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Groups > linux.debian.user > #263160
| From | "Thomas Schmitt" <scdbackup@gmx.net> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: How to use dmsetuup? |
| Date | 2023-11-05 23:20 +0100 |
| Message-ID | <HwTDj-3ow1-3@gated-at.bofh.it> (permalink) |
| References | <HwRLb-3nfd-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hi, David Christensen wrote: > Adding checksum file(s) to the contents burned to disc is an important step > that should not be omitted I let xorriso compute and store the checksums in a non-file block range at the end of the ISO filesystem. Each file gets an AAIP attribute which points to an MD5 in this checksum array. The user only has to issue the xorriso command -for_backup or -md5 "on". I wrote: > > i only once in my life watched a DVD giving bad data without an SCSI > > error. David Christensen wrote: > Interesting. My WAG is that there was a marginal/ ambiguous dot on disc (?). The astonishing fact is not the damaged data chunk but the drive's failure to recognize the damage. There are substantial parity data wrapped around each DVD "ECC Block" which the drive may use for error detection and possibly for correction. If i count correctly in MMC-5 Figure 26, then 32 KiB payload data get added 192 * 10 + 15 * 182 = 4650 bytes of parity data. ECMA-337 (about DVD+RW) mentions in 13.1 two more checksums with 6 bytes per 2048 bytes of payload data. With such much of redundancy it is highly unlikely that an alteration stays undetected or that an error correction yields a wrong result. Nevertheless in this special combination of medium and drive the error was not reported or corrected by the drive but rather a wrong data chunk was handed out. At that occasion an MD5 recorded by xorriso indicated the error. Comparing the read results on several drives showed that it was about a single ECC block of 32 KiB payload. > I seem to recall a post by you that indicated *BSD lacked the features > needed for good optical drive/ media/ format support. I have difficulties to remember ... > Can I get xorriso(1) on FreeBSD? I don't have a FreeBSD test machine any more. So we have to rely on the web ... xorriso seems to be available in the versions as in Sid (1.5.6) and Buster (1.5.0): https://www.freshports.org/sysutils/xorriso/ GNU xorriso should compile on FreeBSD out of the box: https://www.gnu.org/software/xorriso/#download Older versions available on https://ftp.gnu.org/gnu/xorriso User experience reports are welcome. Have a nice day :) Thomas
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How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-03 17:30 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-03 17:50 +0100
Re: How to use dmsetuup? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-03 18:10 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-03 22:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 01:00 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-04 01:50 +0100
Re: How to use dmsetuup? "Andrew M.A. Cater" <amacater@einval.com> - 2023-11-03 23:20 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 01:10 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 12:50 +0100
Re: How to use dmsetuup? <tomas@tuxteam.de> - 2023-11-04 14:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 18:30 +0100
Re: How to use dmsetuup? tomas@tuxteam.de - 2023-11-04 19:40 +0100
Re: How to use dmsetuup? debian-user@howorth.org.uk - 2023-11-04 21:50 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-04 22:40 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 23:30 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 00:40 +0100
Re: How to use dmsetuup? yxcv@vienna.at - 2023-11-05 01:10 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-05 02:00 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 04:20 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-05 05:10 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 07:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-05 10:50 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 11:30 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-05 16:30 +0100
Re: How to use dmsetuup? "Thomas Schmitt" <scdbackup@gmx.net> - 2023-11-05 09:10 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 21:20 +0100
Re: How to use dmsetuup? debian-user@howorth.org.uk - 2023-11-05 21:50 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 23:30 +0100
Re: How to use dmsetuup? "Thomas Schmitt" <scdbackup@gmx.net> - 2023-11-05 23:20 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-05 23:50 +0100
