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From: brian@anorak.coverform.lan (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Read/Write CDROM strategy
Date: 4 Nov 1996 04:10:26 -0000
Organization: Coverform Ltd.
Lines: 35
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Message-ID: <55jqbi$1ta@anorak.coverform.lan>
References: <kxrE02F6o.CGu@netcom.com>
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In article <kxrE02F6o.CGu@netcom.com>,
kxr@netcom.com (Keith Rich) writes:
:
: I think I could use a Read/Write CDROM to do backup, but I'm not sure
: about the strategy to use. I think the write has to happen all at once,
: so I think I want to dd from a disk image to the raw device. I imagine
: having a disk image the same size as the CDROM, and probably on a scratch
: disk. So, it would work like this.
:
: put the stuff to be backed up on the scratch disk
: dd if=/dev/raw_disk of=/dev/raw_cdrom
:
: The intent here is to end up with a CDROM that can be mounted and looked
: at directly rather than having to restore it to disk first.
:
: Now come the hard questions.
:
: Do I copy the partition stuff as well as the filesystem?
: Can I backup both dos and unix stuff unto the same CDROM?
: Can I end up with a CDROM that I can boot from?
: What about bad blocks? Can I get bad block info off the CDROM first?
: Are there any limits that will preclude the whole idea?
: Has anybody tried this yet?
: What hardware issues are relevant (e.g.: ide versus scsi)?
:
: Comments?
Have a look at "mkisofs". Once you've built your 9660 filesystem, I think
you've gotta look at J"org's "od" driver.
--
Brian <brian%anorak.coverform.lan@awfulhak.demon.co.uk>
<http://www.awfulhak.demon.co.uk/>
Don't _EVER_ lose your sense of humour....
.