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On Thu, 2009-06-04 at 13:01 -0600, Maxim Wexler wrote: |
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> Hi group, |
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> |
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> Creating LVM partitions on SSD and SD card using systemrescuecd-1.2.0 |
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> while following doc, 'Gentoo LVM2 installation'. In the doc it says |
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> to edit the 'filter =' statement in lvm.conf in order to scan the |
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> correct devices. But just below it says to use #pvcreate with the |
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> appropriate devices. But if you use pvcreate to specify the device |
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> you're planning to partition what's the point in editing lvm.conf? |
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> Edited it anyways. |
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> |
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> Now have: |
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> ... |
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> filter= [ "r|/dev/ndb.*|", "a|/dev/sd[ab]|" ] # only changed 'accept' line |
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> ... |
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> |
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> /root % vgscan |
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> Reading all physical volumes. This may take a while... |
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> |
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> Well, no, it was more or less instant. There was no further output and |
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> the prompt reappeared. Does this mean everything is cool or that |
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> vgscan found nothing? |
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> |
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You still need pvcreate to create PVs. What the filter parameter is for |
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is for when LVM scans for PVs. Basically pvcreate puts a header on the |
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device so that vgscan and friends knows that it's a PV. It may be |
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undesirable to scan some devices (e.g. optical drives) for PVs. |
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Having said that, usually the defaults for filter and exclude are fine |
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and you don't need to play with them (as is the case for many defaults). |
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You'll know if LVM has detected your PVs by running pvdisplay. If your |
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PV doesn't show up either a: you didn't pvcreate it or b: it didn't get |
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scanned due to your filter or exclude params. |
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|
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-a |
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