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Dell Compellent Confidential HP-UX Best Practices 11i v2 and 11i v1

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mode. In any production environment, this would also require the necessary planning for downtime, as

well as getting any necessary change management approvals.

The first step in this process is to ensure that the Volume Group is OFFLINE (inactive) and if it is part of

a cluster (MC/Serviceguard or otherwise), then also made cluster unaware; if PE/Renumbering is

required, it would also need to be addressed accordingly. For the sake of simplicity in this example, we

shall assume that this Volume Group is NOT part of a cluster nor is PE/Renumbering required. For

further details about either of these latter two topics, refer to this document below.

 Using the vgmodify command to perform LVM Volume Group DLE and DLC

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf

Now we need to determine the appropriate configuration parameters for use with the “vgmodify”

command. While the Volume Group is still in an ONLINE (active) state, issue the command.

Type: vgmodify –t –v vgdemo

Volume Group configuration for /dev/vgdemo has been saved in /etc/lvmconf/vgdemo.conf

Current Volume Group settings:

Max LV 255

Max PV 16

Max PE per PV 1919

PE Size (Mbytes) 16

VGRA Size (Kbytes) 304

VGRA space (Kbytes) on all Physical Volumes:

PV current -n

/dev/rdsk/c27t0d1 1088 16384

Summary 1088 16384

Volume Group optimized settings (no PEs renumbered):

max_pv(-p) max_pe(-e) Disk size (Mb)

1 65535 1048561

2 65532 1048513

3 43772 700353

4 32764 524225

5 26108 417729

6 21756 348097

7 18684 298945

8 16380 262081

9 14588 233409

10 13052 208833

11 11772 188353

12 10748 171969

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Seagate ST318404LC Guida Utente Pagina 23