20 Nov
2016
20 Nov
'16
2:38 p.m.
Hi All,
Quick question. 32 Bit LinuxOS, Trinity 14.0.
Is there a limit to directory depth ? if so what is it.
Thanks.
--
Best Regards:
Baron
20 Nov
20 Nov
5:42 p.m.
New subject: [trinity-users] Directory depth
On Sun, 20 Nov 2016 14:38:26 +0000
Baron <baron(a)linuxmaniac.net> wrote:
Quick question. 32 Bit LinuxOS, Trinity 14.0.
Is there a limit to directory depth ? if so what is it.
I believe the limit is the length of the path in bytes, which will vary according
to what filesystem you're using, how your kernel is configured, etc.
What documentation I can find suggests 4096 bytes is often set as the limit.
So if you haven't done any special setup and you're using single-character
directory
names on ext4 or similar, that's a bit more than 2000 levels of nesting, although
you might run out of inodes or something first. Using sane directory names
will give you less depth: 7 characters -> ~500 levels.
There is one exception to this: the filesystem normally used for data CDs
seems to have a hard-coded limit of eight directory levels regardless of path
length.
E. Liddell
6:38 p.m.
E. Liddell wrote:
I believe the limit is the length of the path in
bytes, which will vary
according to what filesystem you're using, how your kernel is configured,
etc.
It depends what Baron means. The depth in the classical sense is the number
of nodes you can create in one directory, which is (AFAIR) positive integer
32767.
For the length of the path field, I am not sure - perhaps 4096 - just my
guess now.
regards
7:24 p.m.
New subject: [trinity-users] Directory depth
Hi Guys,
On Sunday 20 November 2016 17:42:26 E. Liddell wrote:
On Sun, 20 Nov 2016 14:38:26 +0000
Baron <baron(a)linuxmaniac.net> wrote:
I think this nails it ! I've been trying to backup a directory to a
DVD and whilst the path gets copied the directory is empty and
nothing gets recorded in it. Net result a DVD with an empty
directory tree.
Thanks both, your quick replies are appreciated.
--
Best Regards:
Baron
Quick question. 32 Bit LinuxOS, Trinity 14.0.
Is there a limit to directory depth ? if so what is it.
I believe the limit is the length of the path in bytes, which will
vary according to what filesystem you're using, how your kernel is
configured, etc.
What documentation I can find suggests 4096 bytes is often set as
the limit. So if you haven't done any special setup and you're
using single-character directory names on ext4 or similar, that's a
bit more than 2000 levels of nesting, although you might run out of
inodes or something first. Using sane directory names will give
you less depth: 7 characters -> ~500 levels.
There is one exception to this: the filesystem normally used for
data CDs seems to have a hard-coded limit of eight directory levels
regardless of path length.
E. Liddell
11:43 p.m.
Baron wrote:
I think this nails it ! I've been trying to
backup a directory to a
DVD and whilst the path gets copied the directory is empty and
nothing gets recorded in it. Net result a DVD with an empty
directory tree.
Thanks both, your quick replies are appreciated.
I've not worked with cd/DVD file systems for many years now, bu I think
there was extention to overcome such limitation.
I would try to create iso image first and inspect it via loop mount.
regards
21 Nov
21 Nov
8:39 a.m.
New subject: [trinity-users] Re: Directory depth
Hi,
On Sunday 20 November 2016 23:43:03 deloptes wrote:
Baron wrote:
Thanks, doing that hadn't occurred to me ! I will try that and let
you know. I was doing a drag n drop to a DVD.
--
Best Regards:
Baron
I think this nails it ! I've been trying to
backup a directory
to a DVD and whilst the path gets copied the directory is empty
and nothing gets recorded in it. Net result a DVD with an empty
directory tree.
Thanks both, your quick replies are appreciated.
I've not worked with cd/DVD file systems for many years now, bu I
think there was extention to overcome such limitation.
I would try to create iso image first and inspect it via loop
mount.
regards 
4:52 p.m.
New subject: [trinity-users] Re: Directory depth
deloptes wrote:
I've not worked with cd/DVD file systems for many
years now, bu I
think
there was extention to overcome such limitation.
I seem to remember K3b (-trinity) complaining... and having to
find/enable Rock Ridge extensions (> 8 directory depth)?
7:37 p.m.
New subject: [trinity-users] Re: Directory depth
Hi All,
On Sunday 20 November 2016 23:43:03 deloptes wrote:
I've not worked with cd/DVD file systems for many
years now, bu I
think there was extention to overcome such limitation.
