Categories
Hardware

Linux 下安装识别 Marvell 88SE91xx 硬盘

88SE91xx 可以使用 AHCI 驱动,但是默认 Linux 无法识别 88SE91xx 需要手动添加到 AHCI 列表中。方法如下。

  • 首先获得到 88SE91xx 的 Vendor ID 和 Device ID
$ lspci -nnk | grep Marvell
04:00.0 RAID bus controller [0104]: Marvell Technology Group Ltd. 88SE9172 SATA III 6Gb/s RAID Controller [1b4b:9192] (rev 11)
  • 使 AHCI 识别
$ /bin/echo 1b4b 9192 > /sys/bus/pci/drivers/ahci/new_id

 

这样就能识别到在 88SE91xx 上的硬盘了。

Categories
Hardware Storage

bit, nybble, byte, WORD, DWORD, QWORD

It depends on the computer architecture.

For 32bit,

bit = …1 bit…

nybble = 4 bits = 1/2 byte

byte = 8 bits = 2 nybbles

WORD = 2 bytes = 4 nybbles = 16 bits

DWORD = 2 WORDs = 4 bytes = 8 nybbles = 32 bits

QWORD = 2 DWORDs = 4 WORDs = ….. = 64 bits

 

On 64bit system, it will be double.