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On Sun, 31 Jul 2011 04:40:33 +0300
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Samuli Suominen <ssuominen@g.o> wrote:
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> >> Can we discuss both options? |
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> > If there's any option that allows the use of a separate /usr |
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> > partition without an initramfs, then let's explore it. I don't feel |
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> > like having to use an initramfs just because I want a small / |
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> > without /usr on it. |
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> |
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> The message is really missing all the context without explanation for |
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> WHY you want it. |
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(As an interested non-developer)
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My own rationale is as follows:
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1. I do regular backups of /home. I would prefer to have them run in
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the background while I continue using the system, so the filesystem
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won't be idle. For consistency, that means I want /home in LVM, so I
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can create a snapshot and back that up instead—it will be at least as
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consistent as an instantaneous power failure would be, which things
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tend to be pretty good at recovering from (both the filesystem and
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anything above it that uses a journal of some sort, like sqlite).
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2. /home is big. /usr is big. When I first install a system, it's not
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clear exactly how big each one will be. It's really nice to be able to
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share space between them without any manual intervention, which is what
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happens if you put both on the same filesystem. Thus, if /home is in
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LVM, then /usr must also be in LVM, on the same LV.
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3. Booting with / on LVM requires an initramfs. It's much easier to not
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use an initramfs than to use one. So I keep / outside LVM as a small
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ordinary partition, typically ~250MB (no need for a separate /boot
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partition in this case).
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That said, I hadn't ever actually noticed that putting /usr on a
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separate filesystem was broken in the first place. It's served me well
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enough. I'd just like it if it would continue to do so. If I have no
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choice I suppose I will have to switch to using an initramfs, but I
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prefer not having to poke the early boot sequences of machines it's a
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PITA to get physical access to that have been working fine for years.
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Chris
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