Hi,we have Centos 5.4 server and according to me we have strange problem.
Disk size and other indormation like below.Normally,md2 partition should have 46GB free disk size but available value is zero.Why it show zero ? If you help me,I will be happy.
df -h
Filesystem Size Used Avail Use% Mounted on /dev/md1 19G 2.1G 16G 12% / /dev/md2 880G 834G 0 100% /data /dev/md0 243M 24M 208M 11% /boot tmpfs 2.0G 0 2.0G 0% /dev/shm
df -k
Filesystem 1K-blocks Used Available Use% Mounted on /dev/md1 19840804 2215556 16601112 12% / /dev/md2 922019416 874435436 0 100% /data /dev/md0 248783 23904 212035 11% /boot tmpfs 2057656 0 2057656 0% /dev/shm
df -i
Filesystem Inodes IUsed IFree IUse% Mounted on /dev/md1 5124480 44654 5079826 1% / /dev/md2 237961216 42010 237919201 1% /data /dev/md0 64256 45 64211 1% /boot tmpfs 514414 1 514413 1% /dev/shm
mdadm --detail /dev/md2
/dev/md2: Version : 0.90 Creation Time : Mon Jun 8 18:14:31 2009 Raid Level : raid1 Array Size : 951827072 (907.73 GiB 974.67 GB) Used Dev Size : 951827072 (907.73 GiB 974.67 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent
Update Time : Wed Aug 18 10:01:27 2010 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0
UUID : a0bf9972:b46617a2:bf37d07b:5d34b930 Events : 0.51
Number Major Minor RaidDevice State 0 8 2 0 active sync /dev/sda2 1 8 18 1 active sync /dev/sdb2
Semih, On 18/08/10 08:18, Semih Gokalp wrote:
Disk size and other indormation like below.Normally,md2 partition should have 46GB free disk size but available value is zero.Why it show zero ? If you help me,I will be happy.
5% space is reserved. This can be modified during formatting with mkfs.ext3 during format time or later with tune2fs command.
From tune2fs's man:
-m reserved-blocks-percentage Set the percentage of the filesystem which may only be allocated by privileged processes. Reserving some number of filesystem blocks for use by privileged processes is done to avoid filesystem fragmenta‐ tion, and to allow system daemons, such as syslogd(8), to continue to function correctly after non- privileged processes are prevented from writing to the filesystem. Normally, the default percentage of reserved blocks is 5%.
On Wed, 18 Aug 2010 10:18:39 +0300 Semih Gokalp semihgokalp@gmail.com wrote:
Hi,we have Centos 5.4 server and according to me we have strange problem.
Disk size and other indormation like below.Normally,md2 partition should have 46GB free disk size but available value is zero.Why it show zero ? If you help me,I will be happy.
<snip> Answer is probably in reserved blocks for root. See tune2fs -m option. HTH,
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Hakan Koseoglu -
Laurent Wandrebeck -
Semih Gokalp