DFDSS (OK, I know, it is DFSMSdss), should work if you don't mind putting the CDL volume online to OS390 to dump it to tape. I'd be a little worried about the state of a Linux file system dumped from OS/390 unless it was cleanly unmounted or mounted R/O to Linux at the time. Make that a lot worried. A lot can happen in the time it takes to dump a volume to tape.
You can use the DUMPCONDITIONING option on DSS Copy (http://www-1.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/Flash10092) to allow you to copy the volume to another using SnapShot(RVA/SVA) or FlashCopy (if your control unit has these features), and dump it from there, while maintaining the illusion that the volume was being dumped directly from the original volume. This helps on a restore at the DR site, since you don't have to reclip the volume after the restore to get the VOLSER to match the original. Or, use FDR to dump or copy the volume while it is offline, or use a SnapShot job to copy the volume while it is offline to OS/390. The advantage of using a fast replication(Snap, Flash, etc.) utility is that the window of opportunity for a file system inconsistency is smaller. However, inconsistency it is still a big issue, since Linux caches writes in processor memory. You can use the sync command from the Linux system to flush the buffers down to the disk, but it is an asynchronous operation so you don't know when it is complete, and nothing says there won't be another write cached in processor memory immediately after the sync. Unmounting is the safest route. Assuming you are talking about your relatively static Linux OS volume(s), you might be OK. At any rate, with the correct parameters to invoke a PHYSICAL copy or dump, DFDSS, FDR, or SnapShot (for volume copy) will all carry the IPL records for a CDL volume. Scott Ledbetter StorageTek > -----Original Message----- > From: James Melin [mailto:[EMAIL PROTECTED] > Sent: September 04, 2003 2:12 PM > To: [EMAIL PROTECTED] > Subject: Re: CDL backup and copying the IPL record > > > Oy. > > Well then, how would you recommend this be done? I have no > decent facility > at disaster recovery to IPL a recovery CD and mount the disk images to > that. The vendor is reluctant to load anything from CD at the > HMC. I'm > basically trying to take the file system images on the CDL > volumes and back > them up using OS/390 tools and then restore them with the > same tools, to > diff volumes, map those volumes to the same device addresses > as they were > on the original system in VM and IPL. > > > > > |---------+----------------------------> > | | "Post, Mark K" | > | | <[EMAIL PROTECTED]| > | | m> | > | | Sent by: Linux on| > | | 390 Port | > | | <[EMAIL PROTECTED]| > | | IST.EDU> | > | | | > | | | > | | 09/04/2003 02:37 | > | | PM | > | | Please respond to| > | | Linux on 390 Port| > | | | > |---------+----------------------------> > > >------------------------------------------------------------- > -----------------------------------------------------------------| > | > | > | To: [EMAIL PROTECTED] > | > | cc: > | > | Subject: Re: CDL backup and copying the IPL record > | > > >------------------------------------------------------------- > -----------------------------------------------------------------| > > > > > Jim, > > I don't think those two statements are either necessarily correct, or > incorrect. I would say that the "trick" is that the first > cylinder to be > dumped to tape (and restored to disk at real cylinder 0) > needs to be what > the Linux/390 system thinks is cylinder 0. That's where the > IPL record > information is going to be. So, depending on how the > minidisk is set up > (if > using z/VM), and how you dump it, etc., etc., etc. > > > Mark Post > > -----Original Message----- > From: James Melin [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 04, 2003 1:28 PM > To: [EMAIL PROTECTED] > Subject: CDL backup and copying the IPL record > > > If I understand things correctly, a DD dump of a linux volume > will not copy > the IPL record, whereas a disk copy of the CDL image on the > OS/390 side, > will? Is that a true statement? > Would this allow you to restore say a slightly pregnant mod-9 > device (our > dasd person gave me an approximately correct size mod-9 and > our disaster > recovery vendor uses real mod-9 geometry 1014 tracks too > small) to a mod > 27, and be able to read an IPL record off that device? >
