lvreduce

[Daniel Schneider]

Hi freaks,
I want to reduce a logical Volume and extend with the freed space from the first.
It is HP-UX 10.20 and OnlineJFS.
Now I want to know if I can prevent the loss of data, if I use fsadm -D before reducing. Is it right, that fsadm cleans the last diskspace, so that I can reduce this area without loosing data?
Thanks 4 all Help

Best regards
Daniel

[Dan Hetzel · Accepted solution]

Hi,

'fsadm -d -s ...' followed by 'fsdam -e -s ...' would re-organize directories and reduce fragmentation.

'lvreduce' can then be run "safely"

Keep in mind that the lvreduce command on a logical volume containing a file system of greater length than the size being reduced to will cause data corruption.

Dan

[James R. Ferguson]

Daniel:

With online JFS you can increase or decrease the size of a logical volume without data loss. You may have to defragment first before attempting a reduction. See the man pages for 'fsadm'.

...JRF...

[Daniel Schneider]

Thank you very much!
Your Information was very helpfully.

Best regards
Daniel