Re: Problems probing a LVM device with GRUB2
Hello Tom, thanks again for your assistance Tom H writes: On Fri, Sep 17, 2010 at 8:01 AM, Alberto Luaces wrote: Tom H writes: On Thu, Sep 16, 2010 at 6:02 AM, Alberto Luaces wrote: [...] Since grub-probe isn't detecting your lvm setup, it's normal for grub.cfg not to have insmod lvm. I don't think that adding that adding that line to /boot/grub/device.map could be that useful and I'm not sure that whether adding --modules=... is additive or not because you need a few more modules to be able to boot. I've forgotten the command to list the core.img modules but I'll try to find it and list the default ones that you'd have to add to your command if it isn't additive. Certainly it could be useful to know the list of modules contained in a specific core.img. Speaking of which, when I boot from /dev/sdb an get the error about not findind a partition with the uuid, I can type without any error insmod lvm insmod ext2 but then, if I type `ls', only the normal partitions are listed (hd*,msdos*), and none of the LVM volumes. Here hd0 == sdb and hd1 == sda. What is and what's on sda? Currently I have my system in /dev/sda. I am in the process of moving it to a second hard drive, /dev/sdb. Using the GRUB on /dev/sda I can boot into the LVM root partition and try to install GRUB on /dev/sdb, in order to get rid of the /dev/sda disk eventually. After the copy process of the ext partitions, I generated new UUIDs for the new ones in order to avoid clashes. More data requests... What is the output of: pvs lvs vgs fdisk -l /dev/sdb grub-probe --target=drive -d /dev/sdb grub-probe --target=drive -d /dev/sdbX grub-probe --target=drive -d /dev/dm-0 grub-probe --target=drive -d /dev/mapper/lvm_volume-debian_root (the last one with your extra line and with it commented out) Ok, here it is. I collected that data from the system in the LVM, booting manually from GRUB: pvs PV VG Fmt Attr PSize PFree /dev/sdb2 lvm_volume lvm2 a- 77,19g0 lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert debian_root lvm_volume -wi-ao 76,00g swaplvm_volume -wi-a- 1,19g vgs VG #PV #LV #SN Attr VSize VFree lvm_volume 1 2 0 wz--n- 77,19g0 fdisk -l /dev/sdb GNU Fdisk 1.2.4 [...] Disk /dev/sdb: 250 GB, 250056737280 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdb1 1 20325 1632605317 HPFS/NTFS /dev/sdb2 20325 3040280943502 8e Linux LVM grub-probe --target=drive -d /dev/sdb (/dev/sdb) grub-probe --target=drive -d /dev/sdb1 (/dev/sdb,msdos1) grub-probe --target=drive -d /dev/sdb2 (/dev/sdb,msdos1) grub-probe --target=drive -d /dev/dm-0 (lvm_volume-debian_root) grub-probe --target=drive -d /dev/mapper/lvm_volume-debian_root (lvm_volume-debian_root) If I delete the line in device.map, the only output that change is: grub-probe --target=drive -d /dev/dm-0 (/dev/dm-0) Regards, -- Alberto -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87eicbv7bh@eps142.cdf.udc.es
Re: Problems probing a LVM device with GRUB2
On Fri, Sep 17, 2010 at 8:01 AM, Alberto Luaces alua...@udc.es wrote: Tom H writes: On Thu, Sep 16, 2010 at 6:02 AM, Alberto Luaces wrote: Hi Tom, thanks for the guidance, see below: You're welcome. I'm sorry about the delay in responding. I screwed up and archived a few threads by mistake (not for the first time it seems!), of which this one. I'm trying to install GRUB2 to a disk that has an ext2/3 filesystem into a LVM partition. I can even start the system from GRUB2 and a boot disk, so it should work. The problem is that `grub-install' displays `no such disk' errors. I have tracked it down to `grub-probe': $ ls /dev/mapper/ control lvm_volume-debian_root lvm_volume-swap $ sudo grub-probe -d /dev/mapper/lvm_volume-debian_root grub-probe: error: no such disk. How can I make `grub-probe' to find the partition? I'm using Squeeze, with latest GRUB2: $ dpkg -l grub-pc [...] ii grub-pc 1.98+20100804-4 I have sid (with the same version of grub-pc) running with lvm. I am assuming that you have a setuo like mine, where /boot isn't a separate partition and /dev/sdb (I have /dev/sda but that shouldn't be an issue) is your disk with one partition on which / in an lv. What's the output of cat /boot/grub/device.map $ cat /boot/grub/device.map (fd0) /dev/fd0 (hd0) /dev/disk/by-id/ata-ST3320613AS_5SZ00HA9 Same for me and it's correct (as long as it corresponds to the /dev/disk/by-id/ entry of /dev/sdb). grub-probe --target=abstraction / $ sudo grub-probe --target=abstraction / grub-probe: error: no such disk. The problem. I get lvm. grub-probe --target=device / $ sudo grub-probe --target=device / /dev/mapper/lvm_volume-debian_root Same for me. grub-probe --target=drive / $ sudo grub-probe --target=drive / (lvm_volume-debian_root) Same for me. Thanks to that pointers of yours, I realized that I should update my device.map, adding a last line like this (lvm_volume-debian_root) /dev/mapper/lvm_volume-debian_root Now, I try to install grub again: $ sudo grub-install --no-floppy --modules=ext2 lvm /dev/sdb The command finishes succesfully, but when I try to boot from my second hard disk (sdb), I get an error that looks like: error: no such device: ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 Entering rescue mode ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 is the uuid of my /dev/dm-0. It seems now that the image of my grub doesn't have lvm