09-09-2009
you can't relabel a disk that is in use...
10 More Discussions You Might Find Interesting
1. Programming
I everybody!!
How can i use statvfs() to calculate disk usage and free disk space??
Im using this code:
/* Any file on the filesystem in question */
char *filename = "/home/nesto/test/test.cpp";
struct statvfs buf;
if (!statvfs(filename, &buf)) {
... (1 Reply)
Discussion started by: ninjanesto
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2. AIX
Hello,
I would like to free some space to install gcc with is about 50M large, and I have no free space on my system. What can I delete?
Filesystem 1024-blocks Used Free %Used Iused Ifree %Iused Mounted on
/dev/hd4 262144 145436 116708 56% 7981 ... (10 Replies)
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is there a command to get the total disk space (available + free) on the solaris server ?
thanks (3 Replies)
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I'm getting ready to start a LU from Sol 9 to Solaris 10. I want to ensure that I have enough disk space for future upgrades. What I don't know is what free space Solaris requires.
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5. Shell Programming and Scripting
Hi,
I would like to create the new file system(mount point) in our unix server.
before that i would like to know the total free space available in /home directory.
Can you please let me know, how to find free space available for new filesystem?
Be careful with your spelling and... (2 Replies)
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6. Red Hat
Hi, I am having similar issue showing filesystem 100% even after deleting the files. I understood the issue after going through this chain. But i can not restart the processes being oracle database. Is there way like mounting filesytem with specific options would avoid happening this issue.
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7. Solaris
Version: Solaris 10 (August 2011) on VM
I am kind of new to Solaris.From VM workstation i allocated 35 GB to this Solaris VM's Disk
The disk was named
c1t0d0
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8. AIX
my users has requested more space to a particular volume group, so i do a lsvg
honda:/tmp/ab/ecc # lsvg
rootvg
OP24BCKVG
OP24ORAvg
OP24SYSVG
OP24DATVG
the user wants to know what disks are available to be added to any of the vgs listed above, (not including rootvg)
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9. Shell Programming and Scripting
i want to write a shell script,when disk uses is 90% then automatically send a email to distribution list (group member)...... (1 Reply)
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10. Solaris
Hi,
I need about 500G space in one corporate solaris server.
However, I am not sure which command to use to check this.
There are few volume groups in the server, and I deleted unused, old volume groups to clear some space.
However, now I am not sure how to check the free space itself.
... (2 Replies)
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LEARN ABOUT POSIX
sd_readahead
SD_READAHEAD(3) sd_readahead SD_READAHEAD(3)
NAME
sd_readahead - Control ongoing disk boot-time read-ahead operations
SYNOPSIS
#include "sd-readahead.h"
int sd_readahead(const char *action);
DESCRIPTION
sd_readahead() may be called by programs involved with early boot-up to control ongoing boot-time disk read-ahead operations. It may be
used to terminate read-ahead operations in case an uncommon disk access pattern is to be expected and hence read-ahead replay or collection
is unlikely to have the desired speed-up effect on the current or future boot-ups.
The action should be one of the following strings:
cancel
Terminates read-ahead data collection, and drops all read-ahead data collected during this boot-up.
done
Terminates read-ahead data collection, but keeps all read-ahead data collected during this boot-up around for use during subsequent
boot-ups.
noreplay
Terminates read-ahead replay.
RETURN VALUE
On failure, these calls return a negative errno-style error code. It is generally recommended to ignore the return value of this call.
NOTES
This function is provided by the reference implementation of APIs for controlling boot-time read-ahead and distributed with the systemd
package. The algorithm it implements is simple, and can easily be reimplemented in daemons if it is important to support this interface
without using the reference implementation.
Internally, this function creates a file in /run/systemd/readahead/ which is then used as flag file to notify the read-ahead subsystem.
For details about the algorithm check the liberally licensed reference implementation sources:
http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c resp.
http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h
sd_readahead() is implemented in the reference implementation's drop-in sd-readahead.c and sd-readahead.h files. It is recommended that
applications consuming this API copy the implementation into their source tree. For more details about the reference implementation see sd-
readahead(7)
If -DDISABLE_SYSTEMD is set during compilation this function will always return 0 and otherwise become a NOP.
EXAMPLES
Example 1. Cancelling all read-ahead operations
During boots where SELinux has to relabel the file system hierarchy, it will create a large amount of disk accesses that are not necessary
during normal boots. Hence it is a good idea to disable both read-ahead replay and read-ahead collection.
sd_readahead("cancel");
sd_readahead("noreplay");
SEE ALSO
systemd(1), sd-readahead(7), daemon(7)
AUTHOR
Lennart Poettering <lennart@poettering.net>
Developer
systemd 10/07/2013 SD_READAHEAD(3)