I remember that when we started with KVM on LinuxONE around 3/4 years ago we connected our V7000 directly (without a SAN switch) to the LinuxONE. zVM worked like a charm, but we had a lot of problems with (the then IBM supplied) KVM….. We had a lot of discussion with both the LinuxONE and the storage guys as the documentation wasn’t quite clear on what was supported or not. Problems we faced had to do with (hope I recall correctly) with WWPN’s returned from the V7000 were all mixed up… At the moment we added a SAN switch all our problems were gone … ;-) Haven’t had any problems with KVM since ….. but haven’t checked the situation without a SAN switch in the last years.
Regards Johan Schelling Infrastructure Solution Architect [cid:[email protected]] ICU IT Services BV Transistorstraat 55b I 1322 CK ALMERE M 06 – 21 245 992 I E [email protected]<mailto:[email protected]> T 088 – 5 234 123 I www.icu-it.nl<http://www.icu-it.nl/> I KvK 32135776 ICU Proclaimer<http://www.icu-it.nl/proclaimer/> Op 17 sep. 2019, om 12:56 heeft Christian Borntraeger <[email protected]<mailto:[email protected]>> het volgende geschreven: On 16.09.19 21:19, Jim Elliott wrote: For z/VM you must have a SAN switch to connect FCP attached disk. Is this also true for KVM (Ubuntu if it matters)? As KVM borrows the FCP support from Linux the answer is the same as for Linux in LPAR. In general the Linux code supports switched fabric and direct attachment. The code does not support arbitrated loop. What you also need is a support statement that tells about the storage server and the Z system. For example a V7000 DOES work when connected to a z Box (there is no fencing) but it is not a supported config (at least it was not when I check 3 years ago). So in general you are on the safe-side with a switch. Without a switch requires to check the certifications. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected]<mailto:[email protected]> with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
