dvdisaster(1) - Linux man page

Name

Synopsis

Description

Typical Usage

dvdisaster -d /dev/hdc -s

Scans the medium in drive /dev/hdc for errors.

dvdisaster -d /dev/hdc -i medium.iso -r

Reads an image from drive /dev/hdc into the file medium.iso.

dvdisaster -d /dev/hdc -i medium.iso --read-raw -r

Creates an image as described above. Each sector's integrity is verified by using its EDC and L-EC raw data. Only possible for CD media; otherwise the --read-raw option is silently ignored.

dvdisaster -d /dev/hdc -i medium.iso --read-attempts n-m -r

Creates an image as described above. Defective sectors are retried at least n times and at most m times. Recovery of defective CD media may improve when combined with --read-raw.

dvdisaster -d /dev/hdc -i medium.iso -e corr.ecc -r --adaptive-read

Uses the adaptive reading strategy to read an image from drive /dev/hdc into the file medium.iso. Reading will stop when enough data has been gathered to repair the image using the error correction file corr.ecc.

dvdisaster -i medium.iso -e corr.ecc -c

Creates an error correction file corr.ecc for the image medium.iso.

dvdisaster -i medium.iso -mRS02 -n 350000 -c

Augments the image medium.iso with error correction information, expanding the image to no more than 350000 sectors. If -n is omitted the image will be expanded to the smallest possible medium size (CD, DVD, DVD9). Note the missing blank between -m and RS02.

dvdisaster -i medium.iso -e corr.ecc -f

Repairs the image file medium.iso using the error correction file corr.ecc.

dvdisaster -i medium.iso -e corr.ecc -t

Verifies the image medium.iso with information from the error correction file corr.ecc.

NOTE:

Omit the -e corr.ecc options when working with augmented images in the examples above.

Options

-r, --read

Read the medium image to hard disc. Use -rn-m to read a certain sector range, e.g. -r100-200.

-c, --create

Create .ecc information for the medium image.

-f, --fix

Try to fix medium image using .ecc information.

-s, --scan

Scan the medium for read errors.

-t, --test

Test integrity of the .iso and .ecc files.

-u, --unlink

Delete .iso files (when other actions complete).

Drive and file specification:

-d, --device device

read from given device (default: /dev/cdrom).

-p, --prefix prefix

prefix of .iso/.ecc file (default: medium.* ).

-i, --image imagefile

name of image file (default: medium.iso).

-e, --ecc eccfile

name of parity file (default: medium.ecc).

--list

lists available drives for the ASPI driver (Windows only).

Tweaking options (see manual before using!):

-j, --jump n

jump n sectors forward after a read error (default: 16).

-n, --redundancy n[unit]

Error correction data redundancy. Allowed values depend on the codec:

RS01 error correction files

-n x creates error correction file with x roots.

-n x% creates error correction file with x percent redundancy.

-n xm creates error correction file of approx. x MB size.

-n normal - optimized codec for 14.3% redundancy/32 roots.

-n high - optimized codec for 33.5% redundancy/64 roots.

RS02 images:

-n CD augments image suitable for CD media.

-n DVD augments image suitable for DVD media.

-n DVD9 augments image suitable for DVD9 media.

-n BD augments image suitable for BD media.

-n BD2 augments image suitable for two layered BD media.

-n x augments image using approx. x sectors in total.

-n x% augments image with approx. x% redundancy.

-n xr augments image with x roots error correction data.

-m, --method n

lists/selects error correction methods (default: RS01).

Possible values are RS01 and RS02.

-v, --verbose n%

more diagnostic messages

--adaptive-read

use optimized strategy for reading damaged media.

--auto-suffix

automatically add .iso and .ecc file suffixes.

--cache-size n

image cache size in MB during -c mode (default: 32MB).

--dao

assume DAO disc; do not trim image end.

--driver d (Linux only)

Chooses between the cdrom (CDROM_SEND_PACKET) driver and the sg (SG_IO) driver for optical drives. Currently the older cdrom driver is pre-selected; starting with dvdisaster V0.80 the newer sg driver will be the default. Both drivers should work equally well, anyways.

--eject

eject medium after successful read.

--fill-unreadable n

fill unreadable sectors with byte n

--ignore-fatal-sense

continue reading after potentially fatal error condition.

--internal-rereads n

internal read attempts for defective CD media sectors (default: -1)

The drive firmware usually retries unreadable sectors a few times before giving up and returning a read error. It is more efficient to set this to 0 or 1 and manage read attempts through the --read-attempts parameter. Most drives ignore this setting anyways. Use -1 to leave the drive at its default setting.

--query-size n

queries drive or filesystem on medium for image size (default: ecc)

Possible values are: drive udf ecc

--raw-mode n

selects raw reading mode for CD media (default: 20)

The recommended mode is 20, which makes the drive apply its built-in error correction to the best possible extent before transfering a defective sector. However some drives can only read defective sectors using mode 21, skipping the last stage of the internal error correction and returning the uncorrected sector instead.

--read-attempts n-m

attempts n upto m reads of a defective sector.

--read-medium n

read the whole medium up to n times.

--read-raw

performs read in raw mode if possible.

--speed-warning n

print warning if speed changes by more than n percent.

--spinup-delay n

wait n seconds for drive to spin up.

--split-files

split image into files <= 2GB.

See Also

Author

This manual page was written by Daniel Baumann <daniel.baumann@panthera-systems.net>, for the Debian project (but may be used by others). It was enhanced for V0.70/0.72 by Carsten Gnoerlich.