From coffee at ucc.asn.au Sat Sep 9 18:49:10 2017 From: coffee at ucc.asn.au (Coffee) Date: Sat, 9 Sep 2017 18:49:10 +0800 Subject: [tech] [Tech] Coke machine fault Message-ID: <090b6175-e9f2-b26e-da41-c4c4b0f248c8@ucc.asn.au> Hi all, Sometime today a fault developed in the coke machine that has lead it to trip the breaker whenever it is plugged in. I've had a quick look at it today, and could not detect any obvious faults circuitry on the front of the machine leading me to believe that the most likely culprit is either faulty wiring causing a short or the refrigeration? has finally died. We are most likely to spend Monday night fixing the machine if anyone would like to come down and help. Zack Wong coffee at ucc.asn.au -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ucc.gu.uwa.edu.au/pipermail/tech/attachments/20170909/4d56f62f/attachment.htm From bob at ucc.gu.uwa.edu.au Mon Sep 11 20:32:25 2017 From: bob at ucc.gu.uwa.edu.au (Andrew Adamson) Date: Mon, 11 Sep 2017 20:32:25 +0800 (AWST) Subject: [tech] [Tech] Coke machine fault In-Reply-To: <090b6175-e9f2-b26e-da41-c4c4b0f248c8@ucc.asn.au> References: <090b6175-e9f2-b26e-da41-c4c4b0f248c8@ucc.asn.au> Message-ID: Hi All, I had a look at this tonight along with the other Monday night hardware hackers. It looks like the condenser fan has worn out again, which explains the slight grinding noise it is making. This is not surprising given is has over 50,000 hours on it since it was last replaced in May 2012. To be clear, this might not be what is making it trip, but it's likely, and it needs replacing regardless. It's a bit of a task finding a fan for it because the machine runs at 100VAC internally, plus if I recall correctly the dimensions were a bit weird. Looking through my emails, the motor we bought back in 2012 was an ELCO NUT6B09PUN308. I know a little bit more about fans now; it would be good to replace it with something from a good brand like Papst, which would likely outlive the machine. This is a Good Thing, since you have to dismantle the whole damn machine to replace it. Side note to anyone trying to pull out the refrigeration module without pulling out the drink stacks: don't, it will bend/break the pipes. The machine is running for now - if it trips the breaker more than once in a day (or is sounding particularly bad when turned back on), I suggest it gets unplugged,labelled, and left off until we replace the fan. Andrew Adamson bob at ucc.asn.au |"If you can't beat them, join them, and then beat them." | | ---Peter's Laws | On Sat, 9 Sep 2017, Coffee wrote: > Hi all, > > Sometime today a fault developed in the coke machine that has lead it to > trip the breaker whenever it is plugged in. I've had a quick look at it > today, > and could not detect any obvious faults circuitry on the front of the > machine > leading me to believe that the most likely culprit is either faulty wiring > causing a short or the refrigeration? has finally died. We are most likely > to > spend Monday night fixing the machine if anyone would like to come down > and help. > > Zack Wong > coffee at ucc.asn.au > > From zanchey at ucc.gu.uwa.edu.au Sun Sep 17 11:21:17 2017 From: zanchey at ucc.gu.uwa.edu.au (David Adam) Date: Sun, 17 Sep 2017 11:21:17 +0800 (AWST) Subject: [tech] Cron /backups/bin/rdiff-manager/rdiff-manager.py (fwd) In-Reply-To: References: Message-ID: On Wed, 9 Aug 2017, David Adam wrote: > Backups for molmol have been failing for the last month or so as the > backup server (Mollitz) does not have enough space. > > I am planning to drop the backups of /away in order to maintain the > backups of things that actually matter, like /services. > > Mollitz has four 2 TB drives in it. Three of them are RAID-5ed to make a > 4 TB array using the hardware RAID and an ext4 filesystem, and the > fourth is a single RAID-0 which has a ZFS pool on it. (The ZFS pool uses > compression, which means it can store a bit more data.) > > At some stage, we could delete the array and redo it so that it has a > RAID-5 using all four drives, but that involves losing all the data on the > array so I have been avoiding it. I don't know why it didn't occur to me before, but I've split the backups instead - /away is now backed up to /backups/away using "away.ucc..." as the hostname, while everything else on molmol remains on /backups/molmol. /backups/molmol is still a single-drive ZFS pool. I've upgraded mollitz to Debian 9 (stretch), mainly because I needed to reboot anyway. [DAA]