10-17-2002
There's gotta be some confusion here...
On HP-UX, 4 MB is the default extent size for LVM. LVM takes a collection of physical disks and carves them up into usuable disk sections.
When you're actually using the disk sections, the LVM extent size is invisible to you. You can use these disk sections for swap areas, dump areas, raw database sections and even filesystems.
And if you wanted, you can bypass LVM and use disk directly for any of these things. If you did that, you would not even have an LVM extent size.
The Veritas filesystem also has a notion of extents but 4 MB is impossibly large for that.
8 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi there,
Can anyone tell me the advantages that jfs has over Veritas (if any)??
Cheers. (5 Replies)
Discussion started by: rich
5 Replies
2. AIX
Hi,
I am getting an error message when i try to increase the size of a filesystems
under AIX 4.3.3:
chfs: 0506-932 Can not extend a JFS file system with nbpi = 4096
and frag = 4096 past 134217728 (512 byte blocks).
-> Characteristics Journaled File System
... (4 Replies)
Discussion started by: Can
4 Replies
3. AIX
hi all,
can sumbody give me a link which gives the basic layout of JFS, JFS2 and the veritas file system.
and i also want to know about the data structures used in this filsystem
thanx in advance (0 Replies)
Discussion started by: anwerreyaz
0 Replies
4. AIX
Hi All,
I can't create a FS from a SAN VG with size of 160G on JFS (NOT JFS2, requirement with application) with large file enabled.
It only let me create 64G in maximum size. The actual size of SAN VG is also 160G, the FS can be smaller than 160G because of the inode allocation.
Please... (1 Reply)
Discussion started by: itik
1 Replies
5. Shell Programming and Scripting
Hi,
Can someone help me with creating a bash shell script.
I need to create a script that gets a positive number n as an argument.
The script must create n directories in the current directory with names like map_1, map_2 etcetera. Each directory must be contained within its predecessor. So... (7 Replies)
Discussion started by: I-1
7 Replies
6. AIX
Hello all,
I'm trying to grow a file system by 500MB using SMIT on AIX 5.2 but I receive this error:
"0516-404 allocp: This system cannot fulfill the allocation request.
There are not enough free partitions or not enough physical volumes
to keep strictness and satisfy allocation requests.... (3 Replies)
Discussion started by: need2bageek
3 Replies
7. AIX
Hi all,
Can anyone define the difference between jfs and jfs2 filesystem as well as usage of jfs log files....
Thanks.... (7 Replies)
Discussion started by: sumathi.k
7 Replies
8. AIX
how to change the filesystem from jfs to jfs2 in ibm aix6.1
please tell me command for that.
thank you,
paandu (2 Replies)
Discussion started by: paandur
2 Replies
LEARN ABOUT SUSE
jfs_logdump
jfs_logdump(8) JFS utility - journal log dump jfs_logdump(8)
NAME
jfs_logdump - dump a JFS formatted device's journal log
SYNOPSIS
jfs_logdump [ -a ] device
DESCRIPTION
jfs_logdump dumps the contents of the journal log from the specified JFS formatted device into output file ./jfslog.dmp.
device is the special file name corresponding to the actual device from which the journal log will be dumped (e.g. /dev/hdb1 ).
jfs_logdump must be run as root.
OPTIONS
-a Dump the entire contents of the journal log instead of just the committed transactions since the last synch point.
EXAMPLE
Dump the entire JFS journal log from the 3rd partition of the 2nd hard disk into ./jfslog.dmp:
jfs_logdump -a /dev/hdb3
REPORTING BUGS
If you find a bug in JFS or jfs_logdump, please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:
http://jfs.sourceforge.net/
Please send as much pertinent information as possible, including any jfs_logdump error messages and the complete output of running jfs_fsck
with the -v option on the JFS device.
SEE ALSO
jfs_fsck(8), jfs_mkfs(8), jfs_fscklog(8), jfs_tune(8), jfs_debugfs(8)
AUTHORS
Barry Arndt (barndt@us.ibm.com)
William Braswell, Jr.
jfs_logdump is maintained by IBM.
See the JFS project web site for more details:
http://jfs.sourceforge.net/
October 29, 2002 jfs_logdump(8)