I would try to create iso image first and inspect it via loop
mount.
regards
Using K3B produces a DVD with a single directory with all the files
and sub directories intact. So from that point of view the data has
been backed up, but unfortunately where the files have come from is
lost. So unless I create an included note of where they come from, I
can't put the data back into the right place.
Thanks:
--
Best Regards:
Baron
11:35 p.m.
Baron wrote:
Hi All,
On Sunday 20 November 2016 23:43:03 deloptes wrote:
The best way to back up is using tar anyway. Is it not an option?
If you wish to have directories, you may need to read about the ISO9660
format
https://en.wikipedia.org/wiki/Universal_Disk_Format
depends on the data you copy to the dvd it might render unusable if you
would expect it to behave as data on a normal filesystem
regards
I've not worked with cd/DVD file systems for
many years now, bu I
think there was extention to overcome such limitation.
I would try to create iso image first and inspect it via loop
mount.
regards
Using K3B produces a DVD with a single directory with all the files
and sub directories intact. So from that point of view the data has
been backed up, but unfortunately where the files have come from is
lost. So unless I create an included note of where they come from, I
can't put the data back into the right place.
Thanks: 
25 Nov
25 Nov
11:04 a.m.
New subject: [trinity-users] Re: Re: Directory depth
On 2016-11-21 17:35:21 deloptes wrote:
Baron wrote:
You might also want to take a look at dar.
Leslie
Hi All,
On Sunday 20 November 2016 23:43:03 deloptes wrote:
The best way to back up is using tar anyway. Is it not an option?
If you wish to have directories, you may need to read about the ISO9660
format
https://en.wikipedia.org/wiki/Universal_Disk_Format
depends on the data you copy to the dvd it might render unusable if you
would expect it to behave as data on a normal filesystem
I've not worked with cd/DVD file systems for
many years now, bu I
think there was extention to overcome such limitation.
I would try to create iso image first and inspect it via loop
mount.
regards
Using K3B produces a DVD with a single directory with all the files
and sub directories intact. So from that point of view the data has
been backed up, but unfortunately where the files have come from is
lost. So unless I create an included note of where they come from, I
can't put the data back into the right place.
Thanks:
1 p.m.
New subject: [trinity-users] Re: Re: Directory depth
Hi Leslie
On Friday 25 November 2016 11:04:46 Leslie Turriff wrote:
Yes I will do that, again I've never heard of "dar"
On 2016-11-21 17:35:21 deloptes wrote:
> Baron wrote:
> > Hi All,
> >
> > On Sunday 20 November 2016 23:43:03 deloptes wrote:
> >> I've not worked with cd/DVD file systems for many years now,
> >> bu I think there was extention to overcome such limitation. I
> >> would try to create iso image first and inspect it via loop
> >> mount.
> >>
> >> regards
> >
> > Using K3B produces a DVD with a single directory with all the
> > files and sub directories intact. So from that point of view
> > the data has been backed up, but unfortunately where the files
> > have come from is lost. So unless I create an included note of
> > where they come from, I can't put the data back into the right
> > place.
> >
> > Thanks:
>
> The best way to back up is using tar anyway. Is it not an option?
> If you wish to have directories, you may need to read about the
> ISO9660 format
>
> https://en.wikipedia.org/wiki/Universal_Disk_Format
Thank you for this link. Very informative. There is a lot there that
I simply had no idea about.
depends on the
data you copy to the dvd it might render unusable
if you would expect it to behave as data on a normal filesystem
You might also want to take a look at dar. Leslie
--
Best Regards:
Baron
27 Nov
27 Nov
2:37 a.m.
New subject: [trinity-users] Re: Re: Directory depth
On 2016-11-25 07:00:11 Baron wrote:
Hi Leslie
On Friday 25 November 2016 11:04:46 Leslie Turriff wrote:
Yes I will do that, again I've never heard of "dar"
From info dar
(http://dar.linux.free.fr/):
dar is a full featured backup tool, aimed for disks (floppy, CD-R(W),
DVD-R(W), zip, jazz, etc.) and since release 2.4.0 adapted to tapes.
dar can store a backup in several files (called "slices" in the follow-
ing) of a given size, eventually pausing or running a user com-
mand/script before starting the next slice. This can allow for example,
the burning of the last generated slice on a CD-R, or changing a floppy
disk before continuing on the next one. Like its grand-brother, the
great "tar" command, dar may also use compression, at the difference
that compression is used inside the archive to be able to have com-
pressed slices of the defined size. But the most important feature of
dar is its ability to make differential backups. In other words, back-
ups that contain only new files or files that have changed from a
backup of reference. Moreover with differential backup, dar also
stores files that have been deleted since the backup of reference.
