Re: [linux-lvm] Maximum address used by a virtual disk on a thin pool.
Il 13-06-2019 18:05 Ilia Zykov ha scritto: Hello. Tell me please, how can I get the maximum address used by a virtual disk (disk created with -V VirtualSize). I have several large virtual disks, but they use only a small part at the beginning of the disk. For example: # lvs LV VG Attr LSize Pool Origin Data% mylvm CVG Vwi-aot--- 100,00g fastheap7,13 Please advise me how to determine from which address the virtual disk did not allocate real disk space? And all the data read from addresses greater than this address will be exactly zeros. Or maybe, how can I get map of the used chunks of disk? Thanks. Maybe thin_dump[1] can help you? Regards. [1] https://linux.die.net/man/8/thin_dump -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.da...@assyoma.it - i...@assyoma.it GPG public key ID: FF5F32A8 ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
[linux-lvm] Maximum address used by a virtual disk on a thin pool.
Hello. Tell me please, how can I get the maximum address used by a virtual disk (disk created with -V VirtualSize). I have several large virtual disks, but they use only a small part at the beginning of the disk. For example: # lvs LV VG Attr LSize Pool Origin Data% mylvm CVG Vwi-aot--- 100,00g fastheap7,13 Please advise me how to determine from which address the virtual disk did not allocate real disk space? And all the data read from addresses greater than this address will be exactly zeros. Or maybe, how can I get map of the used chunks of disk? Thanks. ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
[linux-lvm] Question about filter behavior on pvcreate /dev/md0
Hello List, I created a md device, and used pvcreate to format it. But the pvcreate was failed with filter rules. the filter in /etc/lvm/lvm.conf: ``` filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|", "r|/dev/fd.*|", "r|/dev/cdrom|" ] ``` if I remove the filter, pvcreate will be successful. why? steps: ``` # rpm -qa | grep lvm2 lvm2-2.02.180-10.el7_6.7.x86_64 lvm2-libs-2.02.180-10.el7_6.7.x86_64 # dd if=/dev/zero of=/dev/sda bs=1M ... ... # dd if=/dev/zero of=/dev/sdb bs=1M ... ... # mdadm -C /dev/md0 -l 0 -n 2 -a yes /dev/sda /dev/sdb mdadm: Defaulting to version 1.2 metadata mdadm: array /dev/md0 started # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:00 256M 0 disk └─md09:00 508M 0 raid0 sdb 8:16 0 256M 0 disk └─md09:00 508M 0 raid0 vda253:00 40G 0 disk ├─vda1 253:101G 0 part /boot ├─vda2 253:20 38G 0 part / └─vda3 253:301G 0 part [SWAP] # pvcreate /dev/md0 Device /dev/md0 excluded by a filter. ``` Thanks zhm ___ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
