Re: [CentOS] Problem resizing partition of nfs volume
On 08/12/10 2:56 PM, Dan Yamins wrote: Hi: I have an NFS volume that I'm trying to resize a partition on. Something about the fdisk process is corrupting something on the drive Before running fdisk, I can mount the volume find: $ mount /dev/sdo1 /home ... and the volume is mounted fine. And, $ e2fsck -f /dev/sdo1 /dev/sdo1: clean, ... But then I run fdisk to rewrite the partition table of this drive, to expand the /dev/sdo1 partition w/o losing data: $ fdisk /dev/sdo # Type 'd' to delete the primary partition # Type 'n' for new partition # Type 'p' for primary # Type '1' for 1st # Type Enter for 1st cylinder # Type Enter for last cylinder (full disk) # Type 'w' to finish Calling ioctl() ... Syncing disks ... But then something has gone wrong. $ e2fsck -f /dev/sdo1 e2fsck 1.39 (29-May-2006) Couldn't find ext2 superblock, trying backup blocks... e2fsck: Bad magic number in super-block while trying to open /dev/sdm1 ... And I can't mount the volume any more: $ mount /dev/sdo1 /home mount: you must specify the filesystem type What am I doing wrong? Am I missing a step of the process? yeah, you deleted your file system, then created a new empty partition. instead, you should have used parted(8) or similar to expand the partition, then used resize2fs(8) to expand the file system on this partition to its new size. me, I'd strongly suggest doing a full backup of the partition first with dump(8) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
cuak David Véjar Soporte y Redes Ferretería Santiago Soluciones de Abastecimiento Lira 919 Santiago, Chile Fono: (56 2) 731 3824 www.ferreteriasantiago.cl -Mensaje original- De: centos-boun...@centos.org [mailto:centos-boun...@centos.org] En nombre de John R Pierce Enviado el: jueves, 12 de agosto de 2010 18:22 Para: CentOS mailing list Asunto: Re: [CentOS] Problem resizing partition of nfs volume On 08/12/10 2:56 PM, Dan Yamins wrote: Hi: I have an NFS volume that I'm trying to resize a partition on. Something about the fdisk process is corrupting something on the drive Before running fdisk, I can mount the volume find: $ mount /dev/sdo1 /home ... and the volume is mounted fine. And, $ e2fsck -f /dev/sdo1 /dev/sdo1: clean, ... But then I run fdisk to rewrite the partition table of this drive, to expand the /dev/sdo1 partition w/o losing data: $ fdisk /dev/sdo # Type 'd' to delete the primary partition # Type 'n' for new partition # Type 'p' for primary # Type '1' for 1st # Type Enter for 1st cylinder # Type Enter for last cylinder (full disk) # Type 'w' to finish Calling ioctl() ... Syncing disks ... But then something has gone wrong. $ e2fsck -f /dev/sdo1 e2fsck 1.39 (29-May-2006) Couldn't find ext2 superblock, trying backup blocks... e2fsck: Bad magic number in super-block while trying to open /dev/sdm1 ... And I can't mount the volume any more: $ mount /dev/sdo1 /home mount: you must specify the filesystem type What am I doing wrong? Am I missing a step of the process? yeah, you deleted your file system, then created a new empty partition. instead, you should have used parted(8) or similar to expand the partition, then used resize2fs(8) to expand the file system on this partition to its new size. me, I'd strongly suggest doing a full backup of the partition first with dump(8) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
On Thu, Aug 12, 2010 at 6:21 PM, John R Pierce pie...@hogranch.com wrote: On 08/12/10 2:56 PM, Dan Yamins wrote: Hi: I have an NFS volume that I'm trying to resize a partition on. Something about the fdisk process is corrupting something on the drive Before running fdisk, I can mount the volume find: $ mount /dev/sdo1 /home ... and the volume is mounted fine. And, $ e2fsck -f /dev/sdo1 /dev/sdo1: clean, ... But then I run fdisk to rewrite the partition table of this drive, to expand the /dev/sdo1 partition w/o losing data: $ fdisk /dev/sdo # Type 'd' to delete the primary partition # Type 'n' for new partition # Type 'p' for primary # Type '1' for 1st # Type Enter for 1st cylinder # Type Enter for last cylinder (full disk) # Type 'w' to finish Calling ioctl() ... Syncing disks ... But then something has gone wrong. $ e2fsck -f /dev/sdo1 e2fsck 1.39 (29-May-2006) Couldn't find ext2 superblock, trying backup blocks... e2fsck: Bad magic number in super-block while trying to open /dev/sdm1 ... And I can't mount the volume any more: $ mount /dev/sdo1 /home mount: you must specify the filesystem type What am I doing wrong? Am I missing a step of the process? yeah, you deleted your file system, then created a new empty partition. Luckily I'm doing this via snapshots of an amazon EBS volume ... so this whole thing was done on throw-away-able backup volume, which can be recreated from the original volume at any time. I've just done this, and I've attached the newly-created volume to /dev/sdo. Now I'm trying to use parted. [r...