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On Sun, 22 Mar 2009 22:35:35 +0200 |
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Alan McKinnon <alan.mckinnon@×××××.com> wrote: |
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> On Sunday 22 March 2009 22:15:14 Momesso Andrea wrote: |
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> > My current setup is: |
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> > |
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> > Device Boot Start End Blocks Id System |
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> > /dev/sda1 * 1 2894 23246023+ 83 Linux |
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> > /dev/sda2 2895 3381 3911827+ 82 Linux |
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> > swap /Solaris |
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> > /dev/sda3 3382 24804 172080247+ 83 Linux |
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> > /dev/sda4 24805 30401 44957902+ 83 Linux |
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> > |
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> > where sda3 is an lvm volume and sda4 is free space. |
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> > |
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> > I'd like to to merge sda3 and sda4 into a single partition without |
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> > losing the data on it, but I'm not sure if it is possible. |
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> > |
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> > My guess is that I can use fdisk to delete sda4 and sda3, create a |
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> > sda3 partition starting at 3382 and ending at 30401, then use |
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> > pvresize to enlarge it. |
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> |
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> Correct. That's all there is to it. |
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> |
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> > This is from man pvresize: |
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> > "Expand the PV on /dev/sda1 after enlarging the partition with |
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> > fdisk: pvresize /dev/sda1" |
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> > |
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> > Is that going to work or I'm going to lose all the data? |
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> |
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> Your data is safe if you do exactly the steps you said above. |
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Good to know! In any case backups are available, but I prefer not to |
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use them if not necessary. |
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|
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> |
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> Caveat: I have no idea why this doesn't work, but if you make sda4 an |
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> extended partition and create sda5 as a logical with exactly the same |
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> start and end as you describe above, you do in fact lose all data. |
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> Obviously there is a difference between a physical and a logical |
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> partition with the same location, but I don't know why this is. |
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> |
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> Which is a pity, as 4 logical partitions is a little too |
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> constrictive, I prefer the extra freedom to move things around with |
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> extended partitions. |
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> |
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> > P.S. I'm not using vgextend to simply add sda4 to the lvm because I |
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> > might want to migrate my root (sda1) to ext4, and to do so I will |
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> > need to split it in two separate partitions (/boot using ext3 and / |
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> > using ext4). This way I'm not going to need extended partitions. |
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> |
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> ext3 on /boot is pointless. The ext3 metadata takes up a considerable |
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> chunk of the space on a typical /boot, for no good reason at all - |
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> writes to it are exceptionally rare so there's no real-worlld benefit |
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> to the journal. |
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> |
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> Ext2 is ideal for /boot. |
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> |
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Thanks for the advice. Will be a problem for lvm if I add a partition |
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before it? I mean, will I need to change any config files while lvm is |
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gonna reside on sda4 instead of sda3? |
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--- |
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TopperH |
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http://topperh.blogspot.com |
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