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Comment: Re:Premature (Score 1) 499

by KingMotley (#49794147) Attached to: How Tesla Batteries Will Force Home Wiring To Go Low Voltage

There are no current 95% efficient PC power supplies. 80 Plus Platinum only requires 89% efficiency at full load. In ONE case, dell/delta make a 80 Plus Titanium power supply that can hit 96% efficiency... but it's a dual-redundant power supply, and only if it's under 50% load, but 90% at 10% load, and 91% at 100% load.. Both of which are more likely scenarios -- My servers are either fairly idle, or running hard.

Comment: Re:It's RAID 0 (Score 1) 226

by KingMotley (#49745877) Attached to: Linux 4.0 Has a File-System Corruption Problem, RAID Users Warned

Raid 10 can survive SOME 2-drive failures (in a 4-drive raid 10), and has significantly faster write speeds than Raid 5.

Personally, I use a combination of RAID-0 and RAID-6 (not the same array), because Raid-5 for large arrays is almost useless. I've seen too many raid-5's die when the bad drive is replaced and the added stress of the rebuild then kills a second drive. Ouch.

Comment: Re:I call BS (Score 1) 184

by KingMotley (#49665033) Attached to: Enterprise SSDs, Powered Off, Potentially Lose Data In a Week

Ah, I thought RAID1 would warn you somehow of bit flips which I assume would be the way heat-deteriorated storage would show up.

It does. The description of how RAID1 works was incorrect. No raid controller that I am aware of implements RAID1 that way. That would include DELL's persec raid controllers, INTEL's ICH raid controllers, Adaptec raid controllers, LSI's raid controllers, rocket raid controllers, and window's implementation.

Comment: Re:I call BS (Score 1) 184

by KingMotley (#49664899) Attached to: Enterprise SSDs, Powered Off, Potentially Lose Data In a Week

For a RAID1, most RAID controllers (and software RAID implementations) will absolutely read from all devices so as to service the read ASAP.

No, almost every RAID1 controller I've ever encountered does not do that at all. It balances the reads across the drives so that the it maximizes throughput and IOPS. Only when one drive attempts to read a sector and it detects an error through it's internal CRC checks and is unable to rectify the error (short period for raid drives, long period for desktop class drives), THEN it will request the data from the alternate drive and have the original drive correct itself.

Comment: Re:And it's gonna rain (Score 1) 83

by KingMotley (#49567011) Attached to: Amazon's Profits Are Floating On a Cloud (Computing)

Just out of curiosity, I fired up a D14 VM and loaded SQLIO on it. It came back with 253713 IOPs. If you got less than one, you were doing something very very very wrong. BTW, there is no reason to load SQL server of any type on the machine as SQLIO doesn't use it, so uh...yeah.

Did you set up a VPN to your local machine and then test how many IOPs you get to your local machine over a network share? LOL.

Heard that the next Space Shuttle is supposed to carry several Guernsey cows? It's gonna be the herd shot 'round the world.