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тАО01-21-2009 05:09 AM
тАО01-21-2009 05:09 AM
How did you setup up your lock disk ?
I was forced to mark the partition as type: 83 or Linux.
But, I have multipathd daemon and would prefer *not* to use fdisk command on a device /dev/sdo and marking type 83.
I prefer to use a multipathd's /dev/mapper/mpath# name instead of fdisk'ing a pseudo device named: /dev/sXX.
And, when I fdisk /dev/sXX, it then creates a 'p1' name suffix on /dev/mapper/mpath0p1.
Guess I don't understand why MC/SG can not use a standard named: /dev/mapper/mpath0 without a tag of 83 on a /dev/sXX device.
any comments?
I was forced to mark the partition as type: 83 or Linux.
But, I have multipathd daemon and would prefer *not* to use fdisk command on a device /dev/sdo and marking type 83.
I prefer to use a multipathd's /dev/mapper/mpath# name instead of fdisk'ing a pseudo device named: /dev/sXX.
And, when I fdisk /dev/sXX, it then creates a 'p1' name suffix on /dev/mapper/mpath0p1.
Guess I don't understand why MC/SG can not use a standard named: /dev/mapper/mpath0 without a tag of 83 on a /dev/sXX device.
any comments?
Golf is a Good Walk Spoiled, Mark Twain.
Solved! Go to Solution.
2 REPLIES 2
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тАО01-21-2009 01:14 PM
тАО01-21-2009 01:14 PM
Re: lock disk with Multipathd
Shalom,
Might want to configure your lock disk to be in LVM.
SEP
Might want to configure your lock disk to be in LVM.
SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО01-22-2009 02:29 PM
тАО01-22-2009 02:29 PM
Solution
Assuming you are referring to a Linux configuration (this forum) then there is no LVM support of Lock LUN. One reason we use that terminology is to differentiate it from the HP-UX version.
The certification matrix (ftp://ftp.compaq.com/pub/products/servers/ha/linux/SGLX_Certification_Matrix.pdf) describes how you can use DM-MPIO with Lock LUN. Check the notes.
The reason has to do with the fact that Linux is a moving target and SGLX has been committed to backward compatibility and rolling upgrades. DM-MPIO is a relatively new feature while LockLUN has existed since nearly the first release of SGLX about 7 years ago. At that time the "83" partition type was required for some technical reasons.
The changes you describe require more thought and effort than you might think at first glance.
The certification matrix (ftp://ftp.compaq.com/pub/products/servers/ha/linux/SGLX_Certification_Matrix.pdf) describes how you can use DM-MPIO with Lock LUN. Check the notes.
The reason has to do with the fact that Linux is a moving target and SGLX has been committed to backward compatibility and rolling upgrades. DM-MPIO is a relatively new feature while LockLUN has existed since nearly the first release of SGLX about 7 years ago. At that time the "83" partition type was required for some technical reasons.
The changes you describe require more thought and effort than you might think at first glance.
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