From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Janos Haar" Subject: Re: RAID0 size bug (?) Date: Sat, 9 Oct 2010 21:09:16 +0200 Message-ID: <0c3201cb67e5$7b064010$0400a8c0@dcccs> References: <0a7401cb673c$12820280$0400a8c0@dcccs> <20101009104516.129c60e2@notabene> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids ----- Original Message ----- From: "Neil Brown" To: "Janos Haar" Cc: Sent: Saturday, October 09, 2010 1:45 AM Subject: Re: RAID0 size bug (?) > On Sat, 9 Oct 2010 00:56:38 +0200 > "Janos Haar" wrote: > >> Hello list, >> >> Maybe a known old bug, but i don't know. >> >> The size is wrong of the md8: >> >> [root@UNISTORE ~]# fdisk -l /dev/sdh >> >> Disk /dev/sdh: 750.1 GB, 750156374016 bytes > ^^^^^^^^^ >> 255 heads, 63 sectors/track, 91201 cylinders >> Units = cylinders of 16065 * 512 = 8225280 bytes > > So 750GB > >> >> Disk /dev/sdh doesn't contain a valid partition table >> [root@UNISTORE ~]# fdisk -l /dev/sdf >> >> Disk /dev/sdf: 500.1 GB, 500107862016 bytes > ^^^^^^^^^ >> 255 heads, 63 sectors/track, 60801 cylinders >> Units = cylinders of 16065 * 512 = 8225280 bytes > > This one is 500GB > > >> >> Disk /dev/sdf doesn't contain a valid partition table >> [root@UNISTORE ~]# mdadm --detail /dev/md8 >> /dev/md8: >> Version : 00.90.03 >> Creation Time : Sat Oct 9 06:36:36 2010 >> Raid Level : raid0 >> Array Size : 1220961088 (1164.40 GiB 1250.26 GB) > ^^^^^^^^^^^ > > 750GB + 500GB == 1250 GB > > So what is your problem? Shouldn't be 2x500GB? ...because this is stripe, not linear array. :-) I mean should be used the smallest drive's size, no? > > NeilBrown > > >> Raid Devices : 2 >> Total Devices : 2 >> Preferred Minor : 8 >> Persistence : Superblock is not persistent >> >> Update Time : Sat Oct 9 06:36:36 2010 >> State : clean >> Active Devices : 2 >> Working Devices : 2 >> Failed Devices : 0 >> Spare Devices : 0 >> >> Chunk Size : 64K >> >> Number Major Minor RaidDevice State >> 0 8 112 0 active sync /dev/sdh >> 1 8 80 1 active sync /dev/sdf >> [root@UNISTORE ~]# >> [root@UNISTORE ~]# uname -a >> Linux UNISTORE 2.6.28.10 #5 SMP Fri Jan 29 07:40:35 CET 2010 x86_64 >> x86_64 >> x86_64 GNU/Linux >> [root@UNISTORE ~]# mdadm -V >> mdadm - v2.5.4 - 13 October 2006 >> [root@UNISTORE ~]# >> >> >> Cheers, >> Janos >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html