Mike, I don't have this problem with my SLES 11 SP3 systems on System z as cio-ignore was not enabled, by default, at installation time. I encountered this problem with SLES 12 on System z as cio-ignore is enabled by default. I was just playing with SLES 12 to make note of the changes from SLES 11 .
When I install SLES 12 in non-play mode, I will disable this option as we only allow a guest to see the dasd volumes that it needs. Harley Linker Acxiom Corporation P.S. I may see you at the upcoming CAVMEN meeting. -----Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mike Walter Sent: Monday, January 12, 2015 11:09 AM To: LINUX-390@VM.MARIST.EDU Subject: cio_ignore vs Linux in System z The cio_ignore table within Linux (at least in RHEL6.5) is used to restrict access devices, both real and virtual. Being new the Linux on System z, this has become an occasional stumbling block for our Linux admins; when we z/VM sysprogs attach a new virtual or real device and the guest cannot see it immediately. I'm told that on distributed x86 (at least x86 here), the servers can see all the hardware. Is there a good reason that on Linux on System z the default is to prevent access to all devices unless they are manually removed from the cio_ignore table? I understand that an authorized user could attach a wrong device to a zLinux guest, so let's accept that risk as having been minimized. Are there other reasons to prevent every guest from accessing whatever devices are given to it? Thanks! Mike Walter Aon Corporation The opinions expressed herein are mine alone, not necessarily those of my employer. FWIW, I subscribe in digest mode - so my responses may be slightly delayed. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ *************************************************************************** The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. **************************************************************************** ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
