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SysAdmin

• 06.21.11
  SAGE’s List of Sysadmin Gear SysAdmin | (0)

  Awhile back I listed the contents of a Data Center Go Bag that I helped put together: Data Center Support Go Bag. It was immensely helpful for us as my company branched out from a single data center to more sites. SAGE (System Administrators Guild) also has a list:  SAGE Toolbox What I have found is that all I really need is: a sharp knife a pen a screwdriver with both phillips and flat heads
• 05.31.11
  SNAPGH Update SysAdmin | (0)

  The System and Network Administrators of Pittsburgh website is up. I managed to crank this out one morning on vacation. http://snapgh.com It needs some graphics and such, but for now it accomplishes its purpose. We managed to get 3 LOPSA members so I applied for provisional local chapter status. Hopefully it was approved. Our next meeting is May 10th, 2011.
• 05.31.11
  NFS Link, SysAdmin | (0)

  I came across an awesome document: Use of NFS Considered Harmful
• 03.30.11
  SNAPGH SysAdmin | (0)

  I am working to get a System Administrator's group started here in Pittsburgh. We've just started things up and have our first meetup on Friday. I am excited to get more involved in a local group and make some tech contacts here in Pittsburgh. Right now the site has nothing snapgh.com but that will change!
• 02.03.11
  RIP RAID 6 SysAdmin | (0)

  Recently read, Why RAID 6 stops working in 2019 by Robin Harris over at zdnet.com. I currently have a fair number of Silicon Mechanic whiteboxes that each have sixteen 2TB drives. They take close to 4 days to initialize. I routinely replacing drives. What he says makes sense and begs the question what is next. SAS has much better failure rates but is only a fraction of the size. What's next for cheap enterprise storage?
• 02.02.11
  PXE to installed OS Code, SysAdmin | (0)

  Sometimes you unintentionally PXE boot while you would like to just let the local OS boot. This can happen if you have the boot order mixed up in BIOS or you hit a stray key during POST. Either way here is a helpful little entry to have in your PXE menu. label harddisk localboot 0x80 append SLX=0x80 0x80 - first partition of first HDD 0x81 - second partition of first HDD 0x00 - first floppy drive
• 01.27.11
  Calculating Heat Load Part II SysAdmin | (0)

  In case the numbers in Calculating Heat Load are hard to remember, here is a simpler way. 30 tons cools 105 kW
• 09.09.10
  Calculating Heat Load SysAdmin | (0)

  Every time I am looking for co-location space I am invariably asked what my heat load will be. I always assure them that if I am asking for 100kW then my heat load will be equivalent. Well here is the math! Tons of A/C needed = ( watts * 3.41 ) / 12,000 BTUs per ton of cooling For 100kW, the required cooling is 28.42 tons = ( 100,000 watts * 3.41 ) / 12,000 BTUs per ton This assumes that you are at 100% utilization, which is a completely different discussion. To be at 100kW at 100% you need to be fused ...
• 09.02.10
  Intel Add-In Cards Computers, SysAdmin | (0)

  We recently started using 10GbE at work. Our solution uses cat6 cable and Intel Server AT2 adapters with RJ-45 connectors. The cards themselves don't PXE out of the box, unfortunately. You need to enable them. I believe this can be done by hitting CTRL+S at some point during POST, but it is easier to boot into an limited OS and automate the changes. The issue with that is that Intel tools only work in DOS, ugh. So with that limitation I downloaded a DOS bootdisk. The last time I did that was in the 90s. Added the Intel utility and ...
• 06.17.10
  Bash, aliases, and command line arguements Code, SysAdmin | (0)

  I was recently doing some work with gzip'd files. It got kind of repetitive to keep typing gunzip file head file gzip file I know there is a zcat but I don't want to have to type zcat file | head everytime. You can create aliases in your .bashrc file. These are quick shortcut commands. The following does not work alias zhead='zcat $1 | head' #does NOT work In order for this to work you have to create a function in your .bashrc and call it from the alias. function zh(){ zcat $1 | head } alias zhead='zh'

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