Servisní odstávka diskového pole /storage/brno1 (/storage/home)
Because of several HW/SW problems that have recently occured with the disk array /storage/brno1 (/storage/home), its complex service maintenance and SW upgrade has to be urgently performed.
Unfortunately, this maintenance cannot be performed on the live system; thus, the disk array has to be ***PUT OUT OF OPERATION*** (and made inaccessible)
on Tuesday, 25. February 2014 during morning hours
(The assumed shutdown duration is 1-2 days.)
Influence on the running jobs:
- the jobs that work with the data saved on (or will save data to) another disk array will not be influenced
- the jobs that perform their computations within the scratch space, which check the success of copying-out the resulting data (e.g., using the script skeleton available at https://wiki.metacentrum.cz/wiki/Running_jobs_in_scheduler#Recommended_procedures ), and which will try to save the resulting data into /storage/brno1 (/storage/home) during the outage, will not be influenced as well (you'll find the resulting data in the scratch space of the relevant nodes)
- the jobs that work directly with the data saved in /storage/brno1 (/storage/home) or the jobs that will not check the success of copying-out the data into this array, will most probably crash. If you have some critical/long-term computations, that may be influenced by the outage, let us know -- we'll try to suspend your computation during the outage (however, the success of the suspend process cannot be guaranteed)
We're really sorry for the problems that may occur. Unfortunatelly, the current condition of the /storage/brno1 (/storage/home) disk array cannot be left untouched any more -- this would result in bigger problems in the future.
With many thanks for understanding
Tomáš Rebok.
Tom Rebok, Thu Feb 20 22:05:00 CET 2014