Re: How to use dmsetuup? "Thomas Schmitt" <scdbackup@gmx.net> - 2023-11-06 08:40 +0100
xorriso and SIGTERM/SIGINT handler (was: Re: How to use dmsetuup?) Max Nikulin <manikulin@gmail.com> - 2023-11-06 05:30 +0100
Re: xorriso and SIGTERM/SIGINT handler "Thomas Schmitt" <scdbackup@gmx.net> - 2023-11-06 09:00 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 23:10 +0100
Re: How to use dmsetuup? Andy Smith <andy@strugglers.net> - 2023-11-04 10:40 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-04 13:30 +0100
Re: How to use dmsetuup? Franco Martelli <martellif67@gmail.com> - 2023-11-06 16:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-06 17:30 +0100
Re: How to use dmsetuup? Tom Dial <tddial@comcast.net> - 2023-11-08 00:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-08 01:30 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-08 06:10 +0100
Re: How to use dmsetuup? <tomas@tuxteam.de> - 2023-11-08 06:40 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-08 11:30 +0100
Re: How to use dmsetuup? "Andrew M.A. Cater" <amacater@einval.com> - 2023-11-08 19:10 +0100
Re: How to use dmsetuup? jeremy ardley <jeremy.ardley@gmail.com> - 2023-11-08 23:00 +0100
Re: How to use dmsetuup? Tom Dial <tddial@comcast.net> - 2023-11-09 02:10 +0100
Re: How to use dmsetuup? David Christensen <dpchrist@holgerdanske.com> - 2023-11-11 01:50 +0100
Re: How to use dmsetuup? gene heskett <gheskett@shentel.net> - 2023-11-11 04:30 +0100
Hardware for a back up server? [WAS Re: How to use dmsetuup?] "Andrew M.A. Cater" <amacater@einval.com> - 2023-11-11 18:00 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-11 18:10 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Pocket <pocket@columbus.rr.com> - 2023-11-11 18:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-11 19:50 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Pocket <pocket@columbus.rr.com> - 2023-11-11 21:50 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] gene heskett <gheskett@shentel.net> - 2023-11-11 22:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Jeffrey Walton <noloader@gmail.com> - 2023-11-11 22:10 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Jeffrey Walton <noloader@gmail.com> - 2023-11-12 00:30 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Dan Ritter <dsr@randomstring.org> - 2023-11-12 00:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] fxkl47BF@protonmail.com - 2023-11-11 18:30 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] David Christensen <dpchrist@holgerdanske.com> - 2023-11-12 01:10 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-12 05:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-11-13 11:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-13 14:00 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Andy Smith <andy@strugglers.net> - 2023-11-12 14:20 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] David Christensen <dpchrist@holgerdanske.com> - 2023-11-12 19:40 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] "Andrew M.A. Cater" <amacater@einval.com> - 2023-11-12 18:20 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] David Christensen <dpchrist@holgerdanske.com> - 2023-11-12 20:30 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-12 21:20 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] <tomas@tuxteam.de> - 2023-11-13 06:40 +0100
Linux supprt (was: Hardware for a back up server? [WAS Re: How to use dmsetuup?]) Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-13 13:50 +0100
Re: Linux supprt (was: Hardware for a back up server? [WAS Re: How to use dmsetuup?]) Larry Martell <larry.martell@gmail.com> - 2023-11-13 16:00 +0100
Re: Linux supprt Stefan Monnier <monnier@iro.umontreal.ca> - 2023-11-13 16:40 +0100
Re: Linux supprt Nicholas Geovanis <nickgeovanis@gmail.com> - 2023-11-13 22:50 +0100
Re: Linux supprt John Hasler <john@sugarbit.com> - 2023-11-13 19:00 +0100
Re: Linux supprt <tomas@tuxteam.de> - 2023-11-13 19:40 +0100
Re: Linux supprt Nicholas Geovanis <nickgeovanis@gmail.com> - 2023-11-14 18:40 +0100
Re: Linux supprt <tomas@tuxteam.de> - 2023-11-14 18:50 +0100
Re: Hardware for a back up server? [WAS Re: How to use dmsetuup?] Joe <joe@jretrading.com> - 2023-11-13 15:10 +0100
Re: How to use dmsetuup? Tom Dial <tddial@comcast.net> - 2023-11-09 01:50 +0100
Re: How to use dmsetuup? Andy Smith <andy@strugglers.net> - 2023-11-09 16:20 +0100
Re: How to use dmsetuup? debian-user@howorth.org.uk - 2023-11-09 17:50 +0100
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