10 More Discussions You Might Find Interesting
1. Linux
I have a freshly installed Oracle Linux 7.1 ( akin to RHEL ) server.
However after installing some Oracle software, I have noticed that my hard disk light is continually on and the system performance is slow.
So I check out SAR and IOSTAT
lab3:/root>iostat
Linux... (2 Replies)
Discussion started by: jimthompson
2 Replies
2. UNIX for Dummies Questions & Answers
In a SCO Unix shop, I am working on the following script to move any file to its same location on the target machine (called 'othersy' here):
pwd=`pwd`
for i in "$@"
do
echo " $i "
if ; then echo 1; else echo 0; fi
rcp -p $i othersy:$pwd/$i
echo "Finished with ^ If I find a file... (4 Replies)
Discussion started by: wbport
4 Replies
3. Solaris
Hello,
we have a machine with Solaris Express 11, 2 LSI 9211 8i SAS 2 controllers (multipath to disks), multiport backplane, 16 Seagate Cheetah 15K RPM disks.
Each disk has a sequential performance of 220/230 MB/s and in fact if I do a
dd if=/dev/zero of=/dev/rdsk/<diskID_1> bs=1024k... (1 Reply)
Discussion started by: golemico
1 Replies
4. Solaris
What tools/utilities do you use to generate metrics on disk i/o throughput on Solaris. For example, if I want to see the i/o rate of random or sequential r/w. (2 Replies)
Discussion started by: dangral
2 Replies
5. Red Hat
Running CentOS 5.5:
I've come across a relatively recent problem, where in the last 2 months or so, the root disk goes to 99% utilization for about 20 seconds when a user logs in. This occurs whether a user logs in locally or via ssh. I have tried using lsof to track down the process that is... (5 Replies)
Discussion started by: dangral
5 Replies
6. Red Hat
I am getting absolutely dreadful iowait stats on my disks when I am trying to install some applications.
I have 2 physical disks on which I have created 2 separate logical volume groups and a logical volume in each. I have dumped some stats as below
My dual core CPU is not being over utilised... (3 Replies)
Discussion started by: jimthompson
3 Replies
7. AIX
I'm search for a disk exerciser / load tool like iometer, iozone, diskx for IBM AIX 5.2 and 5.3
Because of a very bad disk performance on several AIX systems, I need to have a tool which is able to generate a disk load on my local and SAN disks.
Does somebody knows a kind of tool which is... (5 Replies)
Discussion started by: funsje
5 Replies
8. AIX
Hello,
I have a aix 570 system with san disk. I do write test of performance
in a lv with four disk. While the test I run filemon tools for trace
the disk activity. The outputs of filemon are at the en of this message. I
see my lV(logical volume) throughput at 100 meg by second. 2 of 4
disk... (0 Replies)
Discussion started by: Hugues
0 Replies
9. AIX
Can I change any AIX System paramerter for speeding the data Disk performance?
Currently it slows with writing operations. (1 Reply)
Discussion started by: gogogo
1 Replies
10. Filesystems, Disks and Memory
I have some questions regarding disk perfomance, and what I can do to make it just a little (or much :)) more faster.
From what I've heard the first partitions will be faster than the later ones because tracks at the outer edges of a hard drive platter simply moves faster. But I've also read in... (4 Replies)
Discussion started by: J.P
4 Replies
APMLABEL(8) BSD System Manager's Manual APMLABEL(8)
NAME
apmlabel -- update disk label from Apple Partition Map
SYNOPSIS
apmlabel [-fqrw] device
DESCRIPTION
apmlabel is used to update a NetBSD disk label from the Apple Partition Map found on disks that were previously used on Mac OS systems (or
other APM using systems).
apmlabel scans the APM contained in the first blocks of the disk and generates additional partition entries for the disk from the entries
found. Driver and patches partitions are ignored.
Each APM entry which does not have an equivalent partition in the disk label (equivalent in having the same size and offset) is added to the
first free partition slot in the disk label. A free partition slot is defined as one with an fstype of 'unused' and a size of zero ('0').
If there are not enough free slots in the disk label, a warning will be issued.
The raw partition (typically partition c, but d on i386 and some other platforms) is left alone during this process.
By default, the proposed changed disk label will be displayed and no disk label update will occur.
Available options:
-f Force an update, even if there has been no change.
-q Performs operations in a quiet fashion.
-r In conjunction with -w, also update the on-disk label.
-w Update the in-core label if it has been changed.
SEE ALSO
disklabel(8), dkctl(8), pdisk(8)
HISTORY
The apmlabel command appeared in NetBSD 5.0.
BSD
May 19, 2007 BSD