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On Thu, Apr 5, 2012 at 2:03 PM, Michael Mol <mikemol@×××××.com> wrote: |
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> On Thu, Apr 5, 2012 at 2:50 PM, Canek Peláez Valdés <caneko@×××××.com> wrote: |
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>> On Thu, Apr 5, 2012 at 1:32 PM, Joost Roeleveld <joost@××××××××.org> wrote: |
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>>> On Thursday, April 05, 2012 01:10:46 PM Canek Peláez Valdés wrote: |
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>>>> On Thu, Apr 5, 2012 at 2:47 AM, 张春江 <zhangchunjiangrj@×××.com> wrote: |
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>>>> 2. GRUB cannot read ext4 partitions (GRUB2 can), so you are reading |
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>>>> them as ext3 (I don't know if this can cause any problems). The reason |
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>>>> I started to use GRUB2 was because I wanted to use ext4 for my /. |
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>>> |
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>>> I don't think ext4 and ext3 use the same disk layout, eg. I don't think that |
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>>> can work. |
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>> |
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>> ext4 is fully backwards compatible with ext3, obviously; otherwise 张春江 |
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>> would not be able to boot his system. |
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> |
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> Not exactly. If you use them, ext4 adds structures and features which |
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> means the filesystem isn't liked by ext3-only code. I don't remember |
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> which these are, I just know I tended to accidentally enable them |
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> while tweaking filesystems with tune2fs. |
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|
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tune2fs -O extents,uninit_bg,dir_index |
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|
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which, again, obviously 张春江 hasn't set, otherwise either he wouldn't |
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be able to boot his system, or we had seen the warnings in his logs. |
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|
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Just as long as he doesn't use those new features, ext4 is fully |
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backwards compatible with ext3. |
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|
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Regards. |
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-- |
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Canek Peláez Valdés |
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Posgrado en Ciencia e Ingeniería de la Computación |
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Universidad Nacional Autónoma de México |