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тАО08-20-2004 09:12 AM - last edited on тАО03-10-2014 09:59 PM by Lisa198503
тАО08-20-2004 09:12 AM - last edited on тАО03-10-2014 09:59 PM by Lisa198503
Hello All,
My knowledge on disk layouts is minimal. Can someone point me to the right direction where I can find more information on that.
I am working on a performance issue trying to resolve slow load times on a HP server.
Eg: c10t0d0 is one of the devices where there is a high avwait(average of 150) and avserv (avg of 27).
How can I find out what file system is mounted on the device c10t0d0?
How do I map the disk labels to the actual mount points ??
Can someone please help?
P.S. This thread has been moved from Disk to HP-UX > sysadmin. -HP Forum Moderator
Solved! Go to Solution.
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тАО08-20-2004 04:51 PM
тАО08-20-2004 04:51 PM
SolutionYou can use this command
#strings /etc/lvmtab
This will give you the name of the
Volume group to which the disk is associated with & then use:
#bdf
This will give you the information as to which logical volume your file system is mounted & also to which Volume group this filesystem belongs.
So, now you have the information as to
which filesystem is the disk associated with.
As far as Disk I/O testing is considered
1)You use iostat command this will give you the exact throughput of the disk in Mbps
( see man iostat for details)
2)Also use sar -d 5 10 (e.g.)
command to see the disk i/o per 5 seconds
and 10 times.
( see man sar for details)
For all these information pls refer :
http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5187-2216/5187-2216_top.html&con=/hpux/onlinedocs/5187-2216/00/00/53-con.html&toc=/hpux/onlinedocs/5187-2216/00/00/53-toc.html&searchterms=LVM&queryid=20040820-224652
Regards,
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тАО08-23-2004 05:59 AM
тАО08-23-2004 05:59 AM
Re: Disk IO
I have collected some stats using sar -d
Attached are the averages. Do you see something wrong??
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тАО08-23-2004 07:03 PM
тАО08-23-2004 07:03 PM
Re: Disk IO
If you are using LVM you can use
#pvdisplay -v /dev/dsk/c10t0d0
this will give you information about Volumes located on this disk and then you can find out the File system name by checking it with /etc/fstab file.
Sunil