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Operating Systems HP-UX What is lvmkd and why does it slow my system down? Post 302147580 by Perderabo on Tuesday 27th of November 2007 06:16:39 PM
Old 11-27-2007
lvmkd is the logical volume manager kernel daemon and I would not try to kill it, but I doubt that a kill would succeed. If your disks were mirrored, why did you use dd? The logical volume should have been intact by using the other side of the mirror. When you replaced the disk, lvm had to sync it if it was mirrored and this syncing operation is proabably was is causing your load. One other thing to try is to check for OS patches to LVM. But this does sound like a resync. I think it's lvdisplay that will show you the status of a resync.
 

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volcheck(1)							   User Commands						       volcheck(1)

NAME
volcheck - checks for media in a drive and by default checks all floppy media SYNOPSIS
volcheck [-v] [-i secs] [-t secs] pathname DESCRIPTION
The volcheck utility tells volume management to look at each dev/pathname in sequence and determine if new media has been inserted in the drive. The default action is to volcheck all checkable media managed by volume management. OPTIONS
The following options are supported: -i secs Set the frequency of device checking to secs seconds. The default is 2 seconds. The minimum frequency is 1 second. -t secs Check the named device(s) for the next secs seconds. The maximum number of seconds allowed is 28800, which is 8 hours. The fre- quency of checking is specified by -i. There is no default total time. -v Verbose. OPERANDS
The following operands are supported: pathname The path name of a media device. EXAMPLES
Example 1 A sample of the volcheck command. The following example example% volcheck -v /dev/diskette /dev/diskette has media asks volume management to examine the floppy drive for new media. The following example example% volcheck -i 2 -t 600 /dev/diskette1 & asks volume management if there is a floppy in the floppy drive every 2 seconds for 600 seconds (10 minutes). FILES
/dev/volctl volume management control port ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWvolu | +-----------------------------+-----------------------------+ SEE ALSO
eject(1), rmmount(1M), attributes(5) WARNINGS
Due to a hardware limitation in many floppy drives, the act of checking for media causes mechanical action in the floppy drive. Continu- ous polling of the floppy drive will cause the drive to wear out. It is recommended that polling the drive only be performed during periods of high use. SunOS 5.11 28 Feb 2007 volcheck(1)
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