Messages in this thread | | | Date | Fri, 01 Apr 2011 16:13:56 +0200 | From | Mason <> | Subject | Re: ext2 large block size > page size |
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Hello again,
Mason wrote:
> As far as I can tell from a quick Google search, > there was a push in 2007 to add support for large > blocks in some file-systems, in particular ext2. > > e.g. cf. http://lwn.net/Articles/239090/
The page above describes one of the proposed patch, and the following article by Jonathan Corbet gives an overview of the issues.
http://lwn.net/Articles/232757/
> Was this ever accepted into the main line? > (It seems to have lived within -mm for a while) > > A few years later, I'm trying to mount a HDD > which was ext2-formatted with 32k blocks. > > And mount is failing (with a strange "block size > too small" error message). > > I'm trying this in Fedora 14 > 2.6.35.6 kernel > 1.41.12 e2fsprogs
To add insult to injury, Ext2Fsd(*) an ext2 IFS (Installable File System) for Windows, accepts large-block ext2 partitions.
(*) http://www.ext2fsd.com/
> Is the support for large blocks in ext2 not compiled in > this generic kernel ? Or was the patch never accepted ? > > I'm working with a ST Microelectronics set-top box. > Here are a few performance results for a 2TB USB HDD: > block size 4k : format = 151 s / mount = 242 s > block size 8k : format = 52 s / mount = 71 s > block size 16k : format = 30 s / mount = 36 s > block size 32k : format = 18 s / mount = 19 s > > Using 4kB blocks makes mount too slow on the STB, which > is why I'd like to use larger blocks. It would be nice > if the movies recorded on the STB could also be read on > a Linux PC.
Is there, perhaps, a better place to discuss this issue?
-- Regards, Mason
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