Am 19.02.2013 20:24, schrieb Gordan Bobic: > On 19/02/2013 19:05, Reindl Harald wrote: >> >> >> Am 19.02.2013 20:02, schrieb Gordan Bobic: >>>> what exactly do you need to align on the partitions? >>> >>> For a start, making sure your RAID implementation puts the metadata >>> at the end of the disk, rather than the beginning. >> >> "my RAID implementation"? >> LINUX SOFTWARE RAID >> >> and this is how the raid-partitions are looking >> no problem since years >> >> Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors >> Units = sectors of 1 * 512 = 512 bytes >> Sector size (logical/physical): 512 bytes / 512 bytes >> I/O size (minimum/optimal): 512 bytes / 512 bytes >> Disk identifier: 0x0000ae2c >> Device Boot Start End Blocks Id System >> /dev/sda1 * 2048 1026047 512000 fd Linux raid autodetect >> /dev/sda2 1026048 31746047 15360000 fd Linux raid autodetect >> /dev/sda3 31746048 3906971647 1937612800 fd Linux raid autodetect >> >> [root@srv-rhsoft:/downloads]$ sfdisk -d /dev/sda >> # partition table of /dev/sda >> unit: sectors >> /dev/sda1 : start= 2048, size= 1024000, Id=fd, bootable >> /dev/sda2 : start= 1026048, size= 30720000, Id=fd >> /dev/sda3 : start= 31746048, size=3875225600, Id=fd >> /dev/sda4 : start= 0, size= 0, Id= 0 > > That's the MD partition alignment, not the alignment of the FS space within the MD device. The two are not the same. maybe you should read older posts in the thread [root@srv-rhsoft:/downloads]$ tune2fs -l /dev/md1 tune2fs 1.42.5 (29-Jul-2012) Filesystem volume name: system Last mounted on: / Filesystem UUID: b935b5db-0051-4f7f-83ac-6a6651fe0988 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: journal_data_writeback user_xattr acl nobarrier Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 1921360 Block count: 7679232 Reserved block count: 0 Free blocks: 5785905 Free inodes: 1728014 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1022 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8176 Inode blocks per group: 511 RAID stride: 128 RAID stripe width: 256 Flex block group size: 16 Filesystem created: Wed Jun 8 13:10:52 2011 Last mount time: Fri Feb 15 20:27:01 2013 Last write time: Fri Feb 15 20:26:59 2013 Mount count: 7 Maximum mount count: -1 Last checked: Tue Feb 5 10:23:45 2013 Check interval: 31104000 (12 months) Next check after: Fri Jan 31 10:23:45 2014 Lifetime writes: 1279 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 1308180 Default directory hash: half_md4 Directory Hash Seed: d48fdbd1-5e0c-4dc8-8d0b-7e3c0d6c1e18 Journal backup: inode blocks [root@srv-rhsoft:/downloads]$ tune2fs -l /dev/md2 tune2fs 1.42.5 (29-Jul-2012) Filesystem volume name: data Last mounted on: /tmp Filesystem UUID: 1abf071b-0c78-4b82-bb21-b3dfb269afa8 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: journal_data_writeback user_xattr acl nobarrier Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 242204672 Block count: 968805632 Reserved block count: 0 Free blocks: 524215841 Free inodes: 241237943 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 793 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stride: 128 RAID stripe width: 256 Flex block group size: 16 Filesystem created: Wed Jun 8 13:10:56 2011 Last mount time: Fri Feb 15 20:27:03 2013 Last write time: Fri Feb 15 20:27:03 2013 Mount count: 7 Maximum mount count: -1 Last checked: Tue Feb 5 10:23:53 2013 Check interval: 31104000 (12 months) Next check after: Fri Jan 31 10:23:53 2014 Lifetime writes: 44 TB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 52691565 Default directory hash: half_md4 Directory Hash Seed: 656f345f-ec1f-4281-82fb-58809a18dad2 Journal backup: inode blocks
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