I'm in the same situation, but I can answer some questions. 1) You cannot backup a LINUX disk to tape from outside of the LINUX system, if the disk (filesystem) is mounted in WRITE mode. This would result in a "fuzzy" backup since LINUX does not immediately write all disk updates to the filesystem. The backup would likely be no good.
2) You cannot really share a single disk (filesystem) between multiple Linux systems unless all systems mount the disk in READ-ONLY mode. This is for the same reason as #1. 3) You can backup your Linux disk with DDR or your OS/390 (z/OS) backup program. But only if the disk (filesystem) is either not in use by any Linux system or, again, is READ-ONLY to all Linux systems. 4) This is very similar to the standard CMS restriction about linking to CMS minidisks. With the added caveat that if even one system had the disk (filesystem) mounted as Read/Write, then other systems cannot link to it even in READ-ONLY mode. It just will not consistantly work properly. > -----Original Message----- > From: Duane Weaver [SMTP:[EMAIL PROTECTED] > Sent: Tuesday, February 25, 2003 12:40 PM > To: [EMAIL PROTECTED] > Subject: PLanning for Z/VM and Linux > > We are in the planning stages of installing Z/VM with the intent of > installing Linux. > > > How do other sites handle the backups done of the Linux virtual > machines? Are the backups done from the VM side using DDR? > Or are the backups done within the Linux virtual machine, some how giving > tape access to the virtual machine? > > It has been long enough since I worked with VM, that I never became > familiar with the Share File System. The thing that I remember about > VM is that your files were secure until you allow someone else to link to > your minidisk. IS that still the case? Do I need a security system on > installed on VM? > > > Duane
