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| spike | 'lo | 12:56 |
|---|---|---|
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| shawarma | Can anyone recommend a good SATA RAID controller that works out of the box with Ubuntu? | 03:48 |
| fabbione | shawarma: 3ware are known to work but expensive | 04:19 |
| fabbione | shawarma: you get them at good price in rhus tho | 04:19 |
| shawarma | How expensive is expensive? | 04:20 |
| fabbione | shawarma: dunno.. i usually buy here shg.dk | 04:28 |
| fabbione | they are at least 10% cheap than here in Copenhagen | 04:28 |
| shawarma | ...and it works of the box? That's the most important factor, actually. | 04:29 |
| fabbione | shawarma: i don't have one myself.. most kernel developers told me that's one of the sanest | 04:29 |
| shawarma | fabbione: Just any 3ware? Or a specific one? I find it REALLY difficult figureing out if something is actually software raid or if it's real hardware raid. | 04:35 |
| shawarma | fabbione: WOW! Just noticed the price tag.. | 04:35 |
| shawarma | fabbione: That is waaaay out of my league. | 04:35 |
| fabbione | shawarma: this is -server.. not -wannabecoolwithsatahwraid | 04:36 |
| shawarma | fabbione: But a RAID controller for 195 DKK doesn't sound too much like hardware RAID. :-) | 04:36 |
| fabbione | ;) | 04:36 |
| fabbione | nope | 04:36 |
| shawarma | fabbione: :-P It IS for a production server, but not quite within that budget range. | 04:37 |
| fabbione | well.. sucks to be you :P | 04:37 |
| fabbione | no seriously.. | 04:37 |
| fabbione | i have a.. hmm let me check... | 04:37 |
| fabbione | 0000:00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80) | 04:38 |
| fabbione | i have this one on my mobo | 04:38 |
| fabbione | don't use it tho | 04:38 |
| fabbione | but the driver is loaded and doesn't crash :P | 04:38 |
| shawarma | I'm almost certain it's really software RAID. | 04:38 |
| fabbione | but why do you want hw raid? | 04:38 |
| fabbione | do you realize how many problems you have with hw raid? | 04:38 |
| shawarma | fabbione: I have one box with it that works just fine.. | 04:39 |
| shawarma | fabbione: What would those problems be? | 04:39 |
| fabbione | that's not a good reason | 04:39 |
| fabbione | first of all hw raid is not standard.. you can't unplug disks from one controller and put them into another. you are binded to that brand and porbably model forever | 04:40 |
| shawarma | It's for a production server, and my customer wants hardware raid. The want RAID for the obvious reasons and they want it to be hardware raid to minimize the performance impact. | 04:40 |
| fabbione | software raid is very light on the CPU | 04:40 |
| fabbione | that's because they don't know ^^ | 04:40 |
| shawarma | I'm curious.. If it's actually software raid.. why is a special driver needed? To fetch the RAID settings from the BIOS? | 04:41 |
| fabbione | with hw raid let say in a raid5 3 disks setup, if 2 disks die, you can wave good bye to the data (all of them) | 04:41 |
| shawarma | Of cours.e | 04:41 |
| fabbione | with software raid you can recover with a bit of luck | 04:41 |
| fabbione | ok.. there are 3 raid: | 04:41 |
| fabbione | - real hw raid | 04:42 |
| fabbione | - fake hw raid | 04:42 |
| fabbione | - real software raid (done at kernel level) | 04:42 |
| fabbione | the one you are asking about is the fake hw raid | 04:42 |
| fabbione | that seems to be hw | 04:42 |
| shawarma | right. | 04:42 |
| fabbione | but it's done via some device mapper tricks | 04:42 |
| fabbione | you need a recent kernel .12 or higher | 04:42 |
| fabbione | and dmraid | 04:42 |
| fabbione | a tool to manage it | 04:42 |
| fabbione | gotta go now | 04:43 |
| fabbione | cya around or the 15th at e2e | 04:43 |
| shawarma | Sure. when is it? | 04:43 |
| shawarma | 14:00, right? | 04:43 |
| fabbione | i think so | 04:43 |
| fabbione | i will be there before that | 04:44 |
| fabbione | remember your GPG fingerprint and documents ;) | 04:44 |
| shawarma | Alright. See you there! | 04:44 |
| shawarma | Always. | 04:44 |
| shawarma | Never leave home without them. :-) | 04:44 |
| shawarma | Hmm... So if I'm going to have to settle with fake raid anyhow (1000$ for a true hardware SATA RAID controller is WAAAY out of my budget), pretty much any SATA controller will do just fine, right? | 04:48 |
| fabbione | if the SATA is only for storage and you boot from other disks, you are okish.. otherwise no | 04:54 |
| fabbione | you can't boot from fakeraid yet afaik | 04:54 |
| shawarma | I thought you were leaving? :-) | 04:55 |
| shawarma | fabbione: I'm ALMOST sure that you can... | 04:58 |
| shawarma | I believe I have a customer who did just that. | 04:58 |
| shawarma | No, wait. That was not "fake raid" but software raid. | 04:58 |
| fabbione | exactly | 04:59 |
| fabbione | you can boot from software raid | 04:59 |
| shawarma | fabbione: So the lesson is: Use software RAID instead of fake raid? | 05:03 |
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| IzzyCC | hey all | 05:32 |
| IzzyCC | anyone here mind helping me with an install for some $? | 05:34 |
| IzzyCC | im so frustrated right now ;) | 05:34 |
| troy | IzzyCC: explain your problem :) | 07:19 |
| IzzyCC | okie, *nix newbie here... | 07:20 |
| IzzyCC | installed ubuntu... then tried to remove php4/mysql4 and put in 5 | 07:20 |
| IzzyCC | it "looked right" but yet still shows it using php4 | 07:21 |
| IzzyCC | so now im ready to just start all over again | 07:21 |
| IzzyCC | and getting super frustrated | 07:21 |
| IzzyCC | id rather just throw a few dollars via paypal to someone to get me up and going than kept having to read fubared tutorial after tutorial | 07:21 |
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| troy | IzzyCC: did you use the ubuntu packages for php and mysql? | 07:58 |
| troy | php5 is in the repositories, but mysql5 is not - 4.1 is however, and it'll work for everything I can think of | 08:01 |
| troy | so "sudo apt-get install php5 mysql-server-4.1 php5-mysql" should do it | 08:03 |
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| shawarma | fabbione: ping? | 09:52 |
| fabbione | shawarma: pong? | 09:52 |
| shawarma | fabbione: Regarding the RAID thing... Can you in short explain what the advantages of fake raid over software raid are? | 09:53 |
| shawarma | fabbione: To me, it appears there are none. | 09:54 |
| fabbione | fake raid sucks.. i never said it has advantages over software :) | 09:54 |
| fabbione | i honestly prefer software > * | 09:55 |
| shawarma | fabbione: Even true hardware RAID? | 09:55 |
| fabbione | it depends from the hw raid | 09:55 |
| fabbione | let's put it this way.. | 09:56 |
| fabbione | if you build a server with one raid controller, you lose | 09:56 |
| fabbione | (hardware) | 09:56 |
| fabbione | if you want redundancy, you need at least 2 raid controllers | 09:56 |
| fabbione | and most of them don't support sharing a disk on a chain | 09:56 |
| fabbione | so you still lose | 09:57 |
| shawarma | Heh.. Well, the chances of the mechanics or magnetic plates of a disk failing are surely higher than that of a RAID controller? But in principle, you're absolutely right. | 09:57 |
| fabbione | statics of that are sort of hairy | 09:58 |
| fabbione | i have seen both failing.. | 09:58 |
| fabbione | so | 09:58 |
| fabbione | and tbh, once you get one single raid card on a server | 09:58 |
| fabbione | that's a half quality one | 09:58 |
| fabbione | i would rather trust more a better SATA controller without raid and use software raid | 09:58 |
| fabbione | i can tell you that software raid is chea during normal operations | 09:59 |
| shawarma | But a fake raid controller doesn't give any advantages over software raid, afaics. With fake raid, you're still doing software RAID, but paying for the fancy bios configuration interface. | 09:59 |
| fabbione | the code is uber optimized | 09:59 |
| shawarma | Yeah, I know. I remember looking at it right after 2.6 came out. | 09:59 |
| fabbione | no it doesn't. because you still use the kernel device-mapper to access the right blocks on the fake raid | 09:59 |
| shawarma | nah...it wasn't right after 2.6... It was right after they revamped the dm stuff. | 10:00 |
| shawarma | Well, some time ago, anyhow. :-) | 10:00 |
| fabbione | ehehe | 10:01 |
| shawarma | Well, this cleared up quite a few things. Thanks a bunch! | 10:02 |
| fabbione | no problem dude | 10:02 |
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