Re: using a disk "mirrored" with dd
> > Matt <[EMAIL PROTECTED]> wrote: > > > I have a machine running 4.10-RELEASE-p2 with two identical hard disks > > -- ad0 and ad2. I would like to make a complete copy of the first disk > > to the second disk nightly for quick disaster recovery. > > > > I've dd'ed the disk as follows > > > > # dd if=/dev/ad0 of=/dev/ad2 > > > > and edited the disklabel of the second disk to change ad0s1 to ad2s1 as follows > > > > # disklabel -e -r ad2 > > > > However, I'm still unable to mount the root partion (or any other > > partition) of the second disk to tweak /etc/fstab etc. even though > > > > # mount /dev/ad2s1a /mnt > > mount: /dev/ad2s1a: Operation not permitted Not an answer to your specific question, but I would suggest doing the whole thing a little differently. First fdisk, disklabel and newfs the drive to make the filesystems you want, including making the slice bootable, etc. Then copy each filesystem on the previous disk using dump(8)/restore(8). If you have enough scratch space, you can dump to files in spare space and then restore from those. Or, you can pipe a dump to a restore. It is preferable to using dd for something like this. jerry > > What is your securelevel? See man securelevel. > > > > > What am I missing? Is there anything else I need to do beyond editing > > the disklabel to allow me to use the "mirrored" disk? > > > > Output of disklabel for the two disks follows: > > > > # disklabel ad0 > > # /dev/ad0c: > > type: ESDI > > disk: ad0s1 > > label: > > flags: > > bytes/sector: 512 > > sectors/track: 63 > > tracks/cylinder: 255 > > sectors/cylinder: 16065 > > cylinders: 4864 > > sectors/unit: 78156162 > > rpm: 3600 > > interleave: 1 > > trackskew: 0 > > cylinderskew: 0 > > headswitch: 0 # milliseconds > > track-to-track seek: 0 # milliseconds > > drivedata: 0 > > > > 8 partitions: > > #size offsetfstype [fsize bsize bps/cpg] > > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > > b: 5242880 409600 swap# (Cyl. 25*- 351*) > > c: 781561620unused0 0 # (Cyl.0 - 4864*) > > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > > > # disklabel ad2 > > # /dev/ad2c: > > type: ESDI > > disk: ad2s1 > > label: > > flags: > > bytes/sector: 512 > > sectors/track: 63 > > tracks/cylinder: 255 > > sectors/cylinder: 16065 > > cylinders: 4864 > > sectors/unit: 78156162 > > rpm: 3600 > > interleave: 1 > > trackskew: 0 > > cylinderskew: 0 > > headswitch: 0 # milliseconds > > track-to-track seek: 0 # milliseconds > > drivedata: 0 > > > > 8 partitions: > > #size offsetfstype [fsize bsize bps/cpg] > > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > > b: 5242880 409600 swap# (Cyl. 25*- 351*) > > c: 781561620unused0 0 # (Cyl.0 - 4864*) > > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > > > Thanks for any insight, and let me know if you need to see anything else. > > > > -Matt > > ___ > > [EMAIL PROTECTED] mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > > > -- > Bill Moran > Potential Technologies > http://www.potentialtech.com > ___ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: using a disk "mirrored" with dd
Matt <[EMAIL PROTECTED]> wrote: > I have a machine running 4.10-RELEASE-p2 with two identical hard disks > -- ad0 and ad2. I would like to make a complete copy of the first disk > to the second disk nightly for quick disaster recovery. > > I've dd'ed the disk as follows > > # dd if=/dev/ad0 of=/dev/ad2 > > and edited the disklabel of the second disk to change ad0s1 to ad2s1 as follows > > # disklabel -e -r ad2 > > However, I'm still unable to mount the root partion (or any other > partition) of the second disk to tweak /etc/fstab etc. even though > > # mount /dev/ad2s1a /mnt > mount: /dev/ad2s1a: Operation not permitted What is your securelevel? See man securelevel. > > What am I missing? Is