hfs to vxfs

[Peter Gillis]

Hi there...
machine: d390 op sys: ux-11.00
I have an hfs system 3gig in size used for sybase database. DBA requires this filesys to take files larger than 2gig. Am I right in believing I will have to change this hfs to a vxfs filesystem and specify largefiles on the newfs command? We have basejfs installed - some filesystems are vxfs already. They are version 3 and appear to have all default settings for bsize, logsize etc. I hope to reuse the existing hfs filesystem space for this new vxfs filesys? Is there anything else I need to do with regards the kernel parameters or anything?

Any snippets of info greatly appreciated.
Thanks Maria.

[Michael Tully]

Hi,

You'll need to generate a new filesystem for this particular logical volume. You can't convert a hfs to vxfs filesystem. Have a look at this link for the filesystem sizing for various types.

You'll need to do this:

Backup existing filesystem, or create a new logical volume which can be copied if you have the space. Create the new filesystem with largefiles option. Mount the filsystem
Copy the information across using cpio
find . -depth -print | /bin/cpio -padlmuxv /newdir/data
unmount both filesystems.
Mount new logical volume on old mount point.
Of course you'll need to shutdown your database
whilst you do this.


http://www.docs.hp.com/hpux/onlinedocs/5971-2383/5971-2383.html

[T G Manikandan · Accepted solution]

YOu cannot convert the existing hfs file system to vxfs.

1.Backup the existing hfs volume.
2.Umount the file system
3.use
#newfs -F vxfs -o largefiles
Logical volume is the existing one which you are changing.
4.change the entries in the /etc/fstab file.

5.Mount the filesystem.

Thanks

[Frank Slootweg]

You do not *have* to change to VxFS in order to allow largefiles (files >2GB). HFS can also have largefiles and you can convert an existing HFS filesystem to large files. For details, see the fsadm_hfs(1M) manual page ("man fsadm_hfs"), especially the "-o largefiles" option.

Of course you *can* 'go to' VxFS if you *want* to, but you don't *have* to.

As others have mentioned, if you want to 'go to' VxFS, you will have to backup/restore, because you can not *convert* an existing HFS filesystem to VxFS 'in place'.

[Peter Gillis]

Thanks heaps for your replies. all the info was of use and helped improve my understanding of it all too....bonus!
see ya.Maria

[Sanjay_6]

Hi Maria,

If you just want to change the largefiles options for the filesystem, you can do so for the "hfs" filesystems also. Try these links below for more help,

http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000047669207

http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000009872653

Hope this helps.

Regds