From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?BERTRAND_Jo=EBl?= Subject: Partitionable raid array... How to create devices ? Date: Tue, 16 Oct 2007 10:22:46 +0200 Message-ID: <471474D6.5090704@systella.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello, I use software raid for a long time without any trouble. Today, I have to install a partitionable raid1 array over iSCSI. I have some questions because I don't understand how make this kind of array. I have a sparc64 (T1000) with a JBOD (U320 SCSI) that runs a 2.6.23 linux kernel and debian testing distribution. /dev/sda : internal SAS drive -> OS /dev/sdb : internal SAS drive -> OS I have made on /dev/sda and /dev/sdb seven raid1 volumes (non partitionables arrays). /dev/sd[c-h] : external U320 drives. Each 300 GB drive only contains one "type fd" partition. I have tried to create a partitionable array with : Root gershwin:[/usr/src/linux-2.6.23] > mdadm -C /dev/mdp0 -l5 --auto=mdp4 -n6 /dev/sd[c-h]1 Root gershwin:[/dev] > ls -l md* brw-rw---- 1 root disk 9, 0 Oct 15 10:29 md0 brw-rw---- 1 root disk 9, 1 Oct 15 10:29 md1 brw-rw---- 1 root disk 9, 127 Oct 16 09:59 md127 brw-rw---- 1 root disk 9, 2 Oct 15 10:29 md2 brw-rw---- 1 root disk 9, 3 Oct 15 10:29 md3 brw-rw---- 1 root disk 9, 4 Oct 15 10:29 md4 brw-rw---- 1 root disk 9, 5 Oct 15 10:29 md5 brw-rw---- 1 root disk 9, 6 Oct 15 10:29 md6 brw-rw---- 1 root disk 9, 7 Oct 15 10:29 md7 brw-rw---- 1 root disk 9, 8 Oct 15 10:29 md8 crw-rw---- 1 root root 10, 63 Oct 15 10:29 mdesc brw-rw---- 1 root disk 9, 127 Oct 16 10:03 mdp0 md: total 0 brw-rw---- 1 root disk 9, 7 Oct 15 10:29 7 brw-rw---- 1 root disk 9, 8 Oct 15 10:29 8 Root gershwin:[/dev] > cat /proc/mdstat Personalities : [raid1] [raid6] [raid5] [raid4] md127 : active raid5 sdh1[6] sdg1[4] sdf1[3] sde1[2] sdd1[1] sdc1[0] 1464725760 blocks level 5, 64k chunk, algorithm 2 [6/5] [UUUUU_] [==>..................] recovery = 12.6% (37043392/292945152) finish=127.5min speed=33440K/sec md6 : active raid1 sda1[0] sdb1[1] 7815552 blocks [2/2] [UU] md5 : active raid1 sda8[0] sdb8[1] 14538752 blocks [2/2] [UU] md4 : active raid1 sda7[0] sdb7[1] 4883648 blocks [2/2] [UU] md3 : active raid1 sda6[0] sdb6[1] 9767424 blocks [2/2] [UU] md2 : active raid1 sda5[0] sdb5[1] 29294400 blocks [2/2] [UU] md1 : active raid1 sda2[0] sdb2[1] 489856 blocks [2/2] [UU] md0 : active raid1 sdb4[1] sda4[0] 4883648 blocks [2/2] [UU] unused devices: Root gershwin:[/dev] > Well, /dev/mdp0 is created. But what's about /dev/mdp0p1 ? I believe that mdadm has to create required devices. I don't understand where is my mistake. Any idea ? Regards, JKB