Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

2018-04-12 Thread Greg Preddy
Bill, Has the dust settled now on the z/VM Spectre fixes? We put on VM65396 as well on a couple of systems then halted that until further fixes arrive. On 4/12/2018 7:26 AM, Bill Bitner wrote: Rick, if you have VM65396 on, but not VM65414, that would be my guess. VM65414 corrected a problem in

Re: Gold On LUN

2017-09-11 Thread Greg Preddy
We used EDEVICE's for 15 years, tired of that. :-) Seriously the large EDEVICEs with many zLinux OS disks per device was a bottleneck. We never moved '/var' off so log backups (often for a bunch of systems at once) and Linux backups were both having really high wait times on EDEVs, with 1 I/O at

Re: Gold On LUN

2017-09-08 Thread Greg Preddy
Thanks Robert and others, We figured there would be a learning curve, I think we'll get it figured out, we just need to figure out everything, then how you do those things on SLES12. On 9/8/2017 3:28 PM, Robert J Brenneman wrote: Ancient history: http://www.redbooks.ibm.com/redpapers/pdfs/redp3

Re: Gold On LUN

2017-09-08 Thread Greg Preddy
clones to make them work but it should at least break early during boot and not accecss the golden image (especially not writable and thus potentially destroying its golden property). On 09/07/2017 09:19 PM, Greg Preddy wrote: I think that is it, we have no clue where SLES12 puts the info abou

Re: Gold On LUN

2017-09-07 Thread Greg Preddy
y you bond scsi_id (wwid) of Lun with friendly name (mpathX for example). That multipath configuration is also saved in initrd. So if you boot from clone, it will end up mounting wrong volume. Are you using LVM? 2017-09-07 9:08 GMT-04:00 Greg Preddy : All, We're doing SLES 12 on 100%

Re: Gold On LUN

2017-09-07 Thread Greg Preddy
(/etc/multipath.conf) configuration. In there you usually you bond scsi_id (wwid) of Lun with friendly name (mpathX for example). That multipath configuration is also saved in initrd. So if you boot from clone, it will end up mounting wrong volume. Are you using LVM? 2017-09-07 9:08 GMT-04:00 Greg P

Gold On LUN

2017-09-07 Thread Greg Preddy
All, We're doing SLES 12 on 100% LUN, with gold copy on a single 60GB LUN. This is a new cloning approach for us so we're not sure how to make this work. Our Linux SA got the storage admin to replicate the LUN, but when we change the server to boot the copy, it still mounts the gold LUN. 99% sur