HP UX Encrypted Volume and Filesystem (EVFS) VxVM Example Increasing Volume and File System Sizes

#bdf /test1

bdf: /test1: I/O error

VxVM Example: Increasing Volume and File System Sizes

In the following sessions, the VxFS file system size is 66040 Kbytes, created on a 65-Mbyte (66560 Kbyte) VxVM volume (520 Kbytes is used for the EMD). The user increases the size of the VxVM volume to 112 Mbytes and wants to increase the corresponding file system size.

Correct

The user increases the VxVM volume size to 112 Mbytes (114688 Kbytes). When calculating the number of Kbytes available for the file system, the user reserves 1 Mbyte for the EVFS EMD: (112 –1) * 1024 = 113664 Kbytes. The existing file system size is 66040 Kbytes, so the user increases the file system size by 47624 Kbytes (113664 – 66040 = 47624).

#vxprint -g rootdg vol05

TY	NAME	ASSOC	KSTATE	LENGTH	PLOFFS	STATE	TUTIL0	PUTIL0
v	vol05	fsgen	ENABLED	66560	-	ACTIVE	-	-
pl	vol05-01	vol05	ENABLED	66560	-	ACTIVE	-	-
sd	c3t0d0-01	vol05-01	ENABLED	66560	0	-	-	-

#bdf /test5

Filesystem	kbytes	used	avail	%used Mounted on
/dev/evfs/vx/dsk/rootdgelvol05
	66040	1133	60858	2% /test5

#umount /test5

#vxassist -g rootdg growto vol05 112m

#vxprint -g rootdg vol05

TY	NAME	ASSOC	KSTATE	LENGTH	PLOFFS	STATE	TUTIL0	PUTIL0
v	vol05	fsgen	ENABLED	114688	-	ACTIVE	-	-
pl	vol05-01	vol05	ENABLED	114688	-	ACTIVE	-	-
sd	c3t0d0-01	vol05-01	ENABLED	114688	0	-	-	-

#extendfs -F vxfs -s 47624 /dev/evfs/vx/dsk/rootdg/vol05

#mount -F vxfs /dev/evfs/vx/dsk/rootdg/evol05 /test5

#bdf /test5

Filesystem	kbytes	used	avail	%used Mounted on
/dev/evfs/vx/dsk/rootdg/evol05
	113664	1141	105850	1% /test5

Incorrect

When calculating the number of Kbytes available for the file system, the user does not reserve space for the EVFS EMD. The VxVM is 112 Mbytes = 114688 Kbytes. The user attempts to increase the current file system size, 66040 Kbytes, by 48648 Kbytes to use all available space on the VxVM for the file system (114688 – 66040 = 48648).

#extendfs -F vxfs -s 48648 /dev/evfs/vg01/rlvol5

#vxfs extendfs: New size (114688 blocks) beyond device capacity (114168 blocks).

VxVM Example: Reducing Volume and File System Sizes

In the following sessions, the VxVM volume is 112 Mbytes and the file system size is 113664 Kbytes. The administrator wants to decrease the size of the VxVM volume to 64 Mbytes.

Correct

When calculating the number of Kbytes available for file system on a 64-Mbtye VxVM volume, the user reserves 1 Mbyte for the EMD: 64 – 1 Mbytes = 63 * 1024 = 64512 Kbytes for the file system. The user reduces the size of the file system to 64512 Kbytes, then reduces the size of the VxVM volume to 64 Mbytes.

#fsadm -F vxfs -b 64512 /test5

vxfs fsadm: /dev/evfs/vx/rdsk/rootdg/evol05 is currently 114040 sectors - size will be reduced

# vxassist -g rootdg -f shrinkto vol05 64m

Resizing EVFS Volumes and File Systems 99