ibm ds4700 / logical drive not on preferred path

Posted: September 6th, 2011 | Author: | Filed under: ibm, infrastructure, it, virtualization | Tags: , , , | No Comments »

a ibm ds4700 with four exp 810 units lost it`s preferred path setting for one controller /some logical drives. consequences : there were some machines with non-redundant paths connected to the san – these machines lost their mounted luns.(datastore for a mail machine, datastore for a fileserver with 14TB…) first i changed on the fibre channel switch fabric the zoneing to the healthy controller and remounted the drives to get the server systems back on production. after some research i seems to be clear that the solution is just only to map the logical drives back to the preferred controller/path … *sigh you can change the controller settings for the logical drives under production scenario. learned: do *all* fc/san connections redundant – don`t save money on your fibrechannel san design … 🙂

message on the storage manager / recovery guru : Logical Drive Not On Preferred Path


Posted: June 21st, 2011 | Author: | Filed under: cisco, debian, ibm, infrastructure, it, juniper, linux, networking | Tags: , , , , , , , , | No Comments »

building a large scaled monitoring system for a customer with icinga 1.4.0 + pnp4nagios 0.6 (bulk mode with npcd), db logging. it will monitor very different stuff …. from servers to network, from esx(i) to linux machines, from firewalls to printers … good to see that all the needed software comes from the debian stable repositories (non-free). once again debian FTW !

office extension

Posted: January 18th, 2011 | Author: | Filed under: infrastructure, it | Tags: | No Comments »

dusty !

installing cooling unit

Posted: January 18th, 2011 | Author: | Filed under: infrastructure, pics | Tags: | No Comments »

in his arms ….

worried for a moment …

the funny technicians – yes ! real nice working atmosphere 😉

Posted: January 3rd, 2011 | Author: | Filed under: it, linux | Tags: , | No Comments »

infrastructure rebuild

Posted: December 12th, 2010 | Author: | Filed under: infrastructure, it, pics | Tags: , | No Comments »


rittal usv

rittal lcp plus racks, with full security features

new patchpanels, 10gbe enabled

ibm ds4700, 50tb, fc, dual pathing, raid6 enabled, >2tb partitions enabled, ibm ts3200, 2 * lto 4 fc library

netscreen/junipter ssg550m 20 * gb ports cu, 8 * sftp ports

40kw watercooling unit

*1337* xen @ debian, oldschool  rock solid ibm netfinity m700M10, 4 GB RAM, xeon p3 running 8 virt. machines


Posted: December 12th, 2010 | Author: | Filed under: it, networking, pics | Tags: , , | No Comments »