From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zoltan Szecsei Subject: mdadm raid6->LVM->ext4 setup Date: Tue, 16 Nov 2010 20:08:44 +0200 Message-ID: <4CE2C8AC.7010103@geograph.co.za> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, with the kind help from some of you on this list, I am finally=20 formatting the filesystem. I'd be grateful if any of you would like to comment on my chosen=20 chunk/stripe/stride/ etc values, as from tomorrow I will be loading TBs= =20 of 400MB images onto this system, so would prefer to be coerced into=20 making changes before then. Thanks & regards, Zoltan *** Setup: 8 * 5900RPM Seagte 2TB drives on SiI3132 PCIx x1 card. Linux gs0 2.6.32-25-generic #45-Ubuntu SMP Sat Oct 16 19:52:42 UTC 2010= =20 x86_64 GNU/Linux mdadm - v3.1.4 - 31st August 2010 LVM version: 2.02.54(1) (2009-10-26) Library version: 1.02.39 (2009-10-26) Driver version: 4.15.0 mke2fs 1.41.11 (14-Mar-2010) *** Commands used: mdadm --create /dev/md0 --metadata=3D1.2 --auto=3Dmd --assume-clean=20 --bitmap=3Dinternal --bitmap-chunk=3D131072 --chunk=3D512 --level=3D6=20 --raid-devices=3D8 /dev/sd[abcdefgh] mdadm --detail --scan >> /etc/mdadm.conf mdadm --assemble /dev/md0 pvcreate --metadatasize 512 /dev/md0 vgcreate geo_vg0 /dev/md0 lvcreate -n geo_lvm0 -l 100%FREE geo_vg0 mkfs -t ext4 -m 1-b 4096 -E stride=3D128,stripe-width=3D768=20 /dev/geo_vg0/geo_lvm0 *** Results: root@gs0:/home/geograph# mdadm -D /dev/md0 /dev/md0: Version : 1.2 Creation Time : Tue Nov 16 17:28:37 2010 Raid Level : raid6 Array Size : 11721077760 (11178.09 GiB 12002.38 GB) Used Dev Size : 1953512960 (1863.02 GiB 2000.40 GB) Raid Devices : 8 Total Devices : 8 Persistence : Superblock is persistent Intent Bitmap : Internal Update Time : Tue Nov 16 19:44:10 2010 State : active Active Devices : 8 Working Devices : 8 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 512K Name : gs0:0 (local to host gs0) UUID : c35e7642:7d78c385:61a26db1:89a5ace5 Events : 3 Number Major Minor RaidDevice State 0 8 0 0 active sync /dev/sda 1 8 16 1 active sync /dev/sdb 2 8 32 2 active sync /dev/sdc 3 8 48 3 active sync /dev/sdd 4 8 64 4 active sync /dev/sde 5 8 80 5 active sync /dev/sdf 6 8 96 6 active sync /dev/sdg 7 8 112 7 active sync /dev/sdh root@gs0:/home/geograph# ******************************************************************* root@gs0:/home/geograph# pvdisplay --- Physical volume --- PV Name /dev/md0 VG Name geo_vg0 PV Size 10.92 TiB / not usable 0 Allocatable yes (but full) PE Size 4.00 MiB Total PE 2861463 Free PE 0 Allocated PE 2861463 PV UUID oE4Itq-rAwe-RQzK-JTnn-XAVk-vObv-ORx5HO root@gs0:/home/geograph# vgdisplay --- Volume group --- VG Name geo_vg0 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 10.92 TiB PE Size 4.00 MiB Total PE 2861463 Alloc PE / Size 2861463 / 10.92 TiB Free PE / Size 0 / 0 VG UUID 0S3VyN-aMu4-U60o-hz3z-R6RL-hGUd-nJHCTg root@gs0:/home/geograph# lvdisplay --- Logical volume --- LV Name /dev/geo_vg0/geo_lvm0 VG Name geo_vg0 LV UUID dnhY9R-mGO3-oRg6-0EP7-i6kt-2dIW-R9028r LV Write Access read/write LV Status available # open 1 LV Size 10.92 TiB Current LE 2861463 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 12288 Block device 252:0 root@gs0:/home/geograph# ********************************************************* root@gs0:/home/geograph# echo `date` > zz_mkfs ; mkfs -t ext4 -m 1 -b=20 4096 -E stride=3D128,stripe-width=3D768 /dev/geo_vg0/geo_lvm0 ; echo `d= ate`=20 >> zz_mkfs mke2fs 1.41.11 (14-Mar-2010) =46ilesystem label=3D OS type: Linux Block size=3D4096 (log=3D2) =46ragment size=3D4096 (log=3D2) Stride=3D128 blocks, Stripe width=3D768 blocks 732536832 inodes, 2930138112 blocks 29301381 blocks (1.00%) reserved for the super user =46irst data block=3D0 Maximum filesystem blocks=3D4294967296 89421 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,= =20 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616,=20 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917= 632, 2560000000 [still running] --=20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Zoltan Szecsei PrGISc [PGP0031] Geograph (Pty) Ltd. P.O. Box 7, Muizenberg 7950, South Africa. 65 Main Road, Muizenberg 7945 Western Cape, South Africa. 34=B0 6'16.35"S 18=B028'5.62"E Tel: +27-21-7884897 Mobile: +27-83-6004028 =46ax: +27-86-6115323 www.geograph.co.za =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1153 / Virus Database: 424/3260 - Release Date: 11/16/10 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html