Hallo we would like to back up LVM managed volumes without using snapshot features. Background is that we have quite a couple of disk which we do not want to double to have a snapshot device. We run Linux for zSeries next to some z/OS systems on IBM 2064 machines in LPAR mode. Linux data is stored on 3390-9 DASD in CDL Format (i.e. ECKD). We use LVM to build logical volumes from DASD devices. In that logical volumes ReiserFS is established as filesystem. The DASD volumes for Linux are also accessable from other LPARs, so we are (at least in a technical way) able to back up Linux data onto tape catridges using z/OS ADRDSSU. Main problem is that ADRDSSU does not take care about delayed writes to physical volumes. So filesystem are to be mounted read only to back it up properly. A way z/OS Unix filesystem zFS deals with this issue is called quiescing r/w mounted filesystems. Before an ADRDSSU full volume dump is processed, all activity on the zFS VSAM linar data sets (which might be compared to as a physical volume) is going to be drained and new requests will be suspended. Next step after ADRDSSU dump is to unquiesce the zFS filesystem, i.e. I/O operation to VSAM will continue. Main benefit is that all filesystem operations from applications can continue since quiescing is invisible for users - apart from some delay of response time. Is there a way to use such a proceeding with Linux LVM managed DASD? Kind regards Michael Kläschen ----------------------------------------------------------------------- Provinzial Versicherungen Michael Kläschen Sophienblatt 33 24114 Kiel Telefon (0431) 603-1968 Telefax (0431) 603-101968 http://www.provinzial.de ----------------------------------------------------------------------- Diese E-Mail ist allein für den / die bezeichneten Adressaten bestimmt. Sie kann rechtlich vertrauliche Informationen enthalten. Wenn Sie diese E-Mail irrtümlich erhalten haben, informieren Sie bitte unverzüglich den Absender und löschen Sie diese Nachricht von Ihrem Computer. Vielen Dank. This email is for the exclusive use of the addressee. It may contain legally privileged information. If you have received this message in error, please notify the sender immediately and delete the message from your computer. Thank you. _______________________________________________ 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/
