on 12/30/2008 09:44 AM, Shen Feng wrote: > Hi, > > I create a raid-1 btrfs with the following command. > > [r...@localhost ~]# fdisk -l /dev/sdb > > Disk /dev/sdb: 320.0 GB, 320072933376 bytes > 255 heads, 63 sectors/track, 38913 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0xb44829ea > > Device Boot Start End Blocks Id System > /dev/sdb1 1 4863 39062016 83 Linux > /dev/sdb2 4864 9726 39062047+ 83 Linux > /dev/sdb3 9727 38905 234375905+ f W95 Ext'd (LBA) > /dev/sdb5 9727 14590 39063374 83 Linux > /dev/sdb6 14590 19453 39068690+ 7 HPFS/NTFS > /dev/sdb7 19454 29178 78116031 83 Linux > /dev/sdb8 29179 31610 19535008+ 83 Linux > /dev/sdb9 31611 34041 19526976 83 Linux > /dev/sdb10 34042 36473 19535008+ 83 Linux > /dev/sdb11 36474 38904 19526976 83 Linux > > [r...@localhost ~]# mkfs.btrfs -m raid1 /dev/sdb8 /dev/sdb9 /dev/sdb10 > /dev/sdb11 > adding device /dev/sdb9 id 2 > adding device /dev/sdb10 id 3 > adding device /dev/sdb11 id 4 > fs created label (null) on /dev/sdb8 > nodesize 4096 leafsize 4096 sectorsize 4096 size 74.50GB > Btrfs v0.16-29-g0d53b21 > > [r...@localhost ~]# mount -t btrfs /dev/sdb8 /mnt/btrfs[r...@localhost ~]# df > Filesystem 1K-blocks Used Available Use% Mounted on > ... > /dev/sdb8 78123968 28 78123940 1% /mnt/btrfs >
More test: [r...@localhost btrfs]# df -h /dev/sdb8 Filesystem Size Used Avail Use% Mounted on /dev/sdb8 75G 28K 75G 1% /mnt/btrfs [r...@localhost btrfs]# dd if=/dev/zero of=/mnt/btrfs/file bs=1024 count=1024 1024+0 records in 1024+0 records out 1048576 bytes (1.0 MB) copied, 0.0481317 s, 21.8 MB/s [r...@localhost btrfs]# sync [r...@localhost btrfs]# df -h /dev/sdb8 Filesystem Size Used Avail Use% Mounted on /dev/sdb8 75G 1.1M 75G 1% /mnt/btrfs With raid-1, the used space may be double (about 2.2M), I think. > I think the partition size is no correct since this is a raid-1 partition. > The size should be half. > Is this a bug? > > -Shen > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- Best Regards, -------------------------------------------------- Shen Feng Development Dept.I Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST) 8/F., Civil Defense Building, No.189 Guangzhou Road, Nanjing, 210029, China PHONE: +86-25-86630566-950 COINS: 79955-950 FAX: +86-25-83317685 MAIL: s...@cn.fujitsu.com ------------------------------------------------- This communication is for use by the intended recipient(s) only and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you are not an intended recipient of this communication, you are hereby notified that any dissemination, distribution or copying hereof is strictly prohibited. If you have received this communication in error, please notify me by reply e-mail, permanently delete this communication from your system, and destroy any hard copies you may have printed. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