@domu-12-31-39-0e-b2-61 ~]# parted /dev/sdo Error: Error initialising SCSI device /dev/sdo - Invalid argument I _can_ do it on the volume path itself: [r...@domu-12-31-39-0e-b2-61 ~]# parted /dev/sdo1 Using /dev/sdo1 Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) .. but this seems wrong, since I'm trying to edit the partition table not of the partition /dev/sdo1 but of the drive itself. ... Or perhaps I should this? (If so, could you give more explicit instructions?) Perhaps because this is a network attached drive, something virtual that amazon provides.However, the reason I've written to the centOS list is because the same procedure has worked fine with ubuntu images ... so it didnt' seem like an amazon problem Thanks! Dan ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
On Thu, Aug 12, 2010 at 6:25 PM, David Véjar dve...@ferreteriasantiago.clwrote: cuak ? -Mensaje original- De: centos-boun...@centos.org [mailto:centos-boun...@centos.org] En nombre de John R Pierce Enviado el: jueves, 12 de agosto de 2010 18:22 Para: CentOS mailing list Asunto: Re: [CentOS] Problem resizing partition of nfs volume On 08/12/10 2:56 PM, Dan Yamins wrote: Hi: I have an NFS volume that I'm trying to resize a partition on. Something about the fdisk process is corrupting something on the drive Before running fdisk, I can mount the volume find: $ mount /dev/sdo1 /home ... and the volume is mounted fine. And, $ e2fsck -f /dev/sdo1 /dev/sdo1: clean, ... But then I run fdisk to rewrite the partition table of this drive, to expand the /dev/sdo1 partition w/o losing data: $ fdisk /dev/sdo # Type 'd' to delete the primary partition # Type 'n' for new partition # Type 'p' for primary # Type '1' for 1st # Type Enter for 1st cylinder # Type Enter for last cylinder (full disk) # Type 'w' to finish Calling ioctl() ... Syncing disks ... But then something has gone wrong. $ e2fsck -f /dev/sdo1 e2fsck 1.39 (29-May-2006) Couldn't find ext2 superblock, trying backup blocks... e2fsck: Bad magic number in super-block while trying to open /dev/sdm1 ... And I can't mount the volume any more: $ mount /dev/sdo1 /home mount: you must specify the filesystem type What am I doing wrong? Am I missing a step of the process? yeah, you deleted your file system, then created a new empty partition. instead, you should have used parted(8) or similar to expand the partition, then used resize2fs(8) to expand the file system on this partition to its new size. me, I'd strongly suggest doing a full backup of the partition first with dump(8) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
instead, you should have used parted(8) or similar to expand the partition, then used resize2fs(8) to expand the file system on this partition to its new size. So I'm trying parted on a new, clean volume created from the snapshot, attached to /dev/sdm As I explained before, I can't do $ parted /dev/sdm [r...@domu-12-31-39-0e-b2-61 ~]# parted /dev/sdm Error: Error initialising SCSI device /dev/sdm - Invalid argument I *CAN* do parted on the path: $ parted /dev/sdm1 GNU Parted 1.8.1 Using /dev/sdm1 Welcome to GNU Parted! Type 'help' to view a list of commands. But then i get this error: (parted) resize 1 0 500GB Error: The location 500GB is outside of the device /dev/sdo1. Which is course is true ... (parted) print Disk /dev/sdm1: 21.5GB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End SizeFile system Flags 1 0.00kB 21.5GB 21.5GB ext3 So I'm not sure where to go from here... thanks! Dan ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
On Thursday 12 August 2010 17:56, Dan Yamins wrote: I have an NFS volume that I'm trying to resize a partition on. I suggest you try Parted Magic: http://partedmagic.com/ It doesn't do anything you can't do from the command line, but it's much easier to use. -- Yves Bellefeuille y...@storm.ca Au Bellefeuille estas malkompetenta juristo au li estas malhonesta; kaj ech tertium datur: ambau malvirtoj en unu homo. -- Heroldo Komunikas, n-ro 447. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem resizing partition of nfs volume
I was just shown the solution to my problem, using the sfdisk program instead of the fdisk or parted programs.Apparently parted could not work because the drive is not really SCSI, and the fdisk program is to incorrect and was overwriting a portion of the disk. however, sfdisk turns out to be more correct -- although more cumbersome to use. Dan On Thu, Aug 12, 2010 at 8:32 PM, Yves Bellefeuille y...@storm.ca wrote: On Thursday 12 August 2010 17:56, Dan Yamins wrote: I have an NFS volume that I'm trying to resize a partition on. I suggest you try Parted Magic: http://partedmagic.com/ It doesn't do anything you can't do from the command line, but it's much easier to use. -- Yves Bellefeuille y...@storm.ca Au Bellefeuille estas malkompetenta juristo au li estas malhonesta; kaj ech tertium datur: ambau malvirtoj en unu homo. -- Heroldo Komunikas, n-ro 447. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
