Backup to DVD-R

Edmonds, Alan Alan.Edmonds at t-mobile.net
Tue Sep 20 17:17:32 BST 2005


A long time ago in the distant past, I used a nice little buffering =
utility called 'ddd' for buffering cpio/tar output to quarter inch tape. =
 It might still be around.

Alan

> -----Original Message-----
> From: freebsd-users-admin at uk.freebsd.org
> [mailto:freebsd-users-admin at uk.freebsd.org]On Behalf Of Jon Schneider
> Sent: 20 September 2005 17:01
> To: Chris Rodgers
> Cc: freebsd-users at uk.freebsd.org
> Subject: Re: Backup to DVD-R
>=20
>=20
> The general technique goes something like this.
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> mkisofs -various-isooptions stuffwantingburning | cdrecord -cdroptions
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> The main problem is not being able to produce the data fast=20
> enough which
> may or may not be a problem. Experiment with dvd+-rw media and any
> buffer size type options to mkisofs/cdrecord.
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> Using a named pipe to do compression/tarring might go something like
> this.
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> mknod spout p
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> tar czf spout mydata &
> or just
> gzip -c compressable-data >spout &
> (bzip2 very likely too slow)
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> mkisofs -various-isooptions spout | cdrecord -cdroptions
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> I have a suspicion mkisofs will look at the pipe and decide=20
> it's a zero
> length file.
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> You could always write the thing in a format other than ISO.
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> Jon
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> --=20
> Jon Schneider <jon at axismilton.ltd.uk>
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>=20
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>=20




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