10 More Discussions You Might Find Interesting
1. BSD
hi
Has anyone already tried to migrate a hard disk with FreeBSD using recoverdisk? (1 Reply)
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2. Linux
Hi all,
I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it... (23 Replies)
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3. UNIX for Advanced & Expert Users
When we write a programme,we declare variables and compiler allocates memory to them.I want to get access to the physical block number of hard-disk where actually the data is stored by the programme "
Some one help me out... (3 Replies)
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4. Red Hat
When we write a programme,we declare variables and compiler allocates memory to them.I want to get access to the physical block number of hard-disk where actually the data is stored by the programme "
Some one help me out... (1 Reply)
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5. Solaris
Hi freinds,
What is the command to find out the hard disk details (logical name, FS type etc,). Because i connected one ntfs partition and i don't know the hard disk logical and physical name to mount it.Kindly do the needful.
Thanks | P.Bharathiraja. :mad: (2 Replies)
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6. SCO
hi
I've a fresh installation of SCO 5.0.7 on the IDE hard disk.
For SCSI hard disk I can declare, for example blc disk driver using:
# mkdev hd 0 SCSI-0 0 blc 0but it works for IDE hard disk? (3 Replies)
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7. UNIX for Dummies Questions & Answers
:eek: I use this Solaris to run CMS a call acounting software package for my job. No one could run reports today because it said the this when you logged on
"The following file systems are low, and could adversely affect server performance:
File system /: 99%full"
Can some one please explain... (9 Replies)
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8. UNIX Desktop Questions & Answers
I have a cuestion. How Can I to add other hard disk to my computer? I need to configurate anyone? (4 Replies)
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9. UNIX for Dummies Questions & Answers
Hello all..
Iam New to Unix Environment. I need to copy .cpio file from CD to a Folder on Sun 5.8 Box.
Can anyone give me the commands to execute this ?..
Thanks in advance
Ron (4 Replies)
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10. Filesystems, Disks and Memory
I had an issue with a second hard disk in my machine. I have a sparc station running solaris 7. It was working fine but now it wont mount on boot up and when you try to mount it manually it gives an I/O error. I tried a different disk as a control which was fine. What I want to know is if my... (3 Replies)
Discussion started by: Henrik
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FSYNC(2) Linux Programmer's Manual FSYNC(2)
NAME
fsync, fdatasync - synchronize a file's complete in-core state with that on disk
SYNOPSIS
#include <unistd.h>
int fsync(int fd);
int fdatasync(int fd);
DESCRIPTION
fsync copies all in-core parts of a file to disk, and waits until the device reports that all parts are on stable storage. It also updates
metadata stat information. It does not necessarily ensure that the entry in the directory containing the file has also reached disk. For
that an explicit fsync on the file descriptor of the directory is also needed.
fdatasync does the same as fsync but only flushes user data, not the meta data like the mtime or atime.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EBADF fd is not a valid file descriptor open for writing.
EROFS, EINVAL
fd is bound to a special file which does not support synchronization.
EIO An error occurred during synchronization.
NOTES
In case the hard disk has write cache enabled, the data may not really be on permanent storage when fsync/fdatasync return.
When an ext2 file system is mounted with the sync option, directory entries are also implicitly synced by fsync.
On kernels before 2.4, fsync on big files can be inefficient. An alternative might be to use the O_SYNC flag to open(2).
CONFORMING TO
POSIX.1b (formerly POSIX.4)
SEE ALSO
bdflush(2), open(2), sync(2), mount(8), update(8), sync(8)
Linux 1.3.85 2001-04-18 FSYNC(2)
06-05-2009
That helped. So I am guessing writing to the device file for the HDD, opened with (O_SYNC) coupled with an extra sync command and a sleep, between the 2 swipes should be enough to ensure what I am asking to be written to disk actually does get there.