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    DateWed, 14 Nov 2001 14:33:07 -0800 (PST)
    FromScott Laird <>
    SubjectRe: blocks or KB? (was: .. current meaning of blk_size array)
    
    On Wed, 14 Nov 2001, Benjamin LaHaise wrote:
    >
    > On Wed, Nov 14, 2001 at 02:16:39PM -0700, Andreas Dilger wrote:
    > > Well, the rumor is wrong.  There has always been a single-device 1TB/2TB
    > > limit in the kernel (2^31 or 2^32 * 512 byte sector size), and until
    > > recently it has not been a problem.  To remove the problem Jens Axboe
    > > (I think, or Ben LaHaise, can't remember) has a patch to support 64-bit
    > > block counts and has been tested with > 2TB devices.
    >
    > It was tested with a 10TB loopback raid, not a real device.  Strangly,
    > nobody made any effort to test on real physical hardware (or offer any
    > hardware for me to test on ;-).  The patch was against ~2.4.6 and will
    > need to get dusted off again soon.
    >
    
    Interesting.  I have a couple 14x 100GB IDE boxes scheduled to show
    up next week.  If I can get a patch for a reasonably recent kernel, I
    could do a few tests on a ~1.2 GB FS, and maybe on one a bit bigger.
    
    Once 160GB drives start shipping, it should be possible to make a 2TB
    software RAID5 box in a 4U case for around $7k.
    
    Interesting question: does Linux have problems with large NFS imports?
    
    
    Scott
    
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