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Force 4K blocksize when testing ext2 on zvol.

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Currently, mkfs.ext2 on zconfig.sh zvols tries to use a 8K blocksize,
probably because by default zvol exposes an optimal I/O size of 8K.

Unfortunately, a ext2 blocksize of 8K is not supported by the kernel,
so the resulting filesystem is unmountable.

This patch fixes the issue by making sure the blocksize is 4K. We have
to use -F to force it else mkfs.ext2 won't allow us to use a blocksize
smaller than the optimal I/O size.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #979
This commit is contained in:
Etienne Dechamps 2012-09-20 12:00:50 +02:00 committed by Brian Behlendorf
parent 393b44c711
commit 2f342404c1
1 changed files with 3 additions and 1 deletions
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4
scripts/common.sh.in
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@ -342,7 +342,9 @@ format() {
local DEVICE=$1
local FSTYPE=$2
/sbin/mkfs.${FSTYPE} -q ${DEVICE} || return 1
# Force 4K blocksize, else mkfs.ext2 tries to use 8K, which
# won't mount
/sbin/mkfs.${FSTYPE} -b 4096 -F -q ${DEVICE} || return 1
return 0
}