NOTES FOR COMPTIA

INSTALL O.S. ONTO A NEW DRIVE.  THAT'S HOW YOU PARTITION & FORMAT a new drive Example: Windows costs money. "ubuntu" on Linux is open source **PARTITIONING & FORMATTING  must happen before you use any new mass storage drive!** . . . . . . . . . RAID LEVELS / FILE STORAGE: RAID 0 (striping) = 2 drives sharing bits of data from a big file.  SPEEDS THINGS UP . RAID 1 (mirroring) =  2 drives share identical bits  via mirroring each other on both drives.  Protects against losing everything. Necessary? It's REDUNDANT. Slows things down . RAID 5 (striping w/parity) = uses 3 drives.  First two drives save the old RAID 0 way  but new 3rd drive saves a weird "math parity." clones files via binary math . RAID 6 = uses 4 drives.  First two drives save the old RAID 0 way  but new drives make "math parity" clones of file (via binary math) **Two drives can fail and everything will still be saved** . RAID 10 (striping mirrors) = 4 drives with 2 ...

OPTICAL MEDIA DRIVES (INTERNAL OR EXTERNAL) . . . . . . . . . . INTERNAL HARD DRIVES or EXTERNAL HARD DRIVES . . . . . SOLID STATE DRIVES . . . . . All drives run on LBA = LOGICAL BLOCK ADDRESSING LBA = Little organiser guy who stores stuff in different little units FILE CAPACITY  MB, GB, TB, PETABYTE, EXABYTE . . . . . . . . . . Cpu has trouble communicating with MSDevices KILO (decimal values) <  KIBI blinks  (IEC values)   . . . . . . . . . . OPTICAL MEDIA  = 5.25-inch mass storage . . 3.5-inch mass storage . . 2.5-inch Laptop storage device . . 1.8" Mass storage . . m.2 format mass storage (TINY) . . And THUMB DRIVES . . . . . . . . . . . . . . MAGNETIC DISK DRIVES - A little phonograph needle magnetically writes into SECTORS *HDD . . . . . . . . . . . . . . LBA = LOGICAL BLOCK ADDRESSING LBA language is based on ATA: ADVANCED TECHNOLOGY ATTACHMENT Lots of hard drives speak SATA (serial ATA) . . . . eSATA interfaces a bunch of drives attached to each othe...

PSU block /  POWER SUPPLIES . . . . . Big block that gives your PC power  *they're basically step down transformers Converts AC power to DC power Like puzzle pieces they all fit perfect . . . . . 2 piece ATX POWER CONVERTER  (multi coloured wires - indicate YELLOW 12v , RED 5v , and ORANGE 3.3volt ) ATX12V is typical power for CPU . . . . . . . . SOME OLD ASS COMPUTERS USED "MOLEX" TINY MINI CONNECTOR for floppy drives . . . . . . . . Once again - small black  SATA CONNECTORS . . . . . . . PCIE connectors are for video cards . . . . . . . huge MODULAR CONNECTOR like a big adaptor - so you don't have cables going everywhere Purists say you should use soldered power supply  *not the big MODULAR CONNECTOR . . . . . . . 80PLUS RATINGS GUIDE  (power efficiency rating) . . . . . . . HEAT SINK & HEAT DISSIPATORS - COOLING BAR FINS + FANS for air flow . . . . . . . When systems OVERHEAT they REBOOT BIGGER FANS *LESS NOISY because they TURN SLOWER  (liqui...