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Getting OT but... |
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Something I like with Raid1 is when I want to upgrade, update or |
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modify in any way the installation. I simply degrade the array right |
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before the modif so that I work on only one device (say sda1) and the |
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other (say sdb1) become the pre-modif backup. The the modification is |
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done at the normal speed of a single drive, not hammed by the slow |
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writes of the raid1, once done and tested I can re-add sdb1 and sync. |
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Or if there is any complication during the modif, you get the great |
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warm feeling of having a perfect backup in sdb1. =) |
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Simon |
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On Feb 7, 2008 7:31 AM, Rasmus Andersen <rasmus@×××××××××.dk> wrote: |
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> On Thu, Feb 07, 2008 at 06:50:57AM -0500, Simon Turner wrote: |
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> > Hi Rasmus, |
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> > you will first need to resize your md device. Using mdadm, that |
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> > would be done with --grow (check the man, `mdadm /dev/md123 --grow |
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> > --size=500G` should do the trick). |
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> |
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> Ah yes, thanks for that. For some reason I had not noted that use of |
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> --grow... mdadm /dev/md0 --grow --size=max did the trick nicely thanks. |
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> |
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> > But that will leave your filesystem intact at the current size, so |
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> > you'll have to resize the filesystem next. I know ext2&3 support |
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> > "growing" but I don't know about other filesystems. |
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> |
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> I use LVM(2) and ext3 so I am ok there. |
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> |
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> > However, since it's a simple raid one, you could create a new raid |
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> > device with one drive, format it at 500G, copy the stuff over from the |
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> > old raid1, drop the old raid1 device and add it to the new one. |
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> |
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> Yes, thats true. But since this is my root, var, home, etc etc that |
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> would require me to go to single-user mode for the duration of the copy. |
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> The resync-in-background is much nicer :) |
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> |
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> Thanks for your help. |
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> |
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> Cheers, |
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> |
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> Rasmus |
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> -- |
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> gentoo-user@l.g.o mailing list |
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> |
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> |
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-- |
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When Earth was the only inhabited planet in the Galaxy, it was a |
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primitive place, militarily speaking. The only weapon they had ever |
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invented worth mentioning was a crude and inefficient nuclear-reaction |
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bomb for which they had not even developed the logical defense. - |
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Asimov |
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-- |
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gentoo-user@l.g.o mailing list |
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