@ewwhite BTW, I suspect your Supermicros with weak batteries are broken - possibly the battery packs are overheating. I have seen a couple of Dell and Fujitsu systems with LSI controllers, none of them needed yearly battpack replacement (except you screwed the pack up by deep-discharge). Also, the HP controllers are LSI gear too, they just have slightly differing firmware.
@syneticon-dj You're probably right about the environmental conditions. The Supermicros have poor cooling in our implementation. I checked with one of my old jobs with a lot of Dell hardware, and they're getting 3-5 years on batteries. HP Smart Array RAID controllers are HP design/firmware, using PMC Sierra chips, though. Only rebranded LSI for HBAs.
I'm wondering why you need this RAID setup. The chances of triple drive failure are in the realms of winning the lottery twice in one day then being struck by lightning twice. Have a couple cold-spares handy and decent monitoring. — Nathan C44 secs ago
@Chopper3 Yeah, it chunked out the print job into 5 jobs so you could just stack the output in order. First print test sucked. They were all on the same circuit.
@ewwhite, nothing personal. The "information" about RAID 10 vs RAID 6 was irrelevant. The points about stress on the system you made were also irrelevant, given that the type of stress is different (reads for svMotion vs reads+writes+parity calcs for reconstruction of RAID 6). The point about the hot-spare ignored the fact that I said reconstruction makes the system performance suffer dramatically. Do you honestly believe your answer deserves to be accepted? You ignored the environmental constraints of the OP and dove straight into fantasy. Real environments aren't a perfect world. — Lucretius3 mins ago
At our high school someone brought in computer that was submerged in transformer oil ...for its cooling. Everything except the hard drive was submerged in a plastic (?) casing
of course, the hard drive was mounted externally to the case and was prone to overheating on its own lol
@NathanC I'm about to build my first every gaming rig (somehow I've never done this in all the years!) - so have started looking around at people's overclocking setups and some have MENTAL water and LN2 systems, mental
@voretaq7 Well the PC can generate up to 200W, and is only 64mm wide, so it needed somewhere to go with all that heat, and installing a jet engine to cool the thing wasn't going to happen.
@voretaq7 it's properly heavy-duty actually, which is fair enough if you want that, I want the power and flexibility of that machine but in a tiny box - hence why I'm going mATX instead
Ahhh government regulations. Thousands of pages of vague requirements with no real world examples, based on technologies from the 90s, with various "soon to be updated" sprinkled throughout for the past 15 years. Grrr....
"Ladies and Gentlemen - If you can't remember your fucking passwords, stop and call the help desk. If it was wrong the first time what the hell makes you think it's going to be right the next 50 times you try it?!"
even better. Actually when I was at a company with 12k users we had it set to auto-unlock after 30 minutes. Usually the employee remembered their password by the time helpdesk got around to them. Passwords just need to go away TBH...biometrics and other means should just be required by 2015. People shouldn't have to remember complex passwords, change them every 90 days, etc.
Although I did like an employee here ask me "if I use my fingerprint for login when it requires a password change will I need to just use a different finger"...
:) "You get 10 different finger passwords...after that we switch to toes...after that you are fired and replaced with someone else. It's all in the IT Security policy. Sorry."
@JoelESalas That's doing an offline resize… you can do it online. Especially if you're willing to do math and manipulate the dm table directly. Don't fuck up.
@ewwhite Um, I dunno... It's mostly there to register a system or to check its expiration date. If you bought RHEL bundled with your HP system, then it can find the subscription details automatically without you having to enter them. It's just a simple tool... access.redhat.com/site/documentation/en-US/…
@ewwhite, Storage vMotion doesn't place the same type of stress on the array as a raid reconstruction. It's much less of an impact. Storage vMotion will simply read from the affected array and write to the unaffected array, while a reconstruction of a RAID6 volume involves a lot of distributed writes and parity calculations. I would have accepted your answer, but you added on a lot of unecessary lecturing and bad information. — Lucretius3 hours ago
@ewwhite, nothing personal. The "information" about RAID 10 vs RAID 6 was irrelevant. The points about stress on the system you made were also irrelevant, given that the type of stress is different (reads for svMotion vs reads+writes+parity calcs for reconstruction of RAID 6). The point about the hot-spare ignored the fact that I said reconstruction makes the system performance suffer dramatically. Do you honestly believe your answer deserves to be accepted? You ignored the environmental constraints of the OP and dove straight into fantasy. Real environments aren't a perfect world. — Lucretius1 hour ago
There is a candidate in the Server Fault election (which is ending shortly) that has been suspended from the main site for behavioral reasons more than once. He's also been kicked from chat, and banned on at least three other SE sites. He even had his original nomination deleted by Shog9, because...
