101(FBA ) at ( 94: 4) is dasdb : active at blocksize 512, 524288 blocks, 256 MB
0.0.0102(FBA ) at ( 94: 8) is dasdc : active at blocksize 512, 1048576 blocks, 512 MB
0.0.0103(ECKD) at ( 94:12) is dasdd : active at blocksize 4096, 600840 blocks, 2347 MB
0.0.0104(ECKD) at ( 94:16) is dasde : active at blocksize 4096, 600840 blocks, 2347 MB
0.0.0105(ECKD) at ( 94:20) is dasdf : n/f
Format the minidisk using the dasdfmt command and make a single partition using the fdasd
-a command as you did before:
# dasdfmt -b 4096 -y -f /dev/dasdf
Finished formatting the device.
Rereading the partition table... ok
# fdasd -a /dev/dasdf
auto-creating one partition for the whole disk...
writing volume label...
writing VTOC...
rereading partition table...
Creating a physical volume
Use the pvcreate command to create a physical volume from the minidisk:
# pvcreate /dev/dasdf1
Physical volume "/dev/dasdf1" successfully created
Extending the volume group
Use the vgextend command to extend the volume group into the new physical volume. Then,
use vgdisplay to verify that the volume group has free space:
# vgextend homevg /dev/dasdf1
Volume group "homevg" successfully extended
# vgdisplay
--- Volume group ---
VG Name homevg
...
Total PE 2932
Alloc PE / Size 2346 / 9.16 GB
Free PE / Size 586 / 2.29 GB
VG UUID IHAq2g-ME3w-b6LY-E3hA-raNk-bF0G-Poprma
Note there are 586 new free physical extents (PEs) in this example.
Extend the logical volume and the file system
Now that you have free space in the volume group, you can increase the size of the existing
logical volume with the lvextend command. The -l option specifies the number extents to
add. Finally, use the resize2fs command, which increases the size of the file system while it
is mounted. You can use the df command to show the file system size before and after you
extend it, as the following example shows:
# df -h | grep home
/dev/mapper/homevg-homelv
9.1G 149M 8.5G 2% /home
# lvextend -l +586 /dev/homevg/homelv
Extending logical volume homelv to 11.45 GB
Logical volume homelv successfully resized
# resize2fs -p /dev/homevg/homelv
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/homevg/homelv is mounted on /home; on-line resizing required
Performing an on-line resize of /dev/homevg/homelv to 3002368 (4k) blocks.
The filesystem on /dev/homevg/homelv is now 3002368 blocks long.
- 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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