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Get to know Ubuntu's Logical Volume Manager

Posted by: Anonymous [ip:] on August 01, 2008 01:46 PM
I love lvm, it brings a whole new set of possibilities to disk management. Most Unixes use it these days, AIX, HP-UX, Solaris, so getting to know it or at least its concepts is definitely useful if you are looking for a UNIX admin position somewhere. LVM2 on linux is based on HP's LVM implimentation, but there are definite differences in the way that it works. I am an HP-UX admin and I have trouble understanding why you can export a volume group why it is still active in linux and why you still see it after you do?!?
Also the mirroring implimentation isn't fully there yet, you can only create a mirrored LV when you first create it, not vgextend it in as it is not supported yet. This sucks for me, because this is used on all of our HP-UX implimentations, and it also means that I can't break the mirror, reduce out a disk and then recreate it after.

I think Linux LVM has some way to go before it can actually be used in a data center.


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