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Conference turris::digital_unix

Title:	DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:	Welcome to the Digital UNIX Conference
Moderator:	SMURF::DENHAM

Created:	Thu Mar 16 1995
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	10068
Total number of notes:	35879

8653.0. "Logital Storage Manager Question" by WRKSYS::PRESTIA () Thu Jan 30 1997 14:16

I am running UNIX 4.0B on an AS1000 4/200. 

I have an existing concatenated volume created out of 3 2gb rz28 disks.
No mirroring or striping.

I want to add 2 additional 2gb disks to this volume.

I increased the size of the volume with the volassist command, which appeared
to work.

I did a voldiskadd command which appeared to work for the 2 disks (rz1 & rz3)

The output of volprint is:

# volprint
TYPE NAME         ASSOC        KSTATE     LENGTH COMMENT
dg   rootdg       rootdg       -               -
dm   disk01       rz9          -         4109440
dm   disk02       rz10         -         4109440
dm   disk03       rz1          -         4109440
dm   disk04       rz3          -         4109440
dm   rz8          rz8          -         4109440
sd   disk01-01    volbench-01  -         4109440
sd   disk02-01    volbench-01  -         4109440
sd   disk03-01    volbench-01  -         4109440
sd   disk04-01    volbench-01  -         4042240
sd   rz8-01       volbench-01  -         4109440
plex volbench-01  volbench     ENABLED  20480000
vol  volbench     fsgen        ENABLED  20480000

This appears ok to me, reflecting the 5 2gb disks (each with a private and
public area).

The dxlsm display of the volume reflects the 2 additional disks in the
"V" volbench display.

The problem is, I don't see this increase in disk space reflected in the
"df" command of the mounted volume:

Filesystem              512-blocks used      Avail    Cap.  Mounted on
/dev/vol/rootdg/volbench 11907712  9104564   1612376  85%   /bench_data

This is still reflecting the original approx 6gb of disk space, when it
should be reflecting the increase to approx. 10gb.

Any ideas on what steps I missed?

Thanks, Chris

T.R Title User Personal
Name Date Lines

8653.1 DECWET::MARTIN Thu Jan 30 1997 15:05 11

T.R	Title	User	Personal Name	Date	Lines
8653.1		DECWET::MARTIN		`Thu Jan 30 1997 15:05`	11
	I believe you missed the "newfs" step. That's right, you'll need to back up all the data, create a new UFS device, then restore all the data in order to see the new disk space. If you were using AdvFS, you could create a second LSM logical volume out of the two new disks, then 'addvol' that to the existing AdvFS domain. But, AdvFS has the same restriction of UFS in that just adding the two disks to the LSM volume does not inform the file system that there's more space available. --Ken

I believe you missed the "newfs" step.

That's right, you'll need to back up all the data, create a new UFS device, then
restore all the data in order to see the new disk space.

If you were using AdvFS, you could create a second LSM logical volume out of the
two new disks, then 'addvol' that to the existing AdvFS domain.  But, AdvFS has
the same restriction of UFS in that just adding the two disks to the LSM volume
does not inform the file system that there's more space available.

--Ken