Tutorial Safecopy ~ Rudie Newbie

Safecopy tools ini di develop oleh Mbah Corvus Corax berfungsi untuk mengrecover data dari drive bad sector tools ini free (GNU-General Public License) safecopy bisa digunakan pada hardisk,pendrive aka flasdisk,dan CD/VCD.

Safecopy 1.6 by CorvusCorax

Usage: safecopy [options]

Options:

--stage1 : Preset to rescue most of the data fast,

using no retries and avoiding bad areas.

Presets: -f 10% -r 10% -R 1 -Z 0 -L 2 -M BaDbLoCk

-o stage1.badblocks

--stage2 : Preset to rescue more data, using no retries

but searching for exact ends of bad areas.

Presets: -f 128* -r 1* -R 1 -Z 0 -L 2

-I stage1.badblocks

-o stage2.badblocks

--stage3 : Preset to rescue everything that can be rescued

using maximum retries, head realignment tricks

and low level access.

Presets: -f 1* -r 1* -R 4 -Z 1 -L 2

-I stage2.badblocks

-o stage3.badblocks

All stage presets can be overridden by individual options.

-b : Blocksize for default read operations.

Set this to the physical sectorsize of your media.

Default: 1*

Hardware block size if reported by OS, otherwise 4096

-f : Blocksize when skipping over badblocks.

Higher settings put less strain on your hardware,

but you might miss good areas in between two bad ones.

Default: 16*

-r : Resolution in bytes when searching for the exact

beginning or end of a bad area.

If you read data directly from a device there is no

need to set this lower than the hardware blocksize.

On mounted filesystems however, read blocks

and physical blocks could be misaligned.

Smaller values lead to very thorough attempts to read

data at the edge of damaged areas,

but increase the strain on the damaged media.

Default: 1*

-R : At least that many read attempts are made on the first

bad block of a damaged area with minimum resolution.

More retries can sometimes recover a weak sector,

but at the cost of additional strain.

Default: 3

-Z : On each error, force seek the read head from start to

end of the source device as often as specified.

That takes time, creates additional strain and might

not be supported by all devices or drivers.

Default: 1

-L : Use low level device calls as specified:

0 Do not use low level device calls

1 Attempt low level device calls

for error recovery only

2 Always use low level device calls

if available

Supported low level features in this version are:

SYSTEM DEVICE TYPE FEATURE

Linux cdrom/dvd bus/device reset

Linux cdrom read sector in raw mode

Linux floppy controller reset, twaddle

Default: 1

--sync : Use synchronized read calls (disable driver buffering).

Safecopy will use O_DIRECT if supported by the OS

and O_SYNC otherwise.

Default: Asynchronous read buffering by the OS is allowed

-s : Start position where to start reading.

Will correspond to position 0 in the destination file.

Default: block 0

-l : Maximum length of data to be read.

Default: Entire size of input file

-I : Incremental mode. Assume the target file already

exists and has holes specified in the badblockfile.

It will be attempted to retrieve more data from

the listed blocks or from beyond the file size

of the target file only.

Warning: Without this option, the destination file

will be emptied prior to writing.

Use -I /dev/null if you want to continue a previous

run of safecopy without a badblock list.

Default: none

-i : Blocksize to interpret the badblockfile given with -I.

Default: Blocksize as specified by -b

-X : Exclusion mode. If used together with -I,

excluded blocks override included blocks.

Safecopy will not read or write any data from

areas covered by exclude blocks.

Default: none

-x : Blocksize to interpret the badblockfile given with -X.

Default: Blocksize as specified by -b

-o : Write a badblocks/e2fsck compatible bad block file.

Default: none

-S : Use external script for seeking in input file.

(Might be useful for tape devices and similar).

Seekscript must be an executable that takes the

number of blocks to be skipped as argv1 (1-64)

the blocksize in bytes as argv2

and the current position (in bytes) as argv3.

Return value needs to be the number of blocks

successfully skipped, or 0 to indicate seek failure.

The external seekscript will only be used

if lseek() fails and we need to skip over data.

Default: none

-M : Mark unrecovered data with this string instead of

skipping it. This helps in later finding corrupted

files on rescued file system images.

The default is to zero unreadable data on creation

of output files, and leaving the data as it is

on any later run.

Warning: When used in combination with

incremental mode (-I) this may overwrite data

in any block that occurs in the -I file.

Blocks not in the -I file, or covered by the file

specified with -X are save from being overwritten.

Default: none

--debug : Enable debug output. Level is a bit field,

add values together for more information:

program flow: 1

IO control: 2

badblock marking: 4

seeking: 8

incremental mode: 16

exclude mode: 32

or for all debug output: 255

Default: 0

-T : Write sector read timing information into

this file for later analysis.

Default: none

-h | --help : Show this text

Valid parameters for -f -r -b options are:

Amount in bytes - i.e. 1024

% Percentage of whole file/device size - e.g. 10%

* -b only, number times blocksize reported by OS

* -f and -r only, number times the value of -b

Description of output:

. : Between 1 and 1024 blocks successfully read.

_ : Read of block was incomplete. (possibly end of file)

The blocksize is now reduced to read the rest.

|/| : Seek failed, source can only be read sequentially.

> : Read failed, reducing blocksize to read partial data.

! : A low level error on read attempt of smallest allowed size

leads to a retry attempt.

[xx](+yy){ : Current block and number of bytes continuously

read successfully up to this point.

X : Read failed on a block with minimum blocksize and is skipped.

Unrecoverable error, destination file is padded with zeros.

Data is now skipped until end of the unreadable area is reached.

< : Successful read after the end of a bad area causes

backtracking with smaller blocksizes to search for the first

readable data.

}[xx](+yy) : current block and number of bytes of recent

continuous unreadable data.

This is free software. You may redistribute copies of it under

the terms of the GNU General Public License version 2 or above. .

There is NO WARRANTY, to the extent permitted by law.

OK Without bacot lebih baik kita mulai deh:

disini saya menggunakan 2 pendrive/flasdisk

flasdisk yang badsector terletak di /dev/sdb1 dan isi/data dari pendrive yang badsector saya akan pindahkan ke /dev/sdc1 yang masih gress baru beli tadi hehheee.........