11-22-2013
There are two things I can do (that I know of) to "unmount" in windows. I can go into the windows disk manager and do "remove" to the drive letter. After this is done, the drive no longer appears in windows explorer. I can also use easeus partition master to "hide" the partition. I don't know if that does anything different than removing the drive letter in disk manager. For both of these methods, the change seems to be persistent, meaning that is survives rebooting.
I don't know if either of these actions provides any protection from cryptolocker because I can't seem to find anyone who will tell me how cryptolocker goes about assembling the list of files that it encrypts. I know it uses a list of extensions, but I don't know how it assembles the list of paths where it looks. I am guessing that it would not find files on a drive without a drive letter, and I also doubt that it can mount a partition on it's own, but those are both just guesses.
I don't like guessing about whether or not my files are still going to be there in the morning.
LMHmedchem
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SD(4) Linux Programmer's Manual SD(4)
NAME
sd - driver for SCSI disk drives
SYNOPSIS
#include <linux/hdreg.h> /* for HDIO_GETGEO */
#include <linux/fs.h> /* for BLKGETSIZE and BLKRRPART */
CONFIGURATION
The block device name has the following form: sdlp, where l is a letter denoting the physical drive, and p is a number denoting the parti-
tion on that physical drive. Often, the partition number, p, will be left off when the device corresponds to the whole drive.
SCSI disks have a major device number of 8, and a minor device number of the form (16 * drive_number) + partition_number, where drive_num-
ber is the number of the physical drive in order of detection, and partition_number is as follows:
+3 partition 0 is the whole drive
partitions 1-4 are the DOS "primary" partitions
partitions 5-8 are the DOS "extended" (or "logical") partitions
For example, /dev/sda will have major 8, minor 0, and will refer to all of the first SCSI drive in the system; and /dev/sdb3 will have
major 8, minor 19, and will refer to the third DOS "primary" partition on the second SCSI drive in the system.
At this time, only block devices are provided. Raw devices have not yet been implemented.
DESCRIPTION
The following ioctls are provided:
HDIO_GETGEO
Returns the BIOS disk parameters in the following structure:
struct hd_geometry {
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
};
A pointer to this structure is passed as the ioctl(2) parameter.
The information returned in the parameter is the disk geometry of the drive as understood by DOS! This geometry is not the physical
geometry of the drive. It is used when constructing the drive's partition table, however, and is needed for convenient operation of
fdisk(1), efdisk(1), and lilo(1). If the geometry information is not available, zero will be returned for all of the parameters.
BLKGETSIZE
Returns the device size in sectors. The ioctl(2) parameter should be a pointer to a long.
BLKRRPART
Forces a reread of the SCSI disk partition tables. No parameter is needed.
The SCSI ioctl(2) operations are also supported. If the ioctl(2) parameter is required, and it is NULL, then ioctl(2) fails with
the error EINVAL.
FILES
/dev/sd[a-h]
the whole device
/dev/sd[a-h][0-8]
individual block partitions
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 SD(4)