10-10-2002
I answered part of your question on the other post for the same topic.
Here is a site that may help you tremendously. Look in chapter 4.
http://www.redbooks.ibm.com/SG245139/5139fm.htm
For most OSs, I believe I can say that 4mb is the default size for OS filesystems. To see your block size, you should be able to run a command on the volumes/slices. On HPUX it is something like "vgdisplay -v /dev/vg01/lvol". The information at the top will show it. Do a "man -k block" to find your command in your man pages.
You can set the blocksize when you create new filesystems. It can't be changed once you have created a volume/filesystem. You would have to backup the data and destroy and recreate the filesystem to change the block size.
You will have to create new filesystems to migrate data to or backup and recreate the ones you have.
Last edited by Kelam_Magnus; 10-10-2002 at 04:52 PM..
10 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
Hi,
Somehow i have forgotten a comand that displays me the block size of the unix filesystem. Can someone letme know this command
regards
penguin (5 Replies)
Discussion started by: linuxpenguin
5 Replies
2. Solaris
how do you determine block size for a file system? In solaris 5.8 (3 Replies)
Discussion started by: csaunders
3 Replies
3. UNIX for Dummies Questions & Answers
Hello Unix guru's
I want to check my OS Block size for the Solaris 8
Following is one of the line from df -g command.
Can anybody help to interpret the same.
/u03 (/dev/vx/dsk/oradg/vol03): 8192 block size 8192 frag size
205463552 total blocks 50433792... (1 Reply)
Discussion started by: Dilippatel
1 Replies
4. Shell Programming and Scripting
i wrote this code to figure if two identical directories on different devices one on a partition and one on a loop had the same total size for -size +0 file only in recrusive tree form.:
awk '$1 ~ /^-/{total=i;i<=NR;i+=$5;print $0}END{print total}'
file1.... .
the output of du -hb was slightly... (2 Replies)
Discussion started by: moxxx68
2 Replies
5. UNIX for Dummies Questions & Answers
If I execute this command:
$ ls -lt | awk '{print $5}' | sort -nr |head -1
it returns the following value
57441881
If I execute this command:
$ ls -s | sort -nr | head -1 | cut -d" " -f1
it returns the same file but now in block size
112208
Is there... (1 Reply)
Discussion started by: mh53j_fe
1 Replies
6. UNIX for Dummies Questions & Answers
Hi All,
drwxr-xr-x 2 root root 4096 May 31 14:47 test
Please let me know here 4096 indicating what?
Thanks & Regards,
Bache (1 Reply)
Discussion started by: bache_gowda
1 Replies
7. AIX
Hi, I try to change the block size from 512 to 0, but it send this message:
0514-068 Cause not know
Can someone help me whith this? (3 Replies)
Discussion started by: Ruben78
3 Replies
8. UNIX for Advanced & Expert Users
Hello,
in one default UFS filesystem we have 8K block size (bsize) and 1K fragmentsize (fsize). At this scenary I thought all "FileSytem IO" will be 8K (or greater) but never smaller than the fragment size (1K). If a UFS fragment/blocksize is allwasy several ADJACENTS sectors on disk (in a ... (4 Replies)
Discussion started by: rarino2
4 Replies
9. Red Hat
Hi Guys,
I am running Linux 2.6.18-164.el x86_64 how do i check the block size?
Thanks in advance... (1 Reply)
Discussion started by: Phuti
1 Replies
10. HP-UX
Accordingly a lot of manuals - if you have block size 8KB and trying to write a 1KB file to the block, as result you waste 7KB of the block space. But recently I noticed about Fragments of File Block. In same case if you have File Block 8KB and Fragment size 1KB - you can save your block space,... (6 Replies)
Discussion started by: jess_t03
6 Replies
LEARN ABOUT SUSE
xfs_rtcp
xfs_rtcp(8) System Manager's Manual xfs_rtcp(8)
NAME
xfs_rtcp - XFS realtime copy command
SYNOPSIS
xfs_rtcp [ -e extsize ] [ -p ] source ... target
DESCRIPTION
xfs_rtcp copies a file to the realtime partition on an XFS filesystem. If there is more than one source and target, the final argument
(the target) must be a directory which already exists.
OPTIONS
-e extsize
Sets the extent size of the destination realtime file.
-p Use if the size of the source file is not an even multiple of the block size of the destination filesystem. When -p is specified
xfs_rtcp will pad the destination file to a size which is an even multiple of the filesystem block size. This is necessary since
the realtime file is created using direct I/O and the minimum I/O is the filesystem block size.
SEE ALSO
xfs(5), mkfs.xfs(8), mount(8).
CAVEATS
Currently, realtime partitions are not supported under the Linux version of XFS, and use of a realtime partition WILL CAUSE CORRUPTION on
the data partition. As such, this command is made available for curious DEVELOPERS ONLY at this point in time.
xfs_rtcp(8)