CUIR, EDEVs, and SLES 9
Hi Listers, I cross-posted this on the LINUX-390 Listserv as well. We had an issue when microcode was upgraded on all our DS8000s . According to the CE, about 5 hours after the microcode was installed, the two PCHIDs connected to our SCSI DS8000 started posting error messages every 6 seconds. I logged on to one of our test systems and cd'ed to the directory mounted on the scsi disk. When I issued the ls command, my linux went to sleep and never came back. Our fcp is defined using EDEVs...so using MAINT, I then issued the Q EDEV command and it just locked up MAINT. The following messages appeared on OPERATOR (every minute): HCPMHT2150I DASD 0E01 and interrupt is pending HCPMHT6304I IRB= (all zeroes) HCPMHT6305I Userid=LNXCUPT We eventually forced the linux guest down and shutdown z/VM and then toggled the PCHID off/on which cleared up the error. I was able to IPL both z/VM and the linux guest and had no problems getting to the data. Our CE wonders if it was CUIR ... the documentation states it supports z/VM. I opened an issue with IBM to confirm z/VM supports CUIR on SCSI and I've pasted their response below: We do not support CUIR on SCSI. CUIR only affects CKD volumes. The HW will not give us any quiesce/resume requests for SCSI volumes regardless of whether we have a single or multiple path(s) to the LUN. Even without CUIR surely EDEVs should handle failures. Responses on the LINUX-390 indicated native SCSI handles path failures just fine. Has anyone experienced an outage to their data on SCSI when defined on EDEVs due to path failures? Thanks in advance for any advice. susan
Guest access to z9 DVD drive
Robert Nix wrote: snip/ Access to the DVD drive on the HMC is incredibly slow. I think it was meant as a means of bootstraping up a bare system when you first get it, rather than being intended for long-term use as a mainframe device. It's faster and easier to create the ISO on your laptop and FTP/NFS/SCP it up to one of you Linux guests. Remember that, while the HMC is part of the mainframe, it isn't directly attached; it's networked to the mainframe on a private network, and probably a slower one than you have attached to your OSA cards. /snip Thanks Robert... I knew the drive was part of the HMC, but didn't realize it was network attached didn't think aout it really. I appreciate your explanation. Thanks again to all who replied to my question. susan
Guest access to z9 DVD drive
Mark Post wrote: snip/ If you could explain what you would have been doing with this ability, = perhaps we could show you a different way to accomplish it. /snip Hi Mark, Today we mount the Linux installation CDs on a Fedora NFS and build the ISO images that are then FTPed across the intranet to a zLinux guest. The install tree is then built on the linux guest. Creating Linux images from the install tree on a linux guest (on a vswitch) is so much faster than when the install tree is built on an NFS in the network. I just thought that if we could provide the guest access to the DVD drive we could build the ISO images directly to a file system on zLinux. (Not sure if I'm adequately describing this.) Admittedly, we don't need to do this often, but when we do, it seems that it would be a big time-saver. I'm presuming the DVD in the HMC would be able to read the SUSE SLES Installation CDs. Thanks... susan
Guest access to z9 DVD drive
Susan Zimmerman wrote: snip/ -- Date:Fri, 16 Nov 2007 08:47:27 -0500 From:Susan Zimmerman [EMAIL PROTECTED] Subject: Guest access to z9 DVD drive Hi all, new with 5.3 is guest access to the HMC ASCII console. Does anyone know if z/VM provides guest access to the DVD drive? Thanks in advance. susan -- /snip I was afraid the answer would be No, but hoped someone had stumbled across a way to access it. Thanks to all who replied. susan
GDPS/XRC
Hi Listers. We are in the planning stages of implementing GDPS/XRC. We have z/OS, z/VM, and Linux on zSeries (running as guests on z/VM). z/VM is at 5.3 installed on CKD. Linux is SLES9 SP3 installed on CKD and SCSI. CKD for / (root) and SCSI for user data. The SCSI is via EDEV. From what I've read it appears that Linux for zSeries is supported by XRC (on CKD - which means I'll need to convert off SCSI), but I can't quite determine if z/VM is supported. I've searched the LISTSERV archives and found where folks have been discussing this very issue...but I'm still unsure about z/VM. Any information (pitfalls, success stories), on this is greatly appreciated!I plan to cross-post this on the LINUX-390 Listserv as well. TIA, susan
Susan Zimmerman/40/HQ/NFCU is out of the office.
I will be out of the office starting 07/14/2006 and will not return until 07/24/2006. I will respond to your message when I return.
