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author | delphij <delphij@FreeBSD.org> | 2005-02-20 06:33:18 +0000 |
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committer | delphij <delphij@FreeBSD.org> | 2005-02-20 06:33:18 +0000 |
commit | eba8271ca01f0817e7a286a4679d21a5291f5f00 (patch) | |
tree | 97785c61073473b9941980736d2f7526fae29734 /sbin | |
parent | aa96e34a9c91b1e904da6b6948a04d46adb8f15d (diff) | |
download | FreeBSD-src-eba8271ca01f0817e7a286a4679d21a5291f5f00.zip FreeBSD-src-eba8271ca01f0817e7a286a4679d21a5291f5f00.tar.gz |
When creating a new FFS file system, the block size will indirectly
affect the largest file size that is allowed by the file system.
On the other hand, when creating a snapshot, the snapshot file will
appear as it is as big as the file system itself. Hence we will not
be able to create a file system on large file systems with small
block sizes.
Add a warning about this, and gives some hints to correct the issue.
Reviewed by: mckusick
MFC After: 1 week
Diffstat (limited to 'sbin')
-rw-r--r-- | sbin/newfs/mkfs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sbin/newfs/mkfs.c b/sbin/newfs/mkfs.c index b796aef..0b653d5 100644 --- a/sbin/newfs/mkfs.c +++ b/sbin/newfs/mkfs.c @@ -280,6 +280,16 @@ mkfs(struct partition *pp, char *fsys) sizepb *= NINDIR(&sblock); sblock.fs_maxfilesize += sizepb; } + + /* + * It's impossible to create a snapshot in case that fs_maxfilesize + * is smaller than the fssize. + */ + if (sblock.fs_maxfilesize < (u_quad_t)fssize) { + warnx("WARNING: You will be unable to create snapshots on this " + "file system. Correct by using a larger blocksize."); + } + /* * Calculate the number of blocks to put into each cylinder group. * |