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Philip Webb schrieb: |
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> Does anyone have advice based on experience using LVM ? |
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> I sb partitioning a new 320 GB hard drive soon for a simple desktop box. |
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> That is 8 times the size of the HDD in my present machine, |
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> which I haven't exhausted by any means. LVM seems more professional |
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> & allows flexibility for unforeseen storage needs, |
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> but it adds a layer of complexity & potential problems arising therefrom. |
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> I wonder whether LVM slows down disk access |
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> & whether there's a disaster lurking unseen if anything goes wrong with LVM: |
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> a bad package update, a damaged config file or file storing LVM's layout |
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> would seem to risk losing everything on the HDD & require re-installation. |
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> |
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Simple pros and cons? |
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Pro: |
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More flexible, especially when using a special setup [1], can easily be |
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expanded to RAID1 and/or RAID0 (even both at the same time!). |
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|
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Cons: |
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- Can't be used with Windows. Even worse, Windows sees the partition as |
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unformatted rather than unknown and therefore might have no problem |
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formatting it without warning. |
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- Can't be used for /boot, usage for / needs initrd (my advice: keep |
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/boot, /bin, /sbin and /etc on a normal partition). |
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- It's one more thing that can break. |
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- You can't use *parted to resize the underlying partitions. |
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- I had trouble mounting my lvm /home partition (mirrored) with Ubuntu, |
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possibly a missing kernel module in the default kernel or missing use |
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flag. I didn't try to fix it, though. |
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- You loose bit performance, but not much, you won't feel it without |
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benchmarks. |
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|
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[1] |
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Some simple advices: Create small logical volumes. It's easier to expand |
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them than to shrink them (expanding reiserfs takes less than 5 minutes). |
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If you are not shure wether you might need more space on ordinary dos |
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partitions later on, don't create one big partition for lvm but several |
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smaller. That makes management a bit more complicated (especially when |
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you are unfamiliar with the tools and/ or have several physical disks) |
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but you can simply reformat one of them if the need arises (see "man |
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pvmove" for more information). |
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-- |
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