support, even I activated it in the `grub-install' call. Any clue about this? Relevant snippet of my grub.cfg, note that there is no `insmod lvm' stanza! insmod ext2 set root='(lvm_volume-debian_root)' search --no-floppy --fs-uuid --set ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 Since grub-probe isn't detecting your lvm setup, it's normal for grub.cfg not to have insmod lvm. I don't think that adding that adding that line to /boot/grub/device.map could be that useful and I'm not sure that whether adding --modules=... is additive or not because you need a few more modules to be able to boot. I've forgotten the command to list the core.img modules but I'll try to find it and list the default ones that you'd have to add to your command if it isn't additive. What is and what's on sda? More data requests... What is the output of: pvs lvs vgs fdisk -l /dev/sdb grub-probe --target=drive -d /dev/sdb grub-probe --target=drive -d /dev/sdbX grub-probe --target=drive -d /dev/dm-0 grub-probe --target=drive -d /dev/mapper/lvm_volume-debian_root (the last one with your extra line and with it commented out) -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/aanlktimufagjq+zzowo1e40_izdlmjig_fkoctpno...@mail.gmail.com
Re: Problems probing a LVM device with GRUB2
Hi Tom, thanks for the guidance, see below: Tom H writes: On Thu, Sep 16, 2010 at 6:02 AM, Alberto Luaces wrote: I'm trying to install GRUB2 to a disk that has an ext2/3 filesystem into a LVM partition. I can even start the system from GRUB2 and a boot disk, so it should work. The problem is that `grub-install' displays `no such disk' errors. I have tracked it down to `grub-probe': $ ls /dev/mapper/ control lvm_volume-debian_root lvm_volume-swap $ sudo grub-probe -d /dev/mapper/lvm_volume-debian_root grub-probe: error: no such disk. How can I make `grub-probe' to find the partition? I'm using Squeeze, with latest GRUB2: $ dpkg -l grub-pc [...] ii grub-pc 1.98+20100804-4 I have sid (with the same version of grub-pc) running with lvm. Is /dev/mapper/lvm_volume-debian_root a symlink to /dev/dm-X? Yes, /dev/dm-0 What's the output of cat /boot/grub/device.map $ cat /boot/grub/device.map (fd0) /dev/fd0 (hd0) /dev/disk/by-id/ata-ST3320613AS_5SZ00HA9 grub-probe --target=abstraction / $ sudo grub-probe --target=abstraction / grub-probe: error: no such disk. grub-probe --target=device / $ sudo grub-probe --target=device / /dev/mapper/lvm_volume-debian_root grub-probe --target=drive / $ sudo grub-probe --target=drive / (lvm_volume-debian_root) Thanks to that pointers of yours, I realized that I should update my device.map, adding a last line like this (lvm_volume-debian_root) /dev/mapper/lvm_volume-debian_root Now, I try to install grub again: $ sudo grub-install --no-floppy --modules=ext2 lvm /dev/sdb The command finishes succesfully, but when I try to boot from my second hard disk (sdb), I get an error that looks like: error: no such device: ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 Entering rescue mode ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 is the uuid of my /dev/dm-0. It seems now that the image of my grub doesn't have lvm support, even I activated it in the `grub-install' call. Any clue about this? Relevant snippet of my grub.cfg, note that there is no `insmod lvm' stanza! insmod ext2 set root='(lvm_volume-debian_root)' search --no-floppy --fs-uuid --set ff5ef7a3-1d16-4a30-a3d5-1751c02c7630 -- Alberto -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87sk18d1d2@eps142.cdf.udc.es
Problems probing a LVM device with GRUB2
Hello, I'm trying to install GRUB2 to a disk that has an ext2/3 filesystem into a LVM partition. I can even start the system from GRUB2 and a boot disk, so it should work. The problem is that `grub-install' displays `no such disk' errors. I have tracked it down to `grub-probe': $ ls /dev/mapper/ control lvm_volume-debian_root lvm_volume-swap $ sudo grub-probe -d /dev/mapper/lvm_volume-debian_root grub-probe: error: no such disk. How can I make `grub-probe' to find the partition? I'm using Squeeze, with latest GRUB2: $ dpkg -l grub-pc [...] ii grub-pc1.98+20100804-4 Thanks, -- Alberto -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87zkvivwdc@eps142.cdf.udc.es
Re: Problems probing a LVM device with GRUB2
On Thu, Sep 16, 2010 at 6:02 AM, Alberto Luaces alua...@udc.es wrote: I'm trying to install GRUB2 to a disk that has an ext2/3 filesystem into a LVM partition. I can even start the system from GRUB2 and a boot disk, so it should work. The problem is that `grub-install' displays `no such disk' errors. I have tracked it down to `grub-probe': $ ls /dev/mapper/ control lvm_volume-debian_root lvm_volume-swap $ sudo grub-probe -d /dev/mapper/lvm_volume-debian_root grub-probe: error: no such disk. How can I make `grub-probe' to find the partition? I'm using Squeeze, with latest GRUB2: $ dpkg -l grub-pc [...] ii grub-pc 1.98+20100804-4 I have sid (with the same version of grub-pc) running with lvm. Is /dev/mapper/lvm_volume-debian_root a symlink to /dev/dm-X? What's the output of cat /boot/grub/device.map grub-probe --target=abstraction / grub-probe --target=device / grub-probe --target=drive / What's the grub.cfg menuentry in the 10_linux section? -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/aanlkti=5skqbbqn-9srbdsv3n0__su74aemwkl4nr...@mail.gmail.com
