Date: Wed, 20 Feb 2019 22:26:02 +0200 From: Christos Chatzaras <chris@cretaforce.gr> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Duplicating file system Message-ID: <4CAB4BC4-0473-41CF-AF03-D1CE796F5545@cretaforce.gr> In-Reply-To: <32153EA7-4BC5-4EE2-98FA-5BDEE1903BA3@cretaforce.gr> References: <0A33E3BE-96C9-4D83-B9F7-D4D2792B5161@kreme.com> <32153EA7-4BC5-4EE2-98FA-5BDEE1903BA3@cretaforce.gr>
next in thread | previous in thread | raw e-mail | index | archive | help
> On 20 Feb 2019, at 22:13, Christos Chatzaras <chris@cretaforce.gr> wrote: > > > >> On 20 Feb 2019, at 21:52, Cerebus <kreme@kreme.com> wrote: >> >> I have an 11.2 system with two identical SSD drives. Currently I am using rsnapshot to keep backups of the primary drive on the secondary drive, but I am interested in having the second drive have a duplicate copy of the entire file system in a bootable form, updated as the root drive is modified. >> >> How would I do this? >> >> I don’t really want a RAID0 because I want to also keep the periodic backups from rsnapshot as the drives are about 10x larger than my data. >> >> -- >> This is my signature. There are many like it, but this one is mine. > > If both disks have the same size the easiest but not fastest way is to use dd: > > dd if=/dev/ada0 of=/dev/ada1 bs=64k I read again your message and I see that you want to keep the snapshots in 2nd drive, so instead of using dd you can: 1) Use gpart/newfs to create new partitions/filesystems (smaller than the 1st disk to have an extra partition for the snapshots) 2) Use dump to make a backup of the filesystems 3) Use restore to restore the data to 2nd disk 4) Use these commands to make the 2nd disk bootable: dd if=/dev/ada0 of=/dev/ada1 bs=512 count=40 gpart recover ada1 Then try to change the boot order for the disks from BIOS to see if everything works as expected.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4CAB4BC4-0473-41CF-AF03-D1CE796F5545>