- data sheets can tell you what's there, but omissions in data (eg ESD) can bite you
Slow blow fuses:
- L - Low Breaking Capacity (ie glass)
- H - High Breaking Capacity (ie ceramic)
- symbol: V (sometimes E)
- measured in volts
- voltage is between 2 points
- symbol: I
- measured in amps
- current is through a circuit
dnf install -y fedora-arm-installer
fedora-arm-image-installer --image=</path/to/fedora_image> --target=<RPi_Version> --media=/dev/<sd_card_device> --resizefs- 115200 baud rate
- 3.3V logic
Because of a firmware issue, need to add this to /boot/config.txt:
enable_uart=1
show /SYS/LOCATE
set /SYS/LOCATE value=Fast_Blink
stop /SYS
- Red +5V power
- Black Ground
- White Data (-)
- Green Data (+)
| Level | Data distribution | Performance | Space availability | Redundancy | | 0 | Data is striped over multiple disks. | Higher read/write perf, since it's split over disks | All disks are available as one pool | None - loss of one disk is catastrophic | | 1 | Available disk is effectively halved. | Data is mirrored over multiple disks | Read performance increased since multiple blocks can be accessed at the same time. Write perf declines since data must be written twice | Loss of 1 disk is non-catastrophic | | 4 | Data striped over multiple disks. Parity information on separate disk | Read operations benefit by striping. Writes are bottlenecked on the parity disk | More efficient use of data redundancy with parity disk | If parity disk is lost, data redundancy is lost | | 5 | Data and parity striped over multiple disks | Read operations benefit by striping | | Can only handle one disk failure before data loss | | 6 | Data and dual parity blocks striped over multiple disks | Read operations benefit by striping | | Can handle two disk failures before data loss | | 10 | Hybridizing of 1 + 0, striping over mirrored sets | Read operations benefit by striping | | |