burning CD-Roms over the network
I found this very useful, to pull a backup from a host out of physical reach.
One way to remotely burn CDs is by using
somehow i couldn't get this working through an ssh tunnel. The ssh-only method proved to be more successful
One way to remotely burn CDs is by using
rscsi[1] from within cdrecord[2]cdrecord dev=REMOTE:user@host:0,0,0 speed=0 .... theimage.iso
we're behind a NAT, so first init. a tunnel
on the remotehost we can now do
if cdrecord says something like ...
... chances are, that DMA is not enabled on the cdrom device
(where X is the device)
another variant is to pipe mkisofs output directly to cdrecord
getting data-track size first
then:
In order to make cdrecord suid root and executable for other users:
obviously this works without the portforwarding as well ...
ssh -l user -R 4001:localhost:22 remotehost
on the remotehost we can now do
ssh -l localuser -p 4001 localhost "cdrecord dev=0,0,0 speed=0 -v -eject -"
< theimage.iso
if cdrecord says something like ...
Track 01: 0 of 168 MB written.
/usr/bin/cdrecord: Input/output error. write_g1: scsi sendcmd: no error
CDB: 2A 00 00 00 00 00 00 00 1F 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 03 00 00 00 00 0A 00 00 00 00 73 03 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x73 Qual 0x03 (power calibration area error) Fru 0x0
Sense flags: Blk 0 (not valid)
... chances are, that DMA is not enabled on the cdrom device
hdparm -d1 -c1 /dev/hdX(where X is the device)
another variant is to pipe mkisofs output directly to cdrecord
getting data-track size first
mkisofs -r -J -q -print-size /dir/with/data
then:
mkisofs -r -J [moreoptions] /dir/with/data |
ssh -l localuser -p 4001 localhost "cdrecord dev=0,0,0 speed=0 -tszie=XXXs -v -eject -"
where XXX is the output of the formerly issued mkisofs commandIn order to make cdrecord suid root and executable for other users:
chmod 4755 `which cdrecord`obviously this works without the portforwarding as well ...
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