Penyediaan Bilik Server

Part 2: Envisioning Phase: Penyediaan Site Prep Experience

Selepas kajian keperluan site prep dikenalpasti, laporan permohonan kelulusan kerja dikemukakan kpd Jabatan Harta . Secara amnya, kerja site prep server room melibatkan 2 keperluan iaitu

Electrical-
Semasa kajian keperluan- pihak vendor telah mengenalpasti dimanakan sumber elektrik yg boleh ditap untuk digunkan pada perkakasan ICS. Iaitu samada:

• Distribution box/tempat switch
• Main switch room – biasanya kat bilik riser. Bilik riser adalah laluan drp bawah k e atas bangunan. Biasanya mengandungi laluan cable letrik dsbnya.
• Sub switch board

DB==>solation(breaker/fius yg turut jadik soket untuk power tinggi)==>UP==>Power distribution Unit(PDU) kat Equipment Rack.

Cable2 letrik akan diletak dalam cable tray(orange color) bawah raised floor supaya tak berselerak.

alternating current

• Single-phase power is what you have in your house. You generally talk about household electrical service as single-phase, 120-volt AC/ alternating current service
• Three-phase Power -The power plant produces three different phases of AC power simultaneously, and the three phases are offset 120 degrees from each other. There are four wires coming out of every power plant: the three phases plus a neutral or ground common to all three. If you were to look at the three phases on a graph, they would look like this relative to ground:
• Direct Current-The alternative to AC is DC, or direct current. Batteries produce DC: A steady stream of electrons flows in one direction only, from the negative to the positive terminal of the battery.

mechanical

• Fire extinquiser
• Air cond.
  Semasa kajian tapak dibuat, engineer agak buat kiraan anggaran heat yang dikeluarkan oleh equipment semasa dan equipment akan baru. Secra amnya, 1kaki persegi bilik kosong hasilkan 60 BTU(British Ternal Unit). Berdasar kiraan heat, maka Horse Power(HP) aircond ditentukan spt 1.5HP, gandaan2x1.5 HP dsbnya
  simple calculation for cooling is power consumed is heat generated. So if your server room need 60W power then you need to plan HVAC for that heat load. You need to check what capacity of HVAC is required
  Perlu 2 unit airocnd . Which works as primary secondary. Dimana akan bergilir2 berfungsi ikut tempoh ditetapkan spt bergili2 setiap 3 jam.
  Aircond starter panel –suis on aircond
  o Tidak boleh guna central aircond spt diruang pejabat. Ini krn aircond tersebut keluarkan air yg boleh rosakkan equipment. Ini krn central aircond biasanya gunakan udara drp luar.
  o Casette aircond =air cond kat siling bilik yg 4 segi sama
  o Jika gunkan aircond disiling, pastikan tidak berada di atas rak utk elak kebocoan.
  o Aircond Outdoor unit mempunyai saluran air yg dibuang kat Aircond Handling Unit/AHU.
  Equipment Rack
  Ketinggian Rack adalah mengikut U. Nih gambar
  Biasanya Rack ada ketinggian 42U, 30U, 16U(biasanya network rack)
  Kena ada KVM-Keyboard Video M
  ensure that your high density server racks (higher number of server or blade chassis) are near to your aircond
  place rack with front facing front and back facing back. Hmm nie ikut konsept macam rumah teres dimana belaknag rack jumpa belakng rack row yg lain. There is no need for cooling between back facing ile. this is called hot ile and this area is suppose to be hot because all server sucks cold air from front and through hot air from back
  Saya dah mula semakin enjoy dgn projek ini. Alhamdulillah banyak perkara baru saya belajar dlm projek ini. Tak semua Apps developer ada peluang belajar atau ada pengalaman penyediaan site prep. He he Saya bukan lagi Apps developer, saya dah jadi Project Coordinator. Tapi hati & jiwa masih sbg Apps Dev.