The output of ls -l /sys/block/*/device should give you an idea about how each device is connected to the system.
In the example below red is a virtual disk on an internal RAID controller, green is a CD-ROM connected via an IDE controller, and the rest are SAN-connected SCSI disks where "hostN" refers to the instance of the Host Bus Adapter they are connected to.
Hello everyone.
I was wondering if there is a way to increase the size on the LUN on a SAN and make the Linux kernel understand the changes without restarting?
In the past it has always been rebooted to see the new values but im sure that there is a way now for the lvm to see the Free PE in... (8 Replies)
Hi,
I'm new to SAN storage so I was wondering if someone can assist me with a problem. I have a solaris 10 OS with 3 SAN devices attached. We are trying to troubleshoot performance so I was asked to get the WWN of each SAN disk and show what it's attached to via the SVM mount in the metastat... (1 Reply)
Hi,
I have a SAN LUN of 550 GB created as an ext3 partition of the entire lun and need to make the lun and partition larger... 600 GB
# fdisk -l /dev/sdj
Disk /dev/sdj: 590.5 GB, 590558003200 bytes
255 heads, 63 sectors/track, 71797 cylinders
Units = cylinders of 16065 * 512 = 8225280... (3 Replies)
I am using hp ux 11.31
Our SAN storage is being presented from an IBM XIV.
We have 3 HP servers (rx4640's), and the XIV has them setup in a cluster, so that when a disk is presented all 3 servers can see the new LUN.
I'm setting up a new VM on one of the HP servers. I have allocated a 34Gb... (1 Reply)
Hello Everyone,
Can someone help me to mount a SAN hdisk which contains a clone data copy(san) of the remote server to the another machine. Both servers are running in AIX.
Thanks in advance !
Regards,
Gowtham.G (3 Replies)
Hi guys,
We have created a LUN on SAN and assigned it to a server.
On top of it we have created 4 LVM shares which are holding the data.
Is it possible to add this LUN to some other server and access the data on LVM shares?(noob here) (1 Reply)
hello,
i am an oracle DBA and trying to scan a newly created LUN of 200 GB on fiber channel by SAN admin.we have solaris 10 and SANtoolkit is installed.i tried following to get the new LUN at my machine. go /opt/Netapp/Santoolkit/bin and then ./sanlun lun show but i see only the existing... (12 Replies)
Hi All,
I am new for this blog and this is my first Query on this blog. I would like to dael with graet masters on linux.
Here we go,
After storage people created the LUN, How to add that LUN to Linux server. (Make that LUN visibility on linux server.) ?
How to view the LUN... (5 Replies)
Hello to all,
Actually, currently on my Solaris box, I've a LUN (5TB space) from a EMC storage which is working fine, and a partition with ZFS filesystem is created for that LUN. as further you'll see in the logs, the "c4t6006016053802E00E6A9196B6506E211d0s2" is the current configured LUN in the... (4 Replies)
Hello,
We have IBM storwize v7000 storage. I have created thin provisioned LUN and attached it to my server(dell r910, Centos 7).
Whenever I copy files in that LUN correspondingly Thin provisioned LUN's used space increases but when I remove files to free up space the LUN's size isn't... (5 Replies)
Discussion started by: Vit0_Corleone
5 Replies
LEARN ABOUT HPUX
iostat
iostat(1) General Commands Manual iostat(1)NAME
iostat - report I/O statistics
SYNOPSIS
[interval [count]]
DESCRIPTION
iteratively reports I/O statistics for each active disk on the system. Disk data is arranged in a four-column format:
Column Heading Interpretation
--------------------------------------------------
device Device name
bps Kilobytes transferred per second
sps Number of seeks per second
msps Milliseconds per average seek
If two or more disks are present, data is presented on successive lines for each disk.
To compute this information, seeks, data transfer completions, and the number of words transferred are counted for each disk. Also, the
state of each disk is examined times per second (as defined in and a tally is made if the disk is active. These numbers can be combined
with the transfer rates of each device to determine average seek times for each device.
With the advent of new disk technologies, such as data striping, where a single data transfer is spread across several disks, the number of
milliseconds per average seek becomes impossible to compute accurately. At best it is only an approximation, varying greatly, based on
several dynamic system conditions. For this reason and to maintain backward compatibility, the milliseconds per average seek field is set
to the value 1.0.
Options
recognizes the following options and command-line arguments:
Report terminal statistics as well as disk (or lunpath) statistics.
When used with the option, lunpath and terminal statistics are displayed. Terminal statistics include:
Number of characters read from terminals.
Number of characters written to terminals.
Percentage of time
system (active processors) has spent in user mode.
Percentage of time
system (active processors) has spent in user mode running low-priority (nice) processes.
Percentage of time
system (active processors) has spent in system mode.
Percentage of time
system (active processors) has spent idling.
interval Display successive lines which are summaries of the last interval seconds. The first line reported is for the time
since a reboot and each subsequent line is for the last interval only.
count Repeat the statistics count times.
Report active lunpath statistics. When used with the
option, lunpath and terminal statistics are reported. The lunpaths are not displayed in any specific order, and the
current order may change in future releases. Lunpath data is arranged in a four-column format:
symbolic name of the lunpath of the form:
diskm_lunpathn, where m is the instance number of LUN and n is the instance number of lunpath. For example,
in disk47_lunpath7, m is 47 and n is 7. These instance numbers are displayed by using the option for the
LUN and lunpath entries. For more information on LUN and lunpath hardware path, refer to intro(7).
Kilobytes transferred per second.
Number of seeks per second.
Milliseconds per average seek.
For multiple lunpaths, data is presented on successive lines for each active lunpath. If no lunpaths were active, a
blank line is printed.
EXAMPLES
Show current I/O statistics for all disks:
Display I/O statistics for all disks every 10 seconds until INTERRUPT or QUIT is pressed:
Display I/O statistics for all disks every 10 seconds and terminate after 5 successive readings:
Display I/O statistics for all disks every 10 seconds, also show terminal and processor statistics, and terminate after 5 successive read-
ings:
Display I/O statistics for all active lunpaths:
Display I/O statistics for all active lunpaths every 10 seconds until INTERRUPT or QUIT is pressed:
Display I/O statistics for all active lunpaths every 10 seconds, and terminate after 5 successive readings:
Display I/O statistics for all active lunpaths every 10 seconds, also show terminal and processor statistics, and terminate after 5 succes-
sive readings:
WARNINGS
Users of must not rely on the exact field widths and spacing of its output, as these will vary depending on the system, the release of HP-
UX, and the data to be displayed.
AUTHOR
was developed by the University of California, Berkeley, and HP.
FILES SEE ALSO vmstat(1), ioscan(1M), intro(7).
iostat(1)