Thus, when restoring, first a full backup, then additional differential
backups, at each restoration you get the exact state of the filesystem
at the time of the backup. And of course, the reference backup may be a
full or a differential backup itself.
dar also can make encrypted backups.
On 2016-11-21 17:35:21 deloptes wrote:
> Baron wrote:
> > Hi All,
> >
> > On Sunday 20 November 2016 23:43:03 deloptes wrote:
> >> I've not worked with cd/DVD file systems for many years now,
> >> bu I think there was extention to overcome such limitation. I
> >> would try to create iso image first and inspect it via loop
> >> mount.
> >>
> >> regards
> >
> > Using K3B produces a DVD with a single directory with all the
> > files and sub directories intact. So from that point of view
> > the data has been backed up, but unfortunately where the files
> > have come from is lost. So unless I create an included note of
> > where they come from, I can't put the data back into the right
> > place.
> >
> > Thanks:
>
> The best way to back up is using tar anyway. Is it not an option?
> If you wish to have directories, you may need to read about the
> ISO9660 format
>
> https://en.wikipedia.org/wiki/Universal_Disk_Format
Thank you for this link. Very informative. There is a lot there that
I simply had no idea about.
depends
on the data you copy to the dvd it might render unusable
if you would expect it to behave as data on a normal filesystem
You might also want to take a look at dar. > Leslie
28 Nov
28 Nov
2:39 p.m.
New subject: [trinity-users] Re: Re: Directory depth
Hi Leslie, Guys,
On Sunday 27 November 2016 02:37:51 Leslie Turriff wrote:
On 2016-11-25 07:00:11 Baron wrote:
I have been and had a look at "dar" it looks like the answer to
getting the files backed up with a complete directory tree.
Thanks again.
--
Best Regards:
Baron
Hi Leslie
On Friday 25 November 2016 11:04:46 Leslie Turriff wrote:
Yes I will do that, again I've never heard of "dar"
From info dar (http://dar.linux.free.fr/):
dar is a full featured backup tool, aimed for disks
(floppy, CD-R(W), DVD-R(W), zip, jazz, etc.) and since release
2.4.0 adapted to tapes.
dar can store a backup in several files (called "slices" in
the follow- ing) of a given size, eventually pausing or
running a user com- mand/script before starting the next slice.
This can allow for example, the burning of the last generated slice
on a CD-R, or changing a floppy disk before continuing on the next
one. Like its grand-brother, the great "tar" command, dar
may also use compression, at the difference that compression is
used inside the archive to be able to have com- pressed slices
of the defined size. But the most important feature of dar is its
ability to make differential backups. In other words, back- ups
that contain only new files or files that have changed from a
backup of reference. Moreover with differential backup, dar
also stores files that have been deleted since the backup of
reference. Thus, when restoring, first a full backup, then
additional differential backups, at each restoration you get the
exact state of the filesystem at the time of the backup. And of
course, the reference backup may be a full or a differential backup
itself.
dar also can make encrypted backups.
> > Leslie On 2016-11-21 17:35:21 deloptes wrote:
> Baron wrote:
> > Hi All,
> >
> > On Sunday 20 November 2016 23:43:03 deloptes wrote:
> >> I've not worked with cd/DVD file systems for many years
> >> now, bu I think there was extention to overcome such
> >> limitation. I would try to create iso image first and
> >> inspect it via loop mount.
> >>
> >> regards
> >
> > Using K3B produces a DVD with a single directory with all
> > the files and sub directories intact. So from that point
> > of view the data has been backed up, but unfortunately
> > where the files have come from is lost. So unless I create
> > an included note of where they come from, I can't put the
> > data back into the right place.
> >
> > Thanks:
>
> The best way to back up is using tar anyway. Is it not an
> option? If you wish to have directories, you may need to read
> about the ISO9660 format
>
> https://en.wikipedia.org/wiki/Universal_Disk_Format
Thank you for this link. Very informative. There is a lot there
that I simply had no idea about.
depends
on the data you copy to the dvd it might render
unusable if you would expect it to behave as data on a normal
filesystem
You might also want to take a look at dar.
2706
days inactive
2714
days old
13 comments
5 participants
participants (5)
-
Baron -
Dave Lers -
deloptes -
E. Liddell -
Leslie Turriff