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[英]How to plot a stacked bar graph for 1d data(series) using plotly low level interface?
[英]How to open disks in windows and read data at low level?
我知道在 linux 中它就像 /dev/sda 一样简单,但在 Windows 中,您如何打开磁盘并开始读取低级别的数据?
在 python 我试过了:
f = open("K:", "r")
我得到这个错误:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IOError: [Errno 13] Permission denied: 'K:'
即使作为管理员,我也会收到此错误。
来自http://support.microsoft.com/kb/100027
要在基于 Win32 的应用程序中打开物理硬盘驱动器以进行直接磁盘访问(原始 I/O),请使用以下形式的设备名称
\\.\PhysicalDriveN
其中 N 是 0、1、2 等,代表系统中的每个物理驱动器。
要打开逻辑驱动器,直接访问的形式是
\\.\X:
其中 X:是硬盘驱动器分区号、软盘驱动器或 CD-ROM 驱动器。
请记住,windows 和其他操作系统中的所有对象都是文件。 要从驱动器 E 打开和读取 16 字节的数据:使用以下代码:
# Open a Disk in binary format read only 16 bytes
file = "\\\\.\\E:"
with open(file,'rb') as f:
print("Disk Open")
data = f.read(16)
# Convert the binary data to upper case hex ascii code
hex_data = " ".join("{:02X}".format(c) for c in data)
print(hex_data)
两者都为我工作。 要访问分区 C:或整个驱动器,需要管理员权限。 这是一个替换 open() 的示例:
def open_physical_drive(
number,
mode="rb",
buffering=-1,
encoding=None,
errors=None,
newline=None,
closefd=True,
opener=None,
):
"""
Opens a physical drive in read binary mode by default
The numbering starts with 0
"""
return open(
fr"\\.\PhysicalDrive{number}",
mode,
buffering,
encoding,
errors,
newline,
closefd,
opener,
)
def open_windows_partition(
letter,
mode="rb",
buffering=-1,
encoding=None,
errors=None,
newline=None,
closefd=True,
opener=None,
):
"""
Opens a partition of a windows drive letter in read binary mode by default
"""
return open(
fr"\\.\{letter}:", mode, buffering, encoding, errors, newline, closefd, opener
)
# first 16 bytes from partition C:
# on Linux it's like /dev/sda1
with open_windows_partition("C") as drive_c:
print(drive_c.read(16))
# first 16 bytes of first drive
# on Linux it's like /dev/sda
with open_physical_drive(0) as drive_0:
print(drive_0.read(16))
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