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On Thursday, November 17, 2011 10:43:28 AM Florian Philipp wrote: |
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> Am 17.11.2011 07:50, schrieb Dale: |
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> [...] |
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> |
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> > One more question. I have two drives. A 250Gb and a 750Gb. Originally |
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> > the data was on the 750Gb drive. I set the 250Gb up on LVM then moved |
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> > things over from the 750Gb. I then added the 750Gb to the VG and |
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> > resized the file system. So, in theory the data is on the 250Gb drive. |
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> > Let's say I want to remove the 250Gb drive. I would use pvmove to do |
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> > that right? When I ran pvmove /dev/sdb, which is the 250Gb drive, then |
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> > it would remove all the data from that drive so that it could be |
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> > removed. Am I close? |
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> > |
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> > I'm not planning to do that but just wanting to get a better |
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> > understanding of this LVM thing. |
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> > |
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> > Dale |
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> |
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> Yes, that is correct. It moves the data by mirroring it temporarily on |
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> the new location before updating the metadata so that only the new |
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> location is used. Therefore you can safely reboot or abort operations. |
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Also, this will only work if the VG has sufficient unused space (eg. not used |
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by LVs) on the other disk(s) to accomodate the data moved. |
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Joost |