there anything else I need to do beyond editing > the disklabel to allow me to use the "mirrored" disk? > > Output of disklabel for the two disks follows: > > # disklabel ad0 > # /dev/ad0c: > type: ESDI > disk: ad0s1 > label: > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 4864 > sectors/unit: 78156162 > rpm: 3600 > interleave: 1 > trackskew: 0 > cylinderskew: 0 > headswitch: 0 # milliseconds > track-to-track seek: 0 # milliseconds > drivedata: 0 > > 8 partitions: > #size offsetfstype [fsize bsize bps/cpg] > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > b: 5242880 409600 swap# (Cyl. 25*- 351*) > c: 781561620unused0 0 # (Cyl.0 - 4864*) > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > # disklabel ad2 > # /dev/ad2c: > type: ESDI > disk: ad2s1 > label: > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 4864 > sectors/unit: 78156162 > rpm: 3600 > interleave: 1 > trackskew: 0 > cylinderskew: 0 > headswitch: 0 # milliseconds > track-to-track seek: 0 # milliseconds > drivedata: 0 > > 8 partitions: > #size offsetfstype [fsize bsize bps/cpg] > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > b: 5242880 409600 swap# (Cyl. 25*- 351*) > c: 781561620unused0 0 # (Cyl.0 - 4864*) > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > Thanks for any insight, and let me know if you need to see anything else. > > -Matt > ___ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" -- Bill Moran Potential Technologies http://www.potentialtech.com ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: using a disk "mirrored" with dd
On Tue, 3 Aug 2004 08:43:24 +0200 (CEST), Konrad Heuer <[EMAIL PROTECTED]> wrote: > > > > On Tue, 3 Aug 2004, Matt wrote: > > > I have a machine running 4.10-RELEASE-p2 with two identical hard disks > > -- ad0 and ad2. I would like to make a complete copy of the first disk > > to the second disk nightly for quick disaster recovery. > > > > I've dd'ed the disk as follows > > > > # dd if=/dev/ad0 of=/dev/ad2 > > > > and edited the disklabel of the second disk to change ad0s1 to ad2s1 as follows > > > > # disklabel -e -r ad2 > > > > However, I'm still unable to mount the root partion (or any other > > partition) of the second disk to tweak /etc/fstab etc. even though > > > > # mount /dev/ad2s1a /mnt > > mount: /dev/ad2s1a: Operation not permitted > > [snip] > > Thanks for any insight, and let me know if you need to see anything else. > > Did you do the dd-copy while the system was running multi-user from the > first disk? I'd expect larger problems then because the file systems > inconsistencies on the second disk may never be resolved. > > If you did it in single user mode, a 'fsck -y' for each file system on the > second disk before trying to mount may help. Yep, fsck -y did the trick. Thanks Konrad ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: using a disk "mirrored" with dd
On Tue, 3 Aug 2004, Matt wrote: > I have a machine running 4.10-RELEASE-p2 with two identical hard disks > -- ad0 and ad2. I would like to make a complete copy of the first disk > to the second disk nightly for quick disaster recovery. > > I've dd'ed the disk as follows > > # dd if=/dev/ad0 of=/dev/ad2 > > and edited the disklabel of the second disk to change ad0s1 to ad2s1 as follows > > # disklabel -e -r ad2 > > However, I'm still unable to mount the root partion (or any other > partition) of the second disk to tweak /etc/fstab etc. even though > > # mount /dev/ad2s1a /mnt > mount: /dev/ad2s1a: Operation not permitted > > What am I missing? Is there anything else I need to do beyond editing > the disklabel to allow me to use the "mirrored" disk? > > Output of disklabel for the two disks follows: > > # disklabel ad0 > # /dev/ad0c: > type: ESDI > disk: ad0s1 > label: > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 4864 > sectors/unit: 