Date: Mon, 19 Apr 2010 15:10:39 +0100 From: Tom Evans <tevans.uk@googlemail.com> To: Paul B Mahol <onemda@gmail.com> Cc: Tim Kientzle <kientzle@freebsd.org>, current@freebsd.org, fs@freebsd.org Subject: Re: ISO9660 4GB directory structures boundary limit and growisofs Message-ID: <w2k2e027be01004190710k877314fdv384fab009cef1e9b@mail.gmail.com> In-Reply-To: <t2o3a142e751004190548r39b2c718vde92fb5e10db1062@mail.gmail.com> References: <p2l3a142e751004161607h5ea399e3p182f3c6b10fc9346@mail.gmail.com> <4BC9E254.9070300@freebsd.org> <j2j3a142e751004171011l6fda3f45n8e958ab372b200a7@mail.gmail.com> <t2o3a142e751004190548r39b2c718vde92fb5e10db1062@mail.gmail.com>
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On Mon, Apr 19, 2010 at 1:48 PM, Paul B Mahol <onemda@gmail.com> wrote: > On 4/17/10, Paul B Mahol <onemda@gmail.com> wrote: >> On Sat, Apr 17, 2010 at 4:31 PM, Tim Kientzle <kientzle@freebsd.org> wro= te: >>> Paul B Mahol wrote: >>>> >>>> It is apparently not possible to make use of -use-the-force-luke=3D4gm= s >>>> on FreeBSD when appending new session after 4GB. Mounted disk >>>> afterwards =C2=A0show nothing. >>>> >>>> Should we allow it like linux does? >>> >>> Are you claiming there is a problem when FreeBSD reads such >>> images or a problem with creating such images? =C2=A0What >>> programs are you using? >> >> I burn flac files in multiple sessions, each session have separate >> directory, on DVD+R DL MKM/003 >> After I used 4gms switch mounted fs shows nothing. (but there is >5GB of >> data) >> >> According to growisofs source BD (bluray) dont need this switch at all .= .. >> >>> This sounds like a pretty unsurprising 32-bit truncation >>> bug: =C2=A0the filesystem structures in ISO9660 are all sector >>> numbers so 8TB should be the natural limit (4G sectors >>> times 2k bytes/sector). >> >> I did not tested this on FreeBSD amd64 yet. > > Update: Linux shows all sessions and Windows 7 shows only first one. >From the source code of groisofs.c: * - DVD+R Double Layer support; * - -use-the-force-luke=3D4gms to allow ISO9660 directory structures * to cross 4GB boundary, the option is effective only with DVD+R DL * and for data to be accessible under Linux isofs a kernel patch is * required; So I'm guessing it does something non standard, particularly if windows also refuses to see the data. Cheers Tom
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