KCLUG

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"Embrace The Penguin" Linux Action, Fri. June 15
by Jim Herrmann 11 Jun '07

11 Jun '07

The world premiere of the KCLUG written song "Embrace The Penguin" will occur this Friday night at 7:00 p.m. at the Songwriters Circle Night at Toto's Coffeehouse in Mission. Toto's is on Johnson Drive just east of Metcalf. You are all invited to attend. We will be video taping the new songs for Songpull.com. We could get a copy of the video to post other places like You Tube and KCLUG.ORG. There is an interview process that goes with each song, and I thought we would include a KCLUG presence as part of the interview. Interviews start at 6:30 so if you want to be in the video, be there early. Monty and I were thinking we could have a KCLUG action at this event to hand out either copies of Linux or at the least hand outs with more information like where to get free Ubuntu CDs and where to get local support (KCLUG). Monty is thinking he'll have "the cards" to hand out. What does the KCLUG community think about this idea? Seems like a good promotion event. Discuss. Peace, Jim

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A Challenge for You
by Julie 08 Jun '07

08 Jun '07

Hi, I ran into this in one of the newsletters I get from TechRepublic and thought I'd pass it along to those who don't already know about it. The name of the article is: "A challenge to the Linux Users of the World" The URL is: http://techrepublic.com.com/5208-6230-0.html?forumID=102&threadID=224037&st… Have fun! Julie @};- --------------------------------- Need a vacation? Get great deals to amazing places on Yahoo! Travel.

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Smallest footprint "daily use" Linux installs.
by Oren Beck 07 Jun '07

07 Jun '07

In the SATA thread comment was made about older drives being "too small" While at first thought we had some of this already worked out- a new angle comes up. The concept of older smaller drives being used as "in place failure mitigation" Overview is: A fully functional install with minimal yet complete tools for recovery. However the functionality has to include daily use items such as web browser,light office etc. The real shining grace comes when drive appearing to windows as letter R or similar saves the day. That day saving is executed by having copies of the most recent user data- and tools to use it. Or at minimum burn/network/email a copy of that user data. So how is this concept different? THIS concept boots up to a stable Linux desktop and turns panic into hope. Boot sequence is set so a primary drive boot failure invokes the "recovery drive" to take over. Allowing recovery in a graceful no panic fashion. Even possibly showing a Windows user how Linux can save the day.

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e-Bay listing : Motherboard, Processor and Ram combo deal
by Joe Brouhard 07 Jun '07

07 Jun '07

I've posted another one of my "spare hardware" deals. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330131273210 If anyone wants to settle this off list, they need to contact me. -- Joe Brouhard jbrouhard(a)gmail.com

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RE: SATA PT2
by Phil Thayer 07 Jun '07

07 Jun '07

This is an interesting idea. You would still have the vulnerability of a stripeset with "A" and "B" where a failure of a single disk would cause the loss of data from two stripesets. Not sure I would want that. If your concerned about utilizing all the drive space on disk drives with different sizes you may be SOL on that unless you use a SAN disk virtualization methodology. As for figuring out the second parity calculation on RAID 6, what the manufacturers are realizing is that they don't necessarily have to have a different parity algorithm to calculate the second parity. Simply putting the same XOR parity data on two separate disks will provide the same RAID 6 functionality as having a second parity calculation with lower overhead on controllers. The old KISS methodology is coming back into play. I think you will see more and more of the manufacturers going this route. Phil ________________________________ Alternatively, make it two separate 4-drive RAID 5 arrays. To be brutally honest, I tried to read the technical description of how the second parity is calculated, but I can't make sense of it. In our 8-drive scenario, we have a stripe of 6 data blocks, a parity block which is the xor of the 6 data, and some funkified thing I can't wrap my brain around, that somehow allows us to reconstruct any two failed data blocks, so long as we have the other four plus the two parity blocks. And I just don't get how that can work. For the sake of argument, I'll assume it can somehow; it's got to be a hell of a lot more complicated than XOR. I might even recommend the 8 drives be set up as a 7-drive RAID 5 with the 8th drive in the bullpen waiting to be thrown in as a hot spare. When a drive fails, the relief drive would be brought up to speed with the others automagically, and you'd get a text message on your cell phone telling you that a drive had failed in the array. [Tangent alert] Looking at the Drobo (http://www.drobo.com/) has me thinking about how I'd design a software RAID solution to automatically use the space the best way, regardless of how many and how large the drives are. Let's say we have a cage that can handle up to 8 hot-pluggable drives. A single drive is trivial; it's just a disk. With two or more drives, the system would allocate all the space on the smaller drives to mirror the same amount of space on the larger one in a RAID-1 configuration: D1 AAAAAAA D2 AAAAAAABB D3 AAAAAAABB ... DN AAAAAAABBZZZZZ The areas marked A would be mirrored across all drives. Reads could be done in parallel, fetching different sectors from each drive to get the benefit of striping. The areas marked B would be mirrored across the drives on which they exist, and Z would not be mirrorred at all, so it would not be available except for applications that have specifically asked for the unmirrored filesystem (the box would export several filesystems to the network, each with different redundancy priority; you could use non-redundant space for work files that could be reconstructed if a drive failed.). Now, once all of the A and B areas are nearly full, the system starts converting them, a bit at a time, into RAID 5: D1 aAAAAAA D2 aAAAAAABB D3 aAAAAAABB ... DN aAAAAAABBZZZZZ D1 aaAAAAA D2 aaAAAAABB D3 aaAAAAABB ... DN aaAAAAABBZZZZZ . . . D1 aaaaaaa D2 aaaaaaabb D3 aaaaaaabb ... DN aaaaaaabbZZZZZ At this point, we've got all the drives doing as much RAID-5 as they can, then another chunk of RAID-5 that's missing the smallest drive, etc., until we get to the largest drive that still has that damned unmirrored section. This is as big as it can get without losing redundancy. We might allow the unmirrored area to grow downward and take up some of the space toward the right, since that's the area where parity is the highest percentage of data. But somewhere along the line, we throw another drive into the cage, and the system would automatically mirror the RAID-1 zone, and the RAID-5 gets reconfigured to use the new drive, expanding the space available in the process. To do this right would probably include rewriting LVM code, but it ought to be possible in userspace as a proof of concept.