78156162 > rpm: 3600 > interleave: 1 > trackskew: 0 > cylinderskew: 0 > headswitch: 0 # milliseconds > track-to-track seek: 0 # milliseconds > drivedata: 0 > > 8 partitions: > #size offsetfstype [fsize bsize bps/cpg] > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > b: 5242880 409600 swap# (Cyl. 25*- 351*) > c: 781561620unused0 0 # (Cyl.0 - 4864*) > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > # disklabel ad2 > # /dev/ad2c: > type: ESDI > disk: ad2s1 > label: > flags: > bytes/sector: 512 > sectors/track: 63 > tracks/cylinder: 255 > sectors/cylinder: 16065 > cylinders: 4864 > sectors/unit: 78156162 > rpm: 3600 > interleave: 1 > trackskew: 0 > cylinderskew: 0 > headswitch: 0 # milliseconds > track-to-track seek: 0 # milliseconds > drivedata: 0 > > 8 partitions: > #size offsetfstype [fsize bsize bps/cpg] > a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) > b: 5242880 409600 swap# (Cyl. 25*- 351*) > c: 781561620unused0 0 # (Cyl.0 - 4864*) > e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) > f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) > g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) > > Thanks for any insight, and let me know if you need to see anything else. Did you do the dd-copy while the system was running multi-user from the first disk? I'd expect larger problems then because the file systems inconsistencies on the second disk may never be resolved. If you did it in single user mode, a 'fsck -y' for each file system on the second disk before trying to mount may help. Best regards Konrad Heuer GWDG, Am Fassberg, 37077 Goettingen, Germany, [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
using a disk "mirrored" with dd
I have a machine running 4.10-RELEASE-p2 with two identical hard disks -- ad0 and ad2. I would like to make a complete copy of the first disk to the second disk nightly for quick disaster recovery. I've dd'ed the disk as follows # dd if=/dev/ad0 of=/dev/ad2 and edited the disklabel of the second disk to change ad0s1 to ad2s1 as follows # disklabel -e -r ad2 However, I'm still unable to mount the root partion (or any other partition) of the second disk to tweak /etc/fstab etc. even though # mount /dev/ad2s1a /mnt mount: /dev/ad2s1a: Operation not permitted What am I missing? Is there anything else I need to do beyond editing the disklabel to allow me to use the "mirrored" disk? Output of disklabel for the two disks follows: # disklabel ad0 # /dev/ad0c: type: ESDI disk: ad0s1 label: flags: bytes/sector: 512 sectors/track: 63 tracks/cylinder: 255 sectors/cylinder: 16065 cylinders: 4864 sectors/unit: 78156162 rpm: 3600 interleave: 1 trackskew: 0 cylinderskew: 0 headswitch: 0 # milliseconds track-to-track seek: 0 # milliseconds drivedata: 0 8 partitions: #size offsetfstype [fsize bsize bps/cpg] a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) b: 5242880 409600 swap# (Cyl. 25*- 351*) c: 781561620unused0 0 # (Cyl.0 - 4864*) e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) # disklabel ad2 # /dev/ad2c: type: ESDI disk: ad2s1 label: flags: bytes/sector: 512 sectors/track: 63 tracks/cylinder: 255 sectors/cylinder: 16065 cylinders: 4864 sectors/unit: 78156162 rpm: 3600 interleave: 1 trackskew: 0 cylinderskew: 0 headswitch: 0 # milliseconds track-to-track seek: 0 # milliseconds drivedata: 0 8 partitions: #size offsetfstype [fsize bsize bps/cpg] a: 40960004.2BSD 2048 1638497 # (Cyl.0 - 25*) b: 5242880 409600 swap# (Cyl. 25*- 351*) c: 781561620unused0 0 # (Cyl.0 - 4864*) e: 4194304 56524804.2BSD 2048 1638489 # (Cyl. 351*- 612*) f: 10485760 98467844.2BSD 2048 1638489 # (Cyl. 612*- 1265*) g: 18874368 203325444.2BSD 2048 1638489 # (Cyl. 1265*- 2440*) Thanks for any insight, and let me know if you need to see anything else. -Matt ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
