Cygnet Tech Blog

How to update DCS 6105 BIOS to Dell Power Edge c6105 BIOS in order to support AMD Opteron 4300 series CPU. Download Dell PowerEdge c6105 BIOS version 2.2.0 which is the first version that support Opteron 4200 and 4300 series. Download  PEC6105BIOS020200.exe  floppy image and extract to your bootable DOS USB disk. You just need to use 6105v220.ROM image to flush  BIOS. You need to download AMI bios utility AFUDOS.exe version 4.4 and put into bootable USB disk. You can use rufus to make bootable usb. just select FreeDOS before you click Start. After booting to the USB, run the following command afudos  6105v220 .rom /P /B /N /C /E /K /X  Below image is before upgrade , version is S2G_3A21. Build Date: 06/03/11. After upgrade, the version become 2.2.0. You can see the process or Opteron 4164 EE. You have to use Opteron 4100 series CPU to upgrade the BIOS. After booting to windows, i was able to directly upgrade to 2.5.0 by running the fi...

I have issue with launching IPMI after java JRE version update 1.8.131. "Error: unsigned application requesting unrestricted access to system the following resource is signed with a weak signature algorithm MD5withRSA and is treated as unsigned" The resolution is you can comment out java.security under C:\Program Files\Java\jre1.8.0_131\lib\security #jdk.jar.disabledAlgorithms=MD2, MD5, RSA keySize < 1024 you will able to launch JNLP file without issue.

If you want to extend multiple VM's HDD drive in one go, below script is useful. I've extended 10 Windows VM's HDD in 4 minutes.  Create below script in notepad and save as "extendhdd.ps1". At the same time create another text file and put all servers line by line. eg. in host.txt server1 server2 server3 So if you want to run the script, open your PowerCLI from one of the servers and put two files " ___extendhdd.ps1____ $GuestUser="domain\account" $GuestPassword="xxxx" $hosts = get-content hosts.txt foreach ($server in $hosts) { Get-HardDisk -vm $server | where {$_.Name -eq "Hard Disk 2"} | Set-HardDisk -CapacityKB 15728640 -Confirm:$false Invoke-VMScript -VM $server -ScriptText "ECHO RESCAN > F:\DiskPart.txt && ECHO SELECT Volume F >> F:\DiskPart.txt && ECHO EXTEND >> F:\DiskPart.txt && ECHO EXIT >> F:\DiskPart.txt && DiskP...

After the setup has completed, I need to choose which storage software to be used such as FreeNAS, Openfiler , MS iSCSI Software Initiator, StarWind Virtual SAN software etc. I prefer to use FreeNAS but the HP dc7900 do not have ECC RAM. I decided to test StarWind Virtual San with Windows Server 2012. So I installed Windows Server 2012 on the 2.5" 160GB HDD and installed StarWind VirtualSan on that. After that download HP Smart Array software to configure the RAID. I've configure 4 x 146GB SAS HDD to RAID 0 and the space become 584GB of logical drive. I've downloaded CrystalDiskMark software and tested the speed for the SAS HDD RAID 0 with HP Smart Array P410 with 512MB cache. The result is .

I was thinking to build cheap SAN storage for home lab VMware ESXi share storage. My target to build is compact and budget is less than 200 SGD. When I was digging information from Google and nothing satisfied me. So I have decided to use my old HP dc7900 SFF desktop as SAN storage. That PC was bought around $80 SGD during auction from my company last 2 years ago.  As you know SFF can only put maximum 2 x 3.5" HDD internally. I have idea to utilize CDRom drive space and replace with those 2.5" 4 bay hot swap HDD Cage.  I found Monoprice 10058 5.25" to 4x2.5" SAS/SATA 6Gb/s hot-swap Aluminum HDD Cage w/key from eBay and purchased with 35 USD. This HDD Cage support up to 12mm 2.5" HDD so it can install SAS HDD as well. Initially I have intended to purchased 6 bay or 8 pay but they only support 9mm and 7mm thin HDD. RAID card My purose is to use as SAN storage. So I was also looking for cheap RAID card. After searching a few information, most of LSI R...

I'm not sure everyone facing this issue or not. When I update or install something on my Ubuntu 14.04 server, it always uses "sg.archive.ubuntu.com" Singapore mirror and it's working during weekdays and failed on weekend Sat and Sun. So I make changes on the apt repository. $sudo vim /etc/apt/source.list comment out  # deb http://sg.archive.ubuntu.com/xxxx and add  deb http://au.archive.ubuntu.com/xxx then run the command apt-get update then solve the issue.

The VIA ART-3000 is a complete, fanless and ruggedized embedded box PC, designed for a broad range of industrial, kiosk, POI and signage applications. it comes with EITX-3000 motherboard, a 1.3 GHz Nano processor, up to 2Gb DDR2 RAM, onboard Chrome 9 graphics solution, one 2.5” SATA drive bay, two Gigabit Ethernet ports, four COM ports, six USB connectors, dual LVDS and a VGA port. Current Status is EOL in VIA website. (http://www.viaembedded.com/en/support/eol/art-3000/) Today I'm going to show you how you can easily replace faulty power adapter. The reason is i'm not able to get the quote and reply from VIA authorized distributor. So this is the fastest way of replacing your own adapter.  The original power adapter is 19V output which is similar to most of laptop's power adapter. Here i bought cheap SGD $30 from Sim Lim tower.  Picture 1 Picture 1 shows 19V original charger. Picture 2 Picture 2 shows HP Laptop charger which is also 19V. So...