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SubjectRe: mkfs.xfs cannot make sector size 64 KiB?
Adding LKML to cc list.

On Sun, 29 Apr 2007, Justin Piszcz wrote:

>> From the manpage:
>
> -b Block size options.
>
> This option specifies the fundamental block size of the
> filesys-
> tem. The valid suboptions are: log=value and size=value;
> only
> one can be supplied. The block size is specified either as
> a
> base two logarithm value with log=, or in bytes with size=.
> The
> default value is 4096 bytes (4 KiB), the minimum is 512, and
> the
> maximum is 65536 (64 KiB). XFS on Linux currently only
> supports
> pagesize or smaller blocks.
>
> The maximum size is 64 KiB, yet it seems only up to 32 KiB is valid?
>
> I am running x86_64.
>
> $ uname -m
> x86_64
>
>
> p34:~# mkfs.xfs -b size=512 /dev/md3
> mkfs.xfs: /dev/md3 appears to contain an existing filesystem (xfs).
> mkfs.xfs: Use the -f option to force overwrite.
> p34:~# mkfs.xfs -b size=4096 /dev/md3
> mkfs.xfs: /dev/md3 appears to contain an existing filesystem (xfs).
> mkfs.xfs: Use the -f option to force overwrite.
> p34:~# mkfs.xfs -b size=8192 /dev/md3
> mkfs.xfs: /dev/md3 appears to contain an existing filesystem (xfs).
> mkfs.xfs: Use the -f option to force overwrite.
> p34:~# mkfs.xfs -b size=16384 /dev/md3
> mkfs.xfs: /dev/md3 appears to contain an existing filesystem (xfs).
> mkfs.xfs: Use the -f option to force overwrite.
> p34:~# mkfs.xfs -b size=32768 /dev/md3
> mkfs.xfs: /dev/md3 appears to contain an existing filesystem (xfs).
> mkfs.xfs: Use the -f option to force overwrite.
> p34:~# mkfs.xfs -b size=65536 /dev/md3
> illegal sector size 65536
> Usage: mkfs.xfs
> /* blocksize */ [-b log=n|size=num]
> /* data subvol */ [-d agcount=n,agsize=n,file,name=xxx,size=num,
> (sunit=value,swidth=value|su=num,sw=num),
> sectlog=n|sectsize=num,unwritten=0|1]
> /* inode size */ [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2]
> /* log subvol */ [-l agnum=n,internal,size=num,logdev=xxx,version=n
> sunit=value|su=num,sectlog=n|sectsize=num]
> /* label */ [-L label (maximum 12 characters)]
> /* naming */ [-n log=n|size=num,version=n]
> /* prototype file */ [-p fname]
> /* quiet */ [-q]
> /* realtime subvol */ [-r extsize=num,size=num,rtdev=xxx]
> /* sectorsize */ [-s log=n|size=num]
> /* version */ [-V]
> devicename
> <devicename> is required unless -d name=xxx is given.
> <num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
> xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
> <value> is xxx (512 byte blocks).
> p34:~#
>
> Unless, the page size is not <= 64 for x86_64?
>
> Justin.
>
>
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