Is there any danger to keeping one of my disks at 100% capacity? (it's a disk just used for read-only files, not system files or anything like that).
It's HP-UX if that matters.
Thanks! (1 Reply)
Hi,
In Sun solaris o/s how can i find the memory space available,Swap space.
By giving df command i can get the disc space.
I want RAM space & swap space.
If anybody assist me.that is great.
Thanks (2 Replies)
hai all,
hope you people will guide me.
please suggest me how find an errored disk in a ssa-100 array.
what is the error message we get , when a disk fails and where
is it logged.
iam using solaris 8 version.
please help me (2 Replies)
Hi, Im getting a downtime of 4 hrs to do porting of bootdisks.
Currently, the system is running on Sf4800. 2 internal disk 36G connected to a SE3510 storage.
We're getting 72G disks and we want to restore the OS from the current 36G to the 72G disk. System is under veritas volume manager ctrl.... (4 Replies)
Hello all,
I was hoping to use a spare NAS as a ZFS fileserver and try a few things.
Unfortunately it has a huge raid for data, but a small 1G system disk. As I want to use the kernel CIFS server, I need OpenSolaris, which doesn't install without all the bloated Gnomestuff (oh well)
So I... (2 Replies)
Hi all,
I am new to Unix and I want to write a shell script in a jumpbox for finding the filesystem capacity on 50 unix servers ( by ssh ) and then email the result in HTML format with server name and capacity % to a specific outlook distribution list.
any suggestion would be of great help. (17 Replies)
I need to find available disk space for /home.
$ df /home
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mahhh/VolGroup11-LogVol00
32281452 45028 26034172 15% /
$df /home |tail -1| awk '{print $4}'
15%
The above result shows the... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
I am pretty close I think, but stuck. I don't know how to send an email to the user specified on the command line, and I receive an error stating -ge expecting a unary value(lines... (14 Replies)
i have a query on checking Tru64 disk drives physical capacity.
i used hwmgr view devices and saw this disk.
160: /dev/disk/dsk7c COMPAQ BF03688284 bus-3-targ-0-lun-0
checking the model on the internet shows it is a 36.4GB drive.
i checked the disk details and saw the... (2 Replies)
Discussion started by: iamnotaguru
2 Replies
LEARN ABOUT HPUX
prealloc
prealloc(2) System Calls Manual prealloc(2)NAME
prealloc - preallocate fast disk storage
SYNOPSIS DESCRIPTION
is used to preallocate space on a disk for faster storage operations.
fildes is a file descriptor obtained from a or system call for an ordinary file of zero length. It must be opened writable, because it
will be written to by size is the size in bytes to be preallocated for the file specified by fildes. At least size bytes will be allo-
cated. Space is allocated in an implementation-dependent fashion for fast sequential reads and writes. The EOF in an extended file is
left at the end of the preallocated area. The current file pointer is left at zero. The file is zero-filled.
Using on a file does not give the file an attribute that is inherited when copying or restoring the file using a program such as or (see
cp(1) and tar(1)). It simply ensures that disk space has been preallocated for size bytes in a manner suited for sequential access. The
file can be extended beyond these limits by operations past the original end of file. However, this space will not necessarily be allo-
cated using any special strategy.
RETURN VALUE
Upon successful completion, returns 0; otherwise, it returns -1 and sets to indicate the error.
ERRORS
fails and no disk space is allocated if any of the following conditions are encountered:
[EBADF] fildes is not a valid open file descriptor opened for writing.
[EDQUOT] User's disk quota block limit has been reached for this file system.
[EFBIG] size exceeds the maximum file size or the process's file size limit. See ulimit(2).
[ENOSPC] Not enough space is left on the device to allocate the requested amount; no space was allocated.
[ENOTEMPTY] fildes not associated with an ordinary file of zero length.
EXAMPLES
Assuming a process has opened a file for writing, the following call to preallocates at least 50000 bytes on disk for the file represented
by file descriptor outfd:
WARNINGS
Allocation of the file space is highly dependent on current disk usage. A successful return does not tell you how fragmented the file
actually might be if the disk is nearing its capacity.
AUTHOR
was developed by HP.
SEE ALSO prealloc(1), creat(2), dup(2), fcntl(2), open(2), prealloc64(2), read(2), ulimit(2), write(2).
prealloc(2)