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Looking for donations of computer parts this week
by Chuck 06 Jun '07

06 Jun '07

The Creative Minds Arts Center is a community arts center located at 3109 Troost in east Kansas City, Missouri. We run the Hip Hop Academy, an arts program for pre-teens and young teens. We host movies, concerts, plays, speakers, and art shows in our theater. The Crossroads Infoshop and Radical Bookstore is under our roof. We have a room full of donated computers (around 20-25) that we are trying to turn into a community computer lab. A geek from the Bay Area is in town this week and is volunteering his time to get these computers working and networked. These computers were donated to the CMAC two years ago. They are mostly Compaqs using the first generation of Pentium chips. We are planning to install Ubuntu on at least half of these computers. We are looking for CD-ROM drives, because most of these computers don't have them and it makes it easier to install software. We are also looking for memory. Volunteers are also appreciated and we won't frown if you donate other, more recent, computer equipment. Donations to this project are tax deductible. You are welcome to drop off parts and equipment during the following hours: Monday: 4-7 pm Wednesday: 1-5 pm Saturday: 1-5 pm We can arrange pickup of donated equipment, depending on what you are donating and your location. Chuck Crossroads Infoshop http://www.crossroadskc.org Creative Minds Arts Center 3109 Troost, KCMO

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SATA PT2
by Earle Beason 05 Jun '07

05 Jun '07

Thanks to everybody who clued me in on what I needed for duel sata, I seen a demonstration computer running a quad core processor with SUSE 10.3 and thought to myself it time to update the server, I already have four IDE drives totaling 750G, on a win98/XP system. that somewhat works and a 40G Sata have been playing around with while learning Linux. The tech wold seems to be leaning heavily toward SATA for future developments, So i figured i might as well go that route for now. If I could afford 1T SCSI HD, I would go that route. but as it my planning is going know, I dumping everything into the processor. I am going to build a new server with the quad core that is just out or is coming out, So far I think I going with the Kentfield processor from Intel, unless the Barcelona (sp?) from AMD seems to better suit me when I get it time to go shopping. The Mobo I saw an Asues that I still checking into.

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OT: Computer Parts Up for Bids :)
by rcedelman＠comcast.net 04 Jun '07

04 Jun '07

In an attempt to scrounge up the funds to buy a new supervisor module for my cisco switch, I'm offering up the following parts for sale... 1 AMD Athlon64 3200+ cpu (cpu only, no heatsink/fan... used) - $20 2 1U Server cases - Supermicro SC512C - $50/each If these aren't gone by the end of this week, I'm throwing them up on ebay. Rich

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Re: Looking for donations of computer parts this week
by rcedelman＠comcast.net 04 Jun '07

04 Jun '07

I don't have a spare CPU, but I do have 2 1U heatsink/fans for socket 478 cpus. -------------- Original message ---------------------- From: Luke -Jr <luke(a)dashjr.org> > Speaking of donations, anyone have a spare socket 478 CPU and/or 1U > heatsink/fan for such? > > Thanks, > > Luke > _______________________________________________ > Kclug mailing list > Kclug(a)kclug.org > http://kclug.org/mailman/listinfo/kclug

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re: dual SATA drives
by gary hildebrand 04 Jun '07

04 Jun '07

I use SCSI, and have no problems. Leave the SATA for the Windoesn't crowd. Gary Hildebrand St. Joseph, MO

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