Seagate ST318404LC Betriebsanweisung PDF herunterladen (Seite 15)

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

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b. It is good to note at this juncture the difference between the two device files. The major

number 64 represents an LVM 1.x Volume Group (HP-UX 11i v2 or v1 Volume Groups), while the

major number of 128 represents an LVM 2.x Volume Group (HP-UX 11i v3 Volume Groups).

Also, with LVM 1.x, the first two minor numbers (as shown in RED above) represent the Volume

Group number; with LVM 2.x, we use the first three. As an example, we will create a Volume

Group called “vgdemo”. First, create a directory with the same name in /dev with the

following command.

Type: mkdir –p /dev/vgdemo

c. Next, create the device file you want to use to identify the Volume Group. As you see in RED

above, both 00 and 001 are in use. We will thus choose 0x02000 (LVM 1.x) as the next Volume

Group ID/number. To do this, issue the command.

Type: mknod /dev/vgdemo/group c 64 0x020000

Type: ls -la /dev/*/group

crw-r----- 1 root sys 64 0x000000 Aug 13 03:10 /dev/vg00/group

crw-rw-rw- 1 root sys 128 0x001000 Dec 2 13:38 /dev/vg01/group

crw-rw-rw- 1 root sys 64 0x020000 Dec 3 14:43 /dev/vgdemo/group

d. Once complete, you can now issue the vgcreate command (as outlined above) to create the

Volume Group.

Type: vgcreate –s 16 /dev/vgdemo /dev/dsk/c27t0d0

(where –s: use 16MB PE size)

Increased the number of physical extents per physical volume to 1919.

Volume group "/dev/vgdemo" has been successfully created.

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

Regardless of the method used above, issue the following command to validate the creation of the new

Volume Group.

Type: vgdisplay –v /dev/vgdemo

--- Volume groups ---

VG Name /dev/vgdemo

VG Write Access read/write

VG Status available

Max LV 255

Cur LV 0

Open LV 0

Max PV 16

Cur PV 1

Act PV 1

Max PE per PV 1919

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Seagate ST318404LC Betriebsanweisung